Push rod length question

[bobalattie]

So I’m building a new engine, and I was curious as to pushrod length and valve lift vs lobe lift...

In the past, all of my engines used single pattern cams with the same lift intake and exhaust and same rocker ratios, but this new one is gonna be .595 intake lift and .525 exhaust lift..

The lobes are only .370/.360 but the rocker ratios are 1.65 and 1.5...

This is a 2bbl circle track application with 351n heads so that’s why the exhaust side is what it is... I’m hoping it works out really well

[jed]

Yes be sure and chech that the push rod length is correct. if I rember those 351 heads were non adjustable rockers.

[bobalattie]

Ford racing N351 heads, 7/16 studs with adjustable rockers..

[77cruiser]

You could easily end up with different P/R lengths for In & Ex. Did on my SBC similar 1.65 & 1.5 .356 & .341.

[Steve.k]

Bobalattie from the different lifts per lobe shouldn't affect the length. With the inline layout of valves usually always the same. Rocker ratio or different styles of rockers may change that. Otherwise same. Double check you rocker sweep and see how she looks.