Roker Arms, Camshafts, and Pushrods

[FieroNelson]

I'm building a Camaro 3.4L with a Crane H-272 cam hydraulic flat-tappet lifters, and full roller aluminum 1.6 Ratio rocker arms.

My question is this: Am I going to need to get some kind of special push rods or anything else because I went with 1.6r rockers instead of 1.52? Or should it all go together without any issues? I'm getting help from an engine builder, but I just want to know if I need anything special to use the 1.6r rocker arms before we jump in.

Thanks!

[SappySE107]

The cam and rocker change will probably require new pushrods to have the right preload/geometry.

[fivepointhustla]

No many have run stock length, but get the comp cams pushrods as they are stronger. Many say high ratio rocker arms put added stress on the valvetrain and that you should get all the lift you want from the cam. Delta cams will make a cam for half the price of the 272 if you chose that route. Just letting you know the options.

[SappySE107]

Has anyone here used a delta cam?

[geoffinbc]

Guys over on S-series have and they love them.

[Superdave]

the H272 is dirt cheap on Summit... the kit is only like $130...

[fivepointhustla]

Gotta check summit more often, it is $200 just for the cam. http://store.summitracing.com/partde...&autoview=skuI

Alot of the guys on fiero.nl that have 4.9s got to Delta and they all have no bad comments yet. Their customer service seems sweet everytime I call.

[Superdave]

Gotta check summit more often, it is $200 just for the cam. http://store.summitracing.com/partde...&autoview=skuI

Alot of the guys on fiero.nl that have 4.9s got to Delta and they all have no bad comments yet. Their customer service seems sweet everytime I call.

Wow, went up from last time...

Either way, i just had Delta do my 3500 cam. they were great about it, once they recieved the core they had it ground and out the door in a day. Very friendly as well!