....but I think I broke the D36.

Ran first pass motor only, beat my old best by .14 and 2 mph. Didn't launch as hard as I could have. Was pinging a little on the big end of the track and was a hair lean. More in it for sure. Fixed that when I got home but didn't have laptop at track to fix it and run again. Today, on motor, it was:

1.666 60ft
7.68 @ 88.42 in the 1/8th
12.08 @ 113.15 in the 1/4

Then I sprayed it. Started with timing backed down and snuck up on it over a few passes. On a 250 shot but couldn't get the bottle pressure much over 900. My big bottle needs another heater! Results:

1.551 60 ft
6.79 @ 102.44 in the 1/8th
10.55 @ 132.78 in the 1/4

After this pass I heard a clunk in the rear when I turned onto the return road, then heard the gears whining slightly when driving back the return road. Figured the diff was shot. Ran it again anyway because I was at 10 degrees retard on the spray and wanted to try 8. Last pass launch was fine but it detonated here and there just a little during the pass so I know for sure the 10 degrees of retard is what my nitrous shot likes. Same clunk and same whining on the return road. I packed it up and drove it back home (track is 1.5 hours from my house) and it made the drive home fine.

After I got home I tweaked the tune and ripped it around a while, tweaked again and ripped again, rear is still holding up fine, but it clunks when turning hard and whines a little on the interstate. Not sure what is wrong in there but I'm 99% sure it is internal. I'm surprised it hasn't grenaded since I'm still beating on it. Don't think it is a U-joint, I'll check it out for sure tomorrow.

Looks like it's time for a D44 and 3.45 gears!

I hate "buts" like that...

Sounds like the diff itself is dying. I wonder if you toasted the clutch pack or a spider gear...

holy shit thing is screaming on the sauce.. what cam are you running? i was running simialr MPH's with my 355 motor. are your afr's eliminators?

Yes, my afr's are the 195 Eliminator street ports. My cam is a flat tappet 230/236 duration cam on a 110 lsa. I really think I'm giving up quite a bit with that cam, someday I'd like to do a 236/242 hyd. roller on a 113 or so lsa.

My mph is really surprising me too. Going to have to do the J55 upgrade this winter. I have Hawk HPS pads front and rear and a bias spring installed but it still takes alot of brake to get it woed down at the end of the track.

The biggest tuning problem with this combo is, when it shifts to 3rd and the converter locks, the rpms drop down to about 4000. That is right about the torque peak, and right where it is most prone to detonation. I have the timing way back in that area and ramp it up quickly after that, but if I lean it out to upper 12's or bottom 13's air fuel ratio it detonates. I have it running 11.7 to 12.5 air fuel ratio to keep it happy. High compression, small efficient combustion chambers, capacitive discharge ignition and a few other things all contribute to a super fast burn. I'm currently running 26.5 degrees from 4800 rpms up, and only 21.5 degrees at 4000 rpms. That is on motor, I retard 10 degrees from that on the spray. Isn't much timing but it's what the engine likes.

Guess the 3.45 gears will somewhat fix that because the rpms that it drops to after the 3rd gear shift and the converter lock will be 4450 rpms, and should pull up towards the redline harder with the lower gears. I'll be crossing the stripe at around 6000 rpms instead of 5350 rpms. Should make a difference.

Sorry to hear about your trouble. I blew something out at Beaver Springs today, and got to ride the flatbed home.

How many 1.6s do you have on that D36? I guess the fact that it's lasted this long is nothing to cry about.

At the track I have maybe 15 1.6X passes and maybe 8 1.5X passes. I really think coming out of the burnout to heat the tires is what was the hardest on it. I try to ease out of it but it still isn't the smoothest. The ET street radials are much stickier than the Nittos were and it could really be felt when ending (and even during) the burnout.

