hi just want to know if many people try the s1x with roller rockers i searched and what i found is many times you need to modify the head for 1.7 and 1.8 roller rockers but i have intense racing stage 3 heads and can go up to .600 lift. i have many mods like gen v intercooler n* tb is3 heads .... do i will have big gain with the 1.7 or 1.8 vs 1.6 roller rockers does it has poeple try the different combo ????? i have a fiero and want some power but dont want to loose all the low rpm range. many thanks all

Use stock rockers

------------------
Turbo 3800 E85 F23 5spd spec5
10.91@133.1

stay with stock

Technically a 1.8 roller would give you more valve at low cam lift areas than stock would, but I am not sure if it would do anything to change the power curve as LSA and duration is not going to change.

thanks all just wanted to have some input about that i think i will stay with stock 1.6 rr

Stock stock right? Not roller tip.

------------------
Turbo 3800 E85 F23 5spd spec5
10.91@133.1

quote Originally posted by Justinbart: Stock stock right? Not roller tip.

why all say stock and not 1.6 roller rockers i tought it was better the roller because the roller will less damage the valve guide and valve stem tips no ?????

Stock is better than a roller tip. The way the tip is designed will give you more lift than a roller tip. ZZP has an article on it somewhere.

------------------
Turbo 3800 E85 F23 5spd spec5
10.91@133.1

stock rockers are equivalent in lift performance to a 1.8 rocker. Its never been proven that 1.8s make more power either.

I made less power with 1.7 rollers than stock. Back to back dyno runs.

------------------
10.263 @ 134.44MPH - 1.49 60'
Billet 6262 Precision turbo, PT1001 intercooler, ST1 cam, 130lb springs, comp pushrods, HV3, ARP Rod bolts, otherwise stock L36.


Old M90 XP Cam time -
11.425 @115.60
1.543 60'

quote Originally posted by LFiero67: I made less power with 1.7 rollers than stock. Back to back dyno runs.

with the stage 1 x cam or another cam ?????

XP