1.6 roller rockers

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Mar 22, 2004 | 06:49 PM

mdhoward@family

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1.6 roller rockers

I have a 89 GTA 5.7L. Bigger cam than stock, no head work.
How much will 1.6 roller rockers help?

Thanks

Mar 22, 2004 | 08:45 PM

dj haf

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From: Miami, Florida

Car: 1990 IROC-Z

Engine: 350 L98

Transmission: 700R4

10 hp possibly, depending on the cam. you'll notice the difference the moment you crank her up with the 1.6 rr's.

what are your cam specs?

easy math right here:

get your lift intake, divide it by 1.5, then multiply it by 1.6. that'll give your lift. then do the same for your exhaust lift and you're all set

Mar 23, 2004 | 06:37 PM

mdhoward@family

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Quote:

Originally posted by dj haf
10 hp possibly, depending on the cam. you'll notice the difference the moment you crank her up with the 1.6 rr's.

what are your cam specs?

easy math right here:

get your lift intake, divide it by 1.5, then multiply it by 1.6. that'll give your lift. then do the same for your exhaust lift and you're all set

The cam specs are 218/224 duration @ .050, 495/503 lift 112ls

Mar 23, 2004 | 10:49 PM

vernw

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From: Dallas, TX area

Car: 91 Formula WS6 (Black, T-Tops)

Engine: 383 MiniRam (529 HP, 519 TQ - DD2K)

Transmission: Built '97 T56, Pro 5.0, CF-DF

Axle/Gears: 4.11 posi Ford 9"

JUST MKAKE SURE YOUR VALVE SPRINGS WILL TAKE THE EXTRA VALVE LIFT WITHOUT BINDING BEFORE GOING TO 1.6 ROCKERS!!! (unless you've changed them, they probably won't handle it)