1.5 OR 1.6 rockers??? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-23-2012, 09:25 PM
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1.5 OR 1.6 rockers???

Ok I have the comp 280h cam should I keep using my stock 1.5 rockers or would it be better to use the 1.6 rockers? How much more lift would it give my cam? right now my lift is 480.

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Old 08-23-2012, 09:49 PM
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1.5 rockers.If you want more lift get a bigger cam
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Old 08-23-2012, 11:51 PM
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Are Roller Rockers Worth It? by Marlan Davis.
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Old 08-23-2012, 11:52 PM
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1.5 ratio rockers with a .480 lift cam
With the 1.6 rockers ... lift would be .512
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Old 08-24-2012, 10:24 PM
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Quote:
Originally Posted by Deuce View Post
1.5 ratio rockers with a .480 lift cam
With the 1.6 rockers ... lift would be .512
when I change my rockers to 1.6 can I still use my old push rods?
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Old 08-24-2012, 10:30 PM
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Quote:
Originally Posted by the82elco View Post
when I change my rockers to 1.6 can I still use my old push rods?
If they were correct for the 1.5's, they should be fine with the 1.6s.

Depending on what heads you have, you will need to check for pushrod contact against the head where the pushrod passes thru. Increasing to larger ratio rockers inreases the front to back sweeping motion of the pushrod.
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Old 08-25-2012, 02:26 PM
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Quote:
Originally Posted by vinniekq2 View Post
1.5 rockers.If you want more lift get a bigger cam
+1

I would avoid 1.6's.

These guys actually used a dyno for this question and found that 1.6 rockers lost 40 horsepower.

Adding Power Using Rocker Arm Ratios
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Old 08-25-2012, 03:10 PM
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I had a set of Scorpion 1.6 rollers on my skiff motor with solid lifters. I found them noisy even when tightening up the lash. Switched to the Scorpion 1.5 with recommended lash, no excess noise. No difference in the way it runs that I can feel, less stress on the valve springs too.
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