3.4 head work gains

[CamaroL32]

How much of a gain would be seen from porting and polishing the heads & intake, and running 1.6 roller tipped rockers? How about with a 3 angle valve job? All of this on the stock cam.

Will the roller tipped rockers hit the valve covers or just the full roller rockers?

I have a 3.4. Current mods are intake and cat back.

Thanks for any help or advice.

[viper98885]

Just a port and polish job will not show too much gain. If you do a cam at the same time, you will tell very noticable gains. Neither the roller tipped rocker arms or the full rollers will hit your valve covers.

[Tiago]

I had that setup for a long time, and I saw a good gain, but it can be even better with a cam ;)

[CