Quote:
Originally Posted by mechanicalman
They will work better with flat top pistons, proper quench, up to about 8.7-8.8 CR. Keep the cam reasonable and they work OK.
Good eye, GRX, but I'm wondering if the newer crate engines are getting the stamped self guiding rockers yet?
My 88 Formula 350 came from the factory with the self guided rockers despite it still having the pushrod guides in the heads, and I have seen some early 90's Buick stuff (chevy 305/350) that had the same thing.
Did you get the rockers with the heads Coley?
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No rockers...just as they show here.
I know they are nothing unique or high performance....certainly in comparison to the world of Vortec and newer aluminum designs.
That said, it seems that this type of general (Mexico) type head is what is coming on most of those popular jegs/summit crate engines (260hp/290hp) and most of these engine buyers seem to be fairly happy with overall results. I figure they can't be that bad for a quick bolt on or substitute on one of those 350's used for general everyday use.
Now...having said that.....I wonder if there is anything that could be 'easily' done to them to make them flow a little better? Maybe port match the intake gasket? any ideas?....nothing too extreme and mostly an endeavor rooted in curiousity and minor work. Something simple.
All Good
Coley