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Weavsvet | AFR's, Did I gain anything...... | ||
Senior Guru
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Went to Rockingham late yesterday. The track prep was nonexistent. I guess because of not much going on there this weekend. I could not get the car to hook at all(Most other times it has hooked pretty well). Took it quite a ways to finally grab. My shift cable gave up the ghost after the 3rd run which was my best of the day. The weather wasn't good at all. Temp was 89 with a 52% humidity. The tune has not been changed for the AFR's.,,,,,,,,,yet.
Drag Times automatic weather getter is down so I had to look up the weather for the DA. Track elev. is 211'. I was running around a 2800' elev. yesterday. Here was my best run in Feb before the head swap in some really good air. And yesterdays best run in some pretty bad air. 1:45PM 20/FEB/2010 R/T............ .124 60'...............1.753 330'.............5.093 1/8...............7.892 MPH...........88.38 1000'...........10.317 1/4...............12.382 MPH............109.20 8:34PM 11/ JUNE/2010 R/T.......... .270 60'...............1.920 330'.............5.275 1/8...............8.051 MPH...........90.55 1000'............ 1/4...............12.496 MPH...........110.97 |
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Posted on: 2010/6/12 21:03
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Steve40th | Re: AFR's, Did I gain anything...... | ||
Elite Guru
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until you get it re tuned for AFR etc, you arent going to see any gain. If the heads flow better than your last heads, which they should, you wont gain anything till its retuned. Its like putting headers on a car, they are worthless till retuned.
Besides, there is a difference between Rockingham from Feb to June. Been there done that ;) |
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Posted on: 2010/6/12 21:30
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Ko'u ohana aia ku'a ikaika |
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rklessdriver | Re: AFR's, Did I gain anything...... | ||
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You picked up 2mph in the 1/8th and 1mph (almost 2) in the 1/4 which tells me it is making more power in the first 330 but I can see its laying down on the big end of the track -
As you said track prep was crap and your 60ft shows it. Your .2 behind all the way to the 1/8th mile but gained a half a tenth (.05) on the big end time. With the 2 mph increase in the 1/8th I'd expect to see a bigger gain in the 2nd half of the track (like 2-3 tenths) over your other combo. It just tells me for some reason your not making the power in high gear... could be the air, could be the tune, could be a combination of both. Still looks like good numbers for a heads/cam motor with a mail order tune. Get that thing on a dyno with a wide band and see how far the tune is off. Will |
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Posted on: 2010/6/12 21:32
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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Quote:
Thanks Will This car has always been slack at the end of the track. I have the converter unlocked at WOT in both 2nd and 3rd. Does that affect top end? Also, I've been pondering going to 1 3/4 headers in hopes that would help the top end some but I like the torque on the street to much. I plan to take it to a shop that does the tune on the dyno very soon. Mike |
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Posted on: 2010/6/12 21:42
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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rklessdriver | Re: AFR's, Did I gain anything...... | ||
Senior Guru
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Yes it effects the top end. An unlocked TQ Converter eats MPH over a locked one. I would expect the car to mph better with the TQ Converter locked up.
As long as both passes we are compairng here were w/unlocked TQ Converter - The comparison and my opinion is still vaild. Your running 1 5/8" long tube headers?? If so - I wouldn't expect to see any gain on a 350 inch motor by going to 1 3/4". Will |
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Posted on: 2010/6/12 23:36
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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That is a very nice performance improvement !
