Thread: rocker ratio?
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Old Aug 13, 2007 | 11:41 AM
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Lumberjack
is made outa laffy taffy
 
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Default rocker ratio?

welp since i have less money then expected to finish my car im just going to resort to the spray.

But i think the top end of my 306 is a bit large as far as flow of cfm.
i currently have the Roush 200 heads which have the 2.02/1.60 valves and a 200cc intake runner. And my intake is the Holley Systemax with a 70mm TB.

my question is i have a cam with only about .512 lift with a 1.6 rr. Since i am no longer going force fed should i look at jumping to a 1.72 rocker to get as much as i can out of the cam since(i think) the heads and intake are a bit big for the 306? i just figured it would make sense, and i shouldnt have any issued with valve clearance either. Plus i have the 1.72 rockers sitting on the shelf still so its no cash out of my pocket either way i go....

anyone see any problem with this? or know how much more overall lift i would gain with the 1.72 over the 1.6 rocker? i think it is something like .020-.030?
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