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

8sec IRS C4

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Old Mar 26, 2007 | 11:05 PM
  #21  
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I know it had a set of Dennis (MacDonald's ?) billet spindles. It has since been back halved with a solid suspension. It did break rear suspension components at least once down track. This came from Dennis during the Cruise-In this year.

The nice thing about turbo cars is that they don't make stupid power until the boost comes in and that takes some time. Throw in a 1.7 to 1.9 first gear ratio in a 'glide and you've got the potential to put some power through a '44.

Last I heard Meaney's car has been upgraded since the magazine articles got done. 1400 to 1500 range now.
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Old Mar 28, 2007 | 06:46 PM
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Originally Posted by ski_dwn_it
No way that is a stock IRS in that car taking that sorta power. Might be an IRS, but not in the form that we know it as.

To run that sorta MPH (~3000 lbs) it would be making about 1300hp at the REAR wheels! Absotuley no way it would hold behind a 6 speed.....the glide is most like cushioning the launch but still that is a LOT of power to send thru a D44 - to the tune of about double what I make and mine was borderline. The ujoints would never take that sorta punishment.
It's not the power, it's the hook. What do you cut on a prepped track, low 1.3's? I thought where I read you cut a 1.29 a time or two. That's what is breaking your parts. You're making pretty modest power (~500 RWHP) and the only reason you turn out the times you do is because of the incredible 60's you've gotten the car to turn. If you were cutting 1.7's or 1.8's you could probably pass twice the power you are making through the indy.

I'm not up on the math, but I'm sure someone here is. Someone calculate the force required to move 3000 lbs. 60 feet in 1.30 seconds. Then calculate the force required to cover that same 60 feet in 1.70 seconds. I know it's not a linear equation, but I don't know how lopsided it is. For all I know, it could take twice the grunt to get there .4 quicker. Maybe it's only 30% more, I don't know. What I do know is that the slower you accelerate the car from a stop, the more power the components will handle.

170+ MPH is enough MPH for 7's and change, this car is only in the 8's. You can tell based solely on the high MPH for the ET that it's not leaving super hard. You're knowledge of the making the indy live under extreme conditions is significant, and you are right that anything resembling a stock set-up that hooks like your car and makes 1300+ HP is a pipe dream, but not everyone hooks like you. How long has it taken you to make your car sixty like that? How many other C4's are doing it? Especially on a 10 inch tire? Your car and your abilities to make it turn short times are phenomenal, so they obviously do not apply to everyone. For all we know, that car cuts 2.5's and only lays in the power after the 330 foot mark. Saying that it absolutely can not, under any circumstances, have a stock style rear end is wrong.

It could very well be some crazy indy set up under there, but there isn't enough information in the videos to confirm that.

Last edited by neat; Mar 28, 2007 at 07:09 PM.
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