As per your date and time, Wunderground shows 60 degrees, 30.16 bar & 21.6 dewpoint on your first run in February in which you managed 109.20 mph. Your second run in June was in the 80's with a 30.09 bar & 69.9 dewpoint..... "huge" difference in air quality..... I haven't run my simulation on this, but I don't have too.... if you ran in the same air as the first pass with your new set-up, you would have hit 113 mph and maybe even 114 mph based upon your 110.9.... I think when it starts to cool down this fall, you'll see these traps easily. When all is said and done, I think you will find you have picked up around 4-5 mph with your latest round of modifications. Naturally, a better et will come with improved 60's..... Congrats on your new found performance ! |
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Posted on: 2010/6/12 23:36
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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Thanks for the compliment BeachBum! I didn't blow a head gasket or anything so I guess I did it right this time. I could tell the car had more power just in the way it felt. It's never been that sloppy off the line like it was yesterday. Well, maybe my first run ever on street tires... I don't count that one though. Not sure how much was lack of prep or the improvement in the car but I know I'm looking forward to a better day down there and also a dyno pull or two. |
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Posted on: 2010/6/13 0:18
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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I'll have it locked up then when I get it re tuned. Thanks! |
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Posted on: 2010/6/13 0:20
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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flyboy | Re: AFR's, Did I gain anything...... | ||
Elite Guru
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I thought the 4l60e was designed not to lock up at WOT and that doing so would put a strain on the trans.
Glad your car is back together and running well. |
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Posted on: 2010/6/13 0:25
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'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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I have noticed and tested this theory.... and you can see a very small mph improvement along the lines of a 1/2 mph for a naturally aspirated C4.... but the et does not improve, in part due to when you actually lock the converter up.... which is typically mid-range 2nd or 3rd gear..... the rpm drops immediately when you hit the switch.... thus, the motor has to recover. Therefore, I never saw an et improvement.... However, I had a friend with a heavily modified Turbo Buick V6 that did show a small gain... somewhere around 1.5 mph improvement and the better part of a tenth in et.....not sure, but I think the reasoning behind this is that the boost helps the rpm recover quicker due to the high spikes of torque forced induction can create, but not sure. |
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Posted on: 2010/6/13 1:21
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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Based upon what I am reading in your signature.... I think you have a combination good for easy high 11's in street trim as it sits. Albeit, you might have to wait until it starts cooling down in the fall to see the 11's.... its easily their with that combination. Loosen up that converter another 600-800 rpm and you'll see mid 11's in my opinion. Good Luck !! |
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Posted on: 2010/6/13 1:25
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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Funny how one mod leads to another....when I put that 2800 in there I would never have guessed I'd be where I am now. |
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Posted on: 2010/6/13 1:35
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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You're not kidding.... around 15 years ago, I tore into my motor to simply swap valve seals as a maintenance issue..... I thought, while its apart, I guess I should upgrade something.... fast forward 15 years and a roll of cash the size of I don't even wanna know.... and I'm still not done. Its a disease..... |
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Posted on: 2010/6/13 3:30
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tpi421vett | Re: AFR's, Did I gain anything...... | ||
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You will easily be in the 11's when you get it sorted out in good air.
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Posted on: 2010/6/13 5:17
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AFR Dealer, can sell at prices too low to advertise. 801-953-6391 08 C6 LS3,3LT,Z51,A6,NPP 91 vette,450ci, AFR 220, miniram,FAST, Crane 252/260 solid roller, 200 shot nos, ZF6, 4 link, 9", DA corrected to 1300 ft 9.65@145.xx 450ci now with AFR 235... |
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pr0zac | Re: AFR's, Did I gain anything...... | ||
Elite Guru
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i ran 8.18@90 in 1/8 with my pcmforless tuned lt4 iwht a 280xfi cam, shorty headers slp cat back and 4.10's. that was with a 1.96 60ft. you "should" be able to out run that easily. it fell over on the back end also. i think it was the tune.
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Posted on: 2010/6/14 13:51
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96 lt4. 357ci, 11:1, LE 226/232, LE2 LT4 heads, ported LT4 intake, EM Gladiator44, EM LT's, stock exhaust, NX kit. |
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Josh | Re: AFR's, Did I gain anything...... | ||
Guru
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When I swapped to the AFR heads on my car, it leaned me out a good amount. I realize your a MAF car VS my speed density, but that is what I would guess is going on. Leaning out some, coupled with the load of WOT in high gear, is probably causing the ECU to pull timing. Do you have any data logging gear?
