C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

replacing opti spark with HEI dist.

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Old Apr 29, 2013 | 07:54 PM
  #21  
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Originally Posted by STEVEN13
You are saying 12.37 with 289 HP, 3500 stall converter, and 4.10 gears? What is the weight of your car?
X2.

I don't know what math you're using but something is out of whack. HOw you got a 3400# car to go 12's/108 on ~320chp is something that I can't wrap my head around. You have a 75 shot in there that you didn't mention?
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Old Apr 29, 2013 | 08:00 PM
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Originally Posted by Tom400CFI
X2.

I don't know what math you're using but something is out of whack. HOw you got a 3400# car to go 12's/108 on ~320chp is something that I can't wrap my head around. You have a 75 shot in there that you didn't mention?
I calculated at least 340 chp... big sloppy high stall converters often dyno LOW and if its a mustang dyno or other unfriendly dyno he's in the ball park

Mike

Last edited by aboatguy; Apr 29, 2013 at 08:04 PM.
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Old Apr 29, 2013 | 08:14 PM
  #23  
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Originally Posted by Tom400CFI
X2.

I don't know what math you're using but something is out of whack. HOw you got a 3400# car to go 12's/108 on ~320chp is something that I can't wrap my head around. You have a 75 shot in there that you didn't mention?
Hey Tom,dynojet print out reads 289.27 max power & 310.20 max torque. It was not the operators first rodeo, and I would guess he would want to feed my head with big numbers cause I pay in cash. The numbers may not be correct I don't know. I baby sat the car at the dyno & looked over his sholder, and I drove the car at maple grove.I have a dyno print out & a time slip. So 3400lbs + 289.27hp = 12.37 et & 108.96 . Whats wrong with my math ?
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Old Apr 29, 2013 | 08:18 PM
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Originally Posted by moenoyze
Hey Tom,dynojet print out reads 289.27 max power & 310.20 max torque. It was not the operators first rodeo, and I would guess he would want to feed my head with big numbers cause I pay in cash. The numbers may not be correct I don't know. I baby sat the car at the dyno & looked over his sholder, and I drove the car at maple grove.I have a dyno print out & a time slip. So 3400lbs + 289.27hp = 12.37 et & 108.96 . Whats wrong with my math ?
Hey aboatguy, The dyno run was with a 1800 converter, kinda tight.
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Old Apr 29, 2013 | 09:47 PM
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Originally Posted by moenoyze
So 3400lbs + 289.27hp = 12.37 et & 108.96 . Whats wrong with my math ?
One of the three numbers.

C6's (as an example) weigh ~3200 lbs + 400chp(or ~350whp on average) and run at best, 12.2x's and up.

http://forums.corvetteforum.com/1552486175-post4.html

So how do you add 200 lbs, take away ~60 rwhp, and still run about the same times?

If you're accomplishing those numbers with that hp, then that is fantastic. Numbers are great either way. Fast car you've got there.
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Old Apr 30, 2013 | 07:04 AM
  #26  
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Originally Posted by Tom400CFI
One of the three numbers.

C6's (as an example) weigh ~3200 lbs + 400chp(or ~350whp on average) and run at best, 12.2x's and up.

http://forums.corvetteforum.com/1552486175-post4.html

So how do you add 200 lbs, take away ~60 rwhp, and still run about the same times?

If you're accomplishing those numbers with that hp, then that is fantastic. Numbers are great either way. Fast car you've got there.
Hey Tom, I think the 10 in 3500 converter had something to do with the results. Dyno pulls used 1800 converter and at the track the car fell flat, bogged real bad. Best ET 12.96 but MPH was 108.55. After converter change no bog , leaves like a stick car, in high gear by half track. I too am amazed at the results. Dyno results skewed by tight converter ????? In my younger days I raced modified production class C/SM, with a 305 low gear & a 620 rear leaving at +9500 there was no bog. HA, HA.
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Old Apr 30, 2013 | 07:16 AM
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Originally Posted by Tom400CFI
One of the three numbers.

C6's (as an example) weigh ~3200 lbs + 400chp(or ~350whp on average) and run at best, 12.2x's and up.

http://forums.corvetteforum.com/1552486175-post4.html

So how do you add 200 lbs, take away ~60 rwhp, and still run about the same times?

If you're accomplishing those numbers with that hp, then that is fantastic. Numbers are great either way. Fast car you've got there.
The OP car has 4.1x gears and a 12 bolt solid axle with a low 60' time. This will help ET.

Regards,
Steve
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Old Apr 30, 2013 | 11:09 AM
  #28  
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Well, I guess that is one efficient drive train! Amazing numbers. My stock LT1/M6/3.45 just did 278/312 at the wheels, so down 11hp/up 2tq from you, and it weighs closer to 3200 (stick/stripper car). It might go 12.999999999999999 at sea level. But to go .7 quicker than that w/11 more hp and more weight is impressive. That car is dialed in!
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