Off set rocker arms
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 1,130
Likes: 106
From: laingsburg MI
2020 C3 of the Year Finalist - Modified
Off set rocker arms
Been kicking this idea around for a while. I have edelbrock perf. rpm heads on my 11:1 cr. 383. They have been ported, 2.05" intakes installed, port matched to my victor jr. intake. The intake volume is 195cc. I have a 252 -262 @.050" solid cam utilizing 1.6 rockers. I think the cross section is a little small for the cam & 6000 + rpm range.
The idea is to get some .150" offset intake rockers & weld or epoxy the pushrod clearance on the outside of the port to gain approx. .125" more width on the cross section of the intake port.
This would straighten the curve of the inside port wall & increase the minimum cross section. Airflow quality & amount should improve.
I can't justify better heads yet!
Feedback appreciated. thanx
The idea is to get some .150" offset intake rockers & weld or epoxy the pushrod clearance on the outside of the port to gain approx. .125" more width on the cross section of the intake port.
This would straighten the curve of the inside port wall & increase the minimum cross section. Airflow quality & amount should improve.
I can't justify better heads yet!
Feedback appreciated. thanx
Last edited by 73C34me; May 23, 2007 at 07:28 PM. Reason: larger port cross section
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
You can ruin head flow and cause fuel sepperation just by having an inexperienced porter hog away.
2.05 valves are pretty small and will limit flow at some point. The use of offset lifters and or rockers is very common.
Your mechanical cam is also a limitation. The way to getting the most out of your heads is holding the valve at the higher CFM's of flow for the longest amount of time. That is why I use solid roller and over .700 lift
2.05 valves are pretty small and will limit flow at some point. The use of offset lifters and or rockers is very common.
Your mechanical cam is also a limitation. The way to getting the most out of your heads is holding the valve at the higher CFM's of flow for the longest amount of time. That is why I use solid roller and over .700 lift
