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1700 hp through a 6l90 trans

SoCalDave

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Thought to share this with the members. Always heard these trans were pretty reliable.

 

Bigbore500r

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Thought to share this with the members. Always heard these trans were pretty reliable.

Yes they are!
My friend's Chevy SS is running 151mph+ trap speeds on a stock bottom end LS3, and Stock 6L90 trans.
Not saying its happy with the stock trans....but it's holding! The diff is a different story, after 2 passes it grenaded. Car is currently running 9..4 and he feels with some better traction and more tuning the car should break into the 8's. He's running a 2.7 litre Harrop blower, frankestien heads, 2" primary headers, and a donkey dick cam grind of secret spec.
 

Sherpa

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do you know which heads he is running from Frankenstein???? I really like to 710 heads.... 10 degree, perfect for turbo or supercharged.
 

Bigbore500r

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do you know which heads he is running from Frankenstein???? I really like to 710 heads.... 10 degree, perfect for turbo or supercharged.
I dont know which ones specifically. I see they have the o-ring exhaust seals, a massive green valvecovers.......that's about all the info I got
 

monkeyswrench

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Haven't been able to play with a 90. Are they like an 80?
I've done a few of them, they cross parts with 400's, so they are pretty stout. My stuff tends to be donor pickup cannibalization...nothing cool yet.
 

Gelcoater

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Yes they are!
My friend's Chevy SS is running 151mph+ trap speeds on a stock bottom end LS3, and Stock 6L90 trans.
Not saying its happy with the stock trans....but it's holding! The diff is a different story, after 2 passes it grenaded. Car is currently running 9..4 and he feels with some better traction and more tuning the car should break into the 8's. He's running a 2.7 litre Harrop blower, frankestien heads, 2" primary headers, and a donkey dick cam grind of secret spec.
Donkey dick cam grind...Noted😂
 
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