Even after you have a shop tune it, data logging the car at the track is always a good idea. I don't know of a shop in the NC area that has an eddy current dyno, so you're probably going to get a tune based of the way a dynojet loads the motor. It's still going to be great, and be way better than it is now, but the load it will see on the dyno is different that it will see going down the track, so data logging it (at least in the beginning) is a good idea. Good luck with it. PM me the next time you are heading out the track. Jonecap and I hit Rockingham and Nam all the time. |
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Posted on: 2010/6/14 23:31
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"Have ya paid your dues, Jack?" "Yessir, the check is in the mail." - Jack Burton |
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pr0zac | Re: AFR's, Did I gain anything...... | ||
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Posted on: 2010/6/14 23:37
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Josh | Re: AFR's, Did I gain anything...... | ||
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It's still for sale, but I'm not advertising it at all.
Unfortunately, my girl friend had a baby on the 12th so the car will most likely have to go away. Before anyone test drives the car or anything I want to put a catch can on it and button up a couple other things. Once those things are done (I think I can get it squared away in the coming weeks, I took 3 weeks off from work for the birth of the kid, hopefully I can find time in there to work on the car) I'll start to advertise it more agressively. If anyone on the guru is interested, 10K takes it home. I'll deliver it anywhere on the East coast for free. |
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Posted on: 2010/6/15 4:52
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"Have ya paid your dues, Jack?" "Yessir, the check is in the mail." - Jack Burton |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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Quote:
Thanks for chiming in Josh! Tuner said something similar to your thoughts on it. I have a Moates data logger on the way and should be here Wed. I've decided to bypass the dyno tune and just do runs at the track with the data logger. I also have a Jet cable coming so I can upload the new tune myself. This way will be much slower about tuning the car but like you I feel in the long run it will be more accurate. I have no doubt there is a lot on the table left to gain. Hey, if you guys decide to go down there PM me and I might tag along. I have to get the car running better though you two will make me look bad if I don't. On another note.....I emailed Weatherunderground about the weather stats down there. They lost the weather station that was providing the data. They've switched to another one so the automatic weather is back on the Drag Times DA calculator for The Rock. Here is my actual DA for this past Friday the 11th. Track Elevation....... 211 Air Temp.............. 87.8 Barometric Pressure... 29.94 Humidity.............. 43% ET.................... 12.496 MPH................... 110.97 DA................... 2317' Stock and Mildly Modified Naturally Aspirated Engines 12.157 @ 114.137 MPH |
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Posted on: 2010/6/15 8:01
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Josh | Re: AFR's, Did I gain anything...... | ||
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Ya, that's some pretty bad air for the Rock. In the cooler months seeing negative DA out there is pretty normal.
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Posted on: 2010/6/15 19:20
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"Have ya paid your dues, Jack?" "Yessir, the check is in the mail." - Jack Burton |
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88BlackZ51 | Re: AFR's, Did I gain anything...... | ||
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Edited by Matatk
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Posted on: 2010/6/16 4:00
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88BlackZ51 | Re: AFR's, Did I gain anything...... | ||
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Cool Test. Makes you wonder what gains would be had with there comp ports. |
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Posted on: 2010/6/16 4:01
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Josh | Re: AFR's, Did I gain anything...... | ||
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Edited by Matatk
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Posted on: 2010/6/16 23:00
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"Have ya paid your dues, Jack?" "Yessir, the check is in the mail." - Jack Burton |
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pr0zac | Re: AFR's, Did I gain anything...... | ||
Elite Guru
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Edited by Matatk
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Posted on: 2010/6/17 3:33
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88BlackZ51 | Re: AFR's, Did I gain anything...... | ||
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Edited by Matatk
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Posted on: 2010/6/17 3:56
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Matatk | Re: AFR's, Did I gain anything...... | ||
Webmaster
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Keep this on topic and quit trolling on someone else's post. If you have to engage in a childish argument, take it to PMs.
Matthew |
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Posted on: 2010/6/17 11:38
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
Senior Guru
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DYNO RESULTS!!!!!!!!!!!
