Help What size pushrods do I ues

[Dirty Dees]

What size pushrods do I need for a gx160 with a 275 cam and 1.2 billet rockers

 

[delray]

that would depend on how much you mill off your head and the thickness of your head gasket.
these too will help you.

 

[ole4]

Are your rockers fixed pedestal roller rockers like the Gage in the above video or ball stud non roller rockers? The video above is for fixed pedastal rollers so If yours are not that then it does not depend on pedestal height. Pushrod length alone sets geometry. You have to check the geometry but depending on the type of rocker it may be ok to use the stock pushrods but you still need to check. Why dont you post a picture of what you have.

 

[Dirty Dees]

Are your rockers fixed pedestal roller rockers like the Gage in the above video or ball stud non roller rockers? The video above is for fixed pedastal rollers so If yours are not that then it does not depend on pedestal height. Pushrod length alone sets geometry. You have to check the geometry but depending on the type of rocker it may be ok to use the stock pushrods but you still need to check. Why dont you post a picture of what you have.

It's a stock

 

[ole4]

So it’s the steel billet nr rockers? Start with stock pushrods check mid lift geometry and if ok your done.

 

[ole4]

are these the ones you have?

 

[delray]

like ole4 said earlier, we need pictures of your parts. also on a different note with 275 lift and 1.2 ratio that will put you at 330 lift so you will need about a 36 pound spring. also sometimes how aggressive the cam can dictate less or more valve spring rate. 36 will get you in the pall park.