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| crazytigr96vet383 | newby with a thirst for corvette knowledge | ||
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Guru Newb
 
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i have a 96 collectors edition that has some work done to it.AFR 210 CC Heads,lt4 intake, comp 280 xfi cam,headers,egr,air delete,programmed by pcm4less ,recent tranny rebuild.they had the car for 6 weeks,took them 3 times to get it done,paid for shift kit but cant tell any difference,went with stock stall.msd opti.58mm throttle body,forged internals,msd 8.5 wires,10.7:1 compression ratio.stock gears(whatever that is,in od im 2200 rpm at 80 mph.custom valve covers,7qt canton oil pan,hydrolic roller lifters,1.6 rocker arms,and on and on. i have a book of receipts from previous owner.i know hardly nothing about the car so any suggestions are appreciated. chasis dyno last week best pull was 365hp 480lb torque @5100 rpm. does this sound accurate? motor has 9k miles since build in 09.
Attach file:  corvette motor 1.jpg (0.00 KB) |
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Posted on: 2012/6/16 18:39
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crazytigr96c4/383 |
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| Matatk | Re: newby with a thirst for corvette knowledge | ||
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Webmaster
 
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Welcome to the site! Sounds like a great build. I would say those are healthy numbers and right in line with your mods.
Matthew |
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Posted on: 2012/6/16 18:44
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| 1Fast04Vert | Re: newby with a thirst for corvette knowledge | ||
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Elite Guru
 
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Look in the storage compartment behind the passenger seat and you will find your RPO codes, which will tell you the rear end ratio. GM1 is 2.59, G-92/G-44 is the 3.07. Sorry I can't help you with the tranny problems. Perhaps pcm4less can tell you if it is a programming problem.
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Posted on: 2012/6/16 18:47
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2004 Vert. 475hp. Built by Vengeance Racing |
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| crazytigr96vet383 | Re: newby with a thirst for corvette knowledge | ||
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Guru Newb
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the only one of those numbers i saw that matched was the GM1. There is proably 20 sets of numbers there. thanks for that info. i got another question for ya.i want to go to a 373 gear,is it worth it and would i have to change more than gear ratio or would the dana 36 hold up to the motor.
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Posted on: 2012/6/16 19:18
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crazytigr96c4/383 |
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| 1Fast04Vert | Re: newby with a thirst for corvette knowledge | ||
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Elite Guru
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With your HP, 3.73 gears and sticky tires I would doubt if the D36 would last very long. There is a guy near us in Acworth that parts out C4s and could set you up with a D44 and 3.45 gears. His name is Chris and phone is 770-546-3504 (weekdays during regular business hours). Otherwise you could probably find a D36, 3.07 rear ready to drop in for under $500.
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Posted on: 2012/6/16 20:12
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2004 Vert. 475hp. Built by Vengeance Racing |
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| crazytigr96vet383 | Re: newby with a thirst for corvette knowledge | ||
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Guru Newb
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will do thanks again.
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Posted on: 2012/6/16 20:46
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| bogus | Re: newby with a thirst for corvette knowledge | ||
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Grand Imperial Pooh-Bah
 
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welcome aboard!
I agree, too much power and too much traction, the D36 well not be long for this world!!! The engine sounds pretty stout, but with an ODBII computer, I see no reason to ship it out for programming. You need to find someone local - and you ain't far from Atlanta - who can dyno tune that beast. I will bet money you will find some more power that way. Also, check with your local hot rod and Corvette clubs to see who they recommend. |
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Posted on: 2012/6/17 2:56
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| crazytigr96vet383 | Re: newby with a thirst for corvette knowledge | ||
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my main problem is when at the redlight im idling so rough my voltage hand is jumping all around,how can i raise the idle up when im in at redlight, but not cause it to jerk foward when i put it in first?
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Posted on: 2012/6/20 2:24
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| Ultraman | Re: newby with a thirst for corvette knowledge | ||
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2015 Memorial Day Car Show Winner!
 
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Welcome to the show.....plenty of knowledge on tap here...Pics of the car when you get a chance....
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Posted on: 2012/6/20 3:13
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2010 Grand Sport Coupe Gone but not forgotten... Vote DeSantis in 2024.... Make the IRS go away... |
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| djxib | Re: newby with a thirst for corvette knowledge | ||
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Senior Guru
 
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Quote:
Raising the idle isnt straightforward physically - you have to do it in the tune. However, according to comp the XFI280 cam has a strong idle so I wouldnt expect it to be rough like you describe. Before you look at idle speed I recommend you do some basic troubleshooting, maybe start a new thread over in C4 Tech. Could be anything from arc-ing plug wires (check in a dark garage) to a vacuum leak to old injectors to a poor tune.. start from the basics and work upwards. Oh - and congrats on the car - nice numbers! |
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Posted on: 2012/6/20 12:01
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Andy 1996 Greenwood Collectors Edition LT4 Previously 1992 Convertible Polo Green. 383 LT1/LT4 forged/balanced. V7-YSi, Alky. 608RWHP... Now sitting at a dismantler with a salvage title. Still runs... |
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| Trae1976 | Re: newby with a thirst for corvette knowledge | ||
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2012 Memorial Day Car Show Winner!
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Welcome crazytigr! Sorry, I can't help with the knowledge part. |
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Posted on: 2012/6/20 12:26
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| EngineDoctor | Re: newby with a thirst for corvette knowledge | ||
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Master Guru
 
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Welcome aboard, and nice numbers !
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Posted on: 2012/6/20 19:40
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| crazytigr96vet383 | Re: newby with a thirst for corvette knowledge | ||
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Guru Newb
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thanks guys,can anyone explain to me why i only did 365rwhp on the chassis dyno but had 480lbs of torque?? i was told this motor was capable of 500 hp. which is better, hp or torque when it comes to taking it to the track?
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Posted on: 2012/6/20 21:22
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| EngineDoctor | Re: newby with a thirst for corvette knowledge | ||
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IMHO it's all in the combo ! Let's see wat the other guys think ? |
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Posted on: 2012/6/20 21:41
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| BillH | Re: newby with a thirst for corvette knowledge | ||
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The Stig Moderator
 
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Drags - horsepower for mid track to top end. Roadrace - torgue - always |
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Posted on: 2012/6/20 21:56
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| EngineDoctor | Re: newby with a thirst for corvette knowledge | ||
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X 2 on that ! |
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Posted on: 2012/6/20 22:18
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| djxib | Re: newby with a thirst for corvette knowledge | ||
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Senior Guru
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I'd need to see the actual graph, but 'typically' a much higher torque number than HP is a characteristic of a motor with a small turbo or nitrous. If your 365hp figure is at 5500 RPM then I would say maybe the heads are restricting higher end horsepower. However - your torque number is very very nice for a NA motor.. I bet that thing pulls hard! Personally I wouldnt mess with anything except to try and fix your poor idle. |
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Posted on: 2012/6/21 12:29
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Andy 1996 Greenwood Collectors Edition LT4 Previously 1992 Convertible Polo Green. 383 LT1/LT4 forged/balanced. V7-YSi, Alky. 608RWHP... Now sitting at a dismantler with a salvage title. Still runs... |
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