I don't have the graphs yet but I couldn't wait to post the numbers on the pulls. The correction factor was STD, no smoothing. First pull with the PCM unchanged from the last tune I had with the stock heads. Cutouts wide open. 364.30 rwhp 330.67 torque Second pull same PCM. On this pull I opened the cutouts about half way. All the rest of the pulls were with this same cutout setting. 370.51 rwhp 333.27 torque Ok, now comes the good part. Just by chance that there was a issue with the PCM as to why I could not connect to it I carried two other ones I had with me to change out just to see if one of them would take the new tune my tuner had sent me. The supposedly stock one I had would not take it. The software said the PCM was not compatible with the tune I was going to install. Probably out of an F body. Tried the other one which is one I had bought from my previous tuner with his tune in it. It took it!!!. 372.66 rwhp 338.80 torque One last pull and it was scary! One of the straps at the back was to close to the exhaust cutout and I guess and it burnt into. Not really any good spots back there to hook the things up. The car took a hard jolt to the right but Mike got on the dyno brake really fast so it stayed on the drum. He also had chock blocks in front and behind the front tires. Thank goodness!!! That's something a lot of operators don't do. 376.50 rwhp 334.66 torque One last thing. When I changed the PCM out I forgot to switch the LT4 knock module. I would bet money it was pulling timing on the last two pulls. The last two runs are kind of choppy at the end. Mike said in a controlled atmosphere it would been a little over 400 rwhp. The temp was in the mid upper 80's from the heat of the car (It's a small shop the dyno is in) with a humidity of 46-56%. I'll post the graph files as soon as I get them. I'm pretty happy! This is about a 40 rwhp gain over my best pulls with the stock heads. |
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Posted on: 2010/6/19 14:49
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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BrianCunningham | Re: AFR's, Did I gain anything...... | ||
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That's quite an improvement
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Posted on: 2010/6/19 20:03
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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Thanks Brian!
I thought it was also. I'm going to give the track another shot this evening just to see if it does improve there any. |
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Posted on: 2010/6/19 20:34
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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Posted on: 2010/6/20 9:11
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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flyboy | Re: AFR's, Did I gain anything...... | ||
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Nice numbers, where are you shifting?
Also, at what rpm does the H.P. curve cross the torque curve on the graph? |
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Posted on: 2010/6/20 14:42
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'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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The first dip is undoubtly where you are coming off the converter.... but the 2nd one, you look a little lean going into it, maybe you just need to fatten it up a bit and see what happens. Other than that.... I do not know. |
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Posted on: 2010/6/20 15:14
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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All cars regardless of make or model cross at exactly 5252 rpm..... mathematically they have too. |
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Posted on: 2010/6/20 15:15
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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Thanks flyboy! It's an A4 so my tuner set that at what he thought was best. |
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Posted on: 2010/6/20 16:06
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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uh-oh..... knew my car was mathematically challenged....... Seriously, why don't mine cross at 5252? A graph issue? |
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Posted on: 2010/6/20 16:09
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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Your numbers do cross at 5252 rpm.... the graph has two different scales is why they do not appear too on the graph itself.... right side is torque, left side is HP....
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Posted on: 2010/6/20 16:52
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863 cubic inches of C4 & C6 muscle C6 Corvette Z06 - Lemans Metallic Blue C4 Corvette 436 - Pure Black http://www.cardomain.com/ride/3933547 ... chevrolet-corvette/page-1 |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
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Remember, the formula....
HP = Torque x RPM/5252 It has to cross at 5252 rpm....its mathematically impossible for it not too. |
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Posted on: 2010/6/20 16:54
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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I'm not seeing but I'll take your word for it. I had always read they were supposed to cross at 5252 and wondered why mine didn't on the graph. I'm still wondering........ |
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Posted on: 2010/6/20 17:04
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
Master Guru
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Look at your graph, in the upper left hand corner, notice how it shows 400 up their.... now go to the upper right hand corner.... notice how it shows 340..... that is because each side has a different scale. So when you look at your torque curve and want to know how much torque you have, you go by the scale on the right hand side of the dyno graph.... for HP, you go by the scale on the left hand side.
