7.4 or7.35 pushrods?
03-21-2004, 04:21 PM
#1
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7.4 or7.35 pushrods? what is the difference. besides the length. what other modifications to the valvetrain do I need to make to make the 7.35's fit.
thanks
Wesley
thanks
Wesley
03-21-2004, 05:43 PM
#4
they may be a little loose.
stock pushrods are 7.38" i believe, and almost all aftermarket cams have a slightly smaller base circle that stock, which means you need a slightly longer pushrod, hence most people run a 7.4" because the hydrolic lifters can take the extra pressure.
but milling the heads means you need a shorter pushrod which is why people running heads milled .030+ run 7.35's
so basically, aftermarket cam and stock heads, run 7.4
stock pushrods are 7.38" i believe, and almost all aftermarket cams have a slightly smaller base circle that stock, which means you need a slightly longer pushrod, hence most people run a 7.4" because the hydrolic lifters can take the extra pressure.
but milling the heads means you need a shorter pushrod which is why people running heads milled .030+ run 7.35's
so basically, aftermarket cam and stock heads, run 7.4
03-22-2004, 12:57 AM
#6
actually..with milled heads (.030") and aftermarket cam it will still be a 7.4" PR...most cams are .030" smaller on the base circle radius..so they would cancel each other out