You are correct that it's no crying shame, and it is still holding up fine other than a clunk when I make a sharp turn and some gear whine on the interstate. Hopefully it will get me through till I round up a D44 chunk, batwing, driveshaft, and maybe C-beam. I might redrill my D36 C-beam, and I've heard the D36 driveshaft can be used as-is but then there isn't much clearance at the trans. I'm still searching for more info on that one to be sure.

I have a good line on a D44 centersection with 3.45 gears, but the hardest part is going to be finding a decent priced D44 batwing. Anybody have one they will part with at a reasonable price??

Man Pete, that's too bad. I wanted to come down Sunday but I couldn't. Wasn't planning on saturday because I was to be busy then too but my schedule opened up and I figured I'd run down and make a few runs. Was nervous as I drove theh car there 1.5 hours 1 way, would suck to be broke down.

Did you drive your car there and then have to make arrangements to get hauled home?

What did you break?

Did you get any runs in? If so, what were your times?

It was a good day overall. First run was a 12.25@113mph.
Because they were running a .500 pro tree, I decided to deep stage the car. Lost a tenth on the et, but was whacking out .025 lights all day, so it put me in the hunt.
Made it all the way to the finals, where I red lit by .015.
Oh well, live by the sword, die by the sword I guess.
I ran it out anyway, and crossed the stipe to a fugging cloud of oil.
Top of the motor is wet, so I am hoping it is the oil pressure sending unit(s).
I ordered both this morning.

AAA is a drag racers best friend.

Check out the website www.beaversprings.com

dan it appears that motor was built nice and tight. that is very good news. your never know with a 250 shot of the giggle!

sorry to hear about that pete. keep up updated on what u find.

Glad to hear about your run.

Sorry to hear about your diff

but you knew that was on borrowed time.

Yes, I did know it was on borrowed time for sure.

Can't afford a solid rear, not by a long shot. Hoping that the D44 conversion will survive with my rolling into the throttle on launch instead of matting it right to the floor.

I am on my way with the part gathering.

D44 chunk with 3.45's lined up for $500, should get it in a couple of weeks.

D44 C-beam and driveshaft together for $100.

Just ordered rear bushing kit from p-s-t

45 tooth speedo gear ordered. I should use a 15 tooth drive gear and a 43 tooth driven gear. I have a 17 tooth drive gear, which would require a 46 tooth driven gear with the tires I'm running. I think the 45 tooth should put my speedometer real close, close enough to not pull the tailhousing and mess with the drive gear. If it puts me within 5 mph at 65 I'll be happy. Anyone know how much the speedo will be off with that combo? I'm guessing about 3 mph at 65. Heck, it's off about 3 now even though by calculating it should be dead on.

Still looking for a D44 batwing. I'll buy one of C409's adapter plates and drill my D36 batwing before I buy a new one for $650. Hate to use an adapter plate but if I can't find a used D44 batwing at a reasonable price in the next couple weeks that's what I'll do.

Wow Dan.... 10.5's !! Congrats !

Going to be tough for me to get past you..... but I've got confidence on my side.

Hey Dan, That's a fast car. We all know that D36 was on borrowed time. Congrats on the new best.

Dupe. I guess I double clicked.

My original goal on this setup was a 10.7 on a 225 shot. I'm up to a 250, but I think my solenoid is maxed out, think I'm getting about a 230 or so. Bottle pressure was only 900 with a heater, need to add a 2nd heater. I honestly think with higher bottle pressure, tune dialed in more, and 3.45 gears I'll get down to a 10.40, possibly a 10.30.

When my converter locks just after the 2-3 shift my rpms are dropping down to 3950 with the 3.07's. With 3.45's it will only drop to about 4400 or 4450, and will then get up near 6000 rpms when crossing the stripe. Should be perfect. I know most don't gain much from a gear change with an auto but I'm still dead hooking the launch so I don't think tire spin will slow me down with the new gears, and I think the more optimal rpm at the big end of the track should help me out .1 or .15. Time will tell!