Knowing this, you will notice that at 5252 rpm, you have just under 330 HP and also just under 330 ftlbs of torque. |
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Posted on: 2010/6/20 17:12
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863 cubic inches of C4 & C6 muscle C6 Corvette Z06 - Lemans Metallic Blue C4 Corvette 436 - Pure Black http://www.cardomain.com/ride/3933547 ... chevrolet-corvette/page-1 |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
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I see. Thanks for the explanation BeachBum!
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Posted on: 2010/6/20 17:17
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
Senior Guru
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I also have a question about the torque.
Before I installed the heads I had 328 ftlbs of torque. The torque did not increase very much compared to rwhp. Is this because of the cam grind and the rpm at which it is designed to perform? If not this then why? Thanks, Mike |
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Posted on: 2010/6/20 18:11
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
Master Guru
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It can.... it depends on the set-up, but typically as you increase your engines breathing ability, you will be shifting your torque curve higher in the rpm range.... hence, your peak tq may only be marginally improved, but your overall HP curve is much more powerful. This is of course due to the larger cylinder heads, more cam, etc... Having said that, now that I have reviewed your torque curve, I notice that dip you talk about previously is right in the area that you should have your "real" torque peak....(It shouldn't be at 5500 rpm with your cam, but it is because where its supposed to be is missing, leaving 5500 rpm as the next high point)..... I think that dip has chopped off the hill of torque that should be their. I would guess, it would keep rising instead of stopping and going down where it does..... In my opinion, with the set-up you have, your Torque peak should be in that 4600-5000 rpm area..... and with that dip happening at that precise rpm.... notice that it goes flat at 4300 rpm and then actually goes down at 4600 rpm..... invert that dip into a hill, and that is probably more along the lines of what your torque curve should look like.....you're missing a bunch of torque and that may even improve the curve above it when you get it fixed.... You need to get it back on the dyno and tune out that dip.....and I think you'll find at least 20 more ftlbs of torque at that rpm.... probably more. Kind of looks like you need more fuel, but I think its more than that... I'll bet you're getting some detonation or perhaps the ecm is pulling a bunch of timing out in that area, but not sure, just guessing. good luck ! |
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Posted on: 2010/6/20 18:50
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BrianCunningham | Re: AFR's, Did I gain anything...... | ||
Senior Guru
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could that be the knock sensor he already mentioned taking out timing?
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Posted on: 2010/6/20 19:21
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
Master Guru
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I would think so.... |
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Posted on: 2010/6/20 19:47
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flyboy | Re: AFR's, Did I gain anything...... | ||
Elite Guru
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O.K. and where are you shifting at the track? Thanks
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Posted on: 2010/6/20 19:50
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'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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BeachBum | Re: AFR's, Did I gain anything...... | ||
Master Guru
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I think your torque curve should instead look something like one of these I filled-in with theortical curves....
Not sure which one.....but it could be the purple one that not only helps the torque where its missing, but extends the power up into the rpm range. At the very least, it is one of the other two. [IMG]http://i526.photobucket.com/albums/cc342/tldrane/weavdyno.jpg[/IMG] |
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Posted on: 2010/6/20 19:50
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flyboy | Re: AFR's, Did I gain anything...... | ||
Elite Guru
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O.K. and where are you shifting at the track? Thanks
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Posted on: 2010/6/20 19:52
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'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
Senior Guru
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Posted on: 2010/6/20 19:58
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
Senior Guru
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I can't answer that flyboy. I put it in drive, not OD and go. Should I be shifting manually? I have asked this before(not here) and the consensus was to let the tune do the shifting for me. Some said to do it manually though. |
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Posted on: 2010/6/20 20:01
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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Weavsvet | Re: AFR's, Did I gain anything...... | ||
Senior Guru
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That would be great! But still, this cam is a across the board cam,1900-6200. You're saying it can deliver something like this? |
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Posted on: 2010/6/20 20:05
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1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage |
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