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Author Topic:   Roller Rockers
Dirt Full Roller

Total posts: 73
posted June 26, 2002 01:18 AM
I was just wanting to know what would happen if I ran 1.6 rockers on the intake, and 1.5 on the exhaust, and also visa versa. If anyone has any input please help me.

Dirt Maniac

Total posts: 115
posted June 26, 2002 08:04 PM
Try it and see. as long as you have enough valve clearance it cant hurt anything. some engine combos could benefit from a little more intake or exhaust lift.

Dirt Freak

Total posts: 201
posted June 27, 2002 01:15 PM UIN: 27426975
we run 1.6 on intake, and 1.5 on exhaust. allows more fuel into cylinders


Dirt Newbie

Total posts: 4
posted July 13, 2002 01:42 AM UIN: 17155600
All depends on what head/cam combo your using..without acess to a dyno,its a shot in the dark..stock type gm heads like them as them but on the exhaust side..but then again if your running a split cam and the eng was parts "matched" you really shouldn't need them..if you gain power by using them then you were using the wrong cam to begin with...buuuut,if its a cam restricted class,you can up both int and exh and make a cam feel bigger to the eng!!

Dirt Forum Racer

Total posts: 96
posted July 13, 2002 10:32 AM
My engine guy spent the first three weeks of the season reading plugs changing jets, playing with the timing and changing rocker arms back and forth from 1.5 to 1.6 to get even plug readings to make it run great. If you pull the plugs it hard to find any difference between them they look like they burn exactly the same. But he didnt just put 1.6 on the intake and the 1.5 on the exaust. on 1 hole he may have 1.5 IN and 1.6 EX but the next hole may have 1.6 on both IN and EX. he used them as a fine tuning tool and it does make a difference.

Dirt Roller

Total posts: 12
posted July 26, 2002 08:56 PM
what carb and maniflod do you run rules! my undering is you get more CC volume it creats scavagen

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