eric01ss

iTrader: (13)

are they all the same length?

hammertime

iTrader: (1)

LS1 and LS6 engines use the exact same length pushrods.

LS6 engines have a taller valve to make up for a smaller base circle on the cam.

408 z28

iTrader: (1)

not trying to thread jack but if the ls6 has taller valves to make up for the smaller base circle than what size pushrods would you need to run a ls6 cam in a ls1 motor?

Thanks

kenp

iTrader: (9)

All things being equal, to keep the same lifter preload, you would need a slightly longer pushrod. You will find that if you do a search on the zo6 cam, lots of people have installed them in their LS1 with oem length pushrods. You will also find the difference in the valve stem heights. I can't remember what it is right off hand.

oange ss

iTrader: (50)

6mm = .0236

Smitty's '04 GTO

iTrader: (5)

Stock pushrod length in LS1 and LS6's are 7.400. The hollow-stem ZO6 valves are .6mm longer which is about .0236; divide that by the 1.7 ratio of the rockers and you get approx .014 that you need to add to a pushrod length to run ZO6 cam in an LS1. Since they are only available in + or - .025 increments, 7.425 would be a good length.

Or, you could use a length checker to verify...

408 z28

iTrader: (1)

thanks guys...i did some research and gm says to use a 7.450 pushrod