LS1 pushrod question

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Jun 27, 2008 | 05:37 PM

PKC-Z71

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From: Lee's Summit MO

LS1 pushrod question

I'm getting ready to put ported and shaved 5.3 heads (with LS1-sized valves) on my 99 Z28 along with a stock GM 2002 ZO6 camshaft. The heads DO have dual-valvesprings that are made for .600 lift cams. Will my stock pushrods be OK with this setup or do I need to throw down for some hardened ones? I've heard both ways from LSx racers around here, and I wanted to see what some of you guys that have experience building and racing these engines had to say about it. Thanks, Paul

Jun 27, 2008 | 06:07 PM

TransAmcoupe98

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From: Winchester, TN

Hell no, get some strong ones from comp for $98. You WILL break your stock ones in a very short amount of time...

Jun 27, 2008 | 06:09 PM

racer77ss

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the stock pushrods suck and if the heads are milled the valvetrain geometry might be off from stock

Jun 27, 2008 | 06:16 PM

Phoenix 5.7

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From: Prairie de Femme, LA

yeah with milled heads id see if u can get somebody to check proper length. might need some 6.350s or something depending on how much they are milled

Jun 27, 2008 | 06:35 PM

Fratsit

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From: Brookings, South Dakota

Before you buy any pushrods, get an adjustable length PR checker and verify your required length with your desired lifter preload factored in.

..... Hey Phoenix.... I hope you mean 7.350's..... LOL

Jun 27, 2008 | 07:54 PM

Phoenix 5.7

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From: Prairie de Femme, LA

yeah, 7.350. its been along day

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