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

9 second C4 rear end.

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Old Nov 8, 2014 | 01:40 PM
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Default 9 second C4 rear end.

Hi Guys.
A good friend of mine has a 9 second C4.The car usually breaks a spindle every 5 or so passes.The car has been in storage for 5 years now and he wants to bring it back out.What is available for a strong rear end now?He wants to keep the independant suspension.
Thanks
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Old Nov 8, 2014 | 02:28 PM
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One of our members here "rklessdriver" has successfully managed 1.24s/60ft using the Dana 44 IRS. He has a proven working theory of how to do this with IRS. I would suggest contacting him via PM or searching for some of his postings. I have found some of his relevant postings that may help out.

https://www.corvetteforum.com/forums...preciated.html

https://www.corvetteforum.com/forums...post1587073056

https://www.corvetteforum.com/forums...post1586905885

https://www.corvetteforum.com/forums...post1586788319
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Old Nov 8, 2014 | 10:34 PM
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Great info!Thanks to all.
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Old Nov 9, 2014 | 05:36 PM
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I got 32 spline stub axles from summers brothers
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Old Nov 25, 2014 | 10:04 PM
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I would tell him to save the headache and do a solid swap and call it done!! The money he would get for the dana 44 would cover the price of a built rear end and the swap really does not look that bad. All personal preference though.
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Old Nov 27, 2014 | 10:15 PM
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I am wondering if anyone has tried using custom cv axles in place of the half-shafts and stub axles? Or will it just not work?
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Old Nov 27, 2014 | 10:16 PM
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Originally Posted by 396375
Hi Guys.
A good friend of mine has a 9 second C4.The car usually breaks a spindle every 5 or so passes.The car has been in storage for 5 years now and he wants to bring it back out.What is available for a strong rear end now?He wants to keep the independant suspension.
Thanks
I"m using a 9"ford rear build by Carolls rod and race craft of N.J.
and a 1.80 powerglide from coan with a stange drive shaft.
1.25 60ft on radials
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Old Dec 8, 2014 | 07:25 PM
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Dont bastardize the c4. keep the irs. make it work.

There are 8 second IRS c4's out there (youtube it)

You dont need to be faster than that.
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Old Dec 9, 2014 | 07:46 PM
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Originally Posted by dizwiz24
Dont bastardize the c4. keep the irs. make it work.

There are 8 second IRS c4's out there (youtube it)

You dont need to be faster than that.
agreed, but how many 8 second runs can you get on it ?

I have seen MANY 10 second Vette's break the Dana 44 regularly.
Meaning they get 40 - 80 runs and then at some point in the season the rear breaks.

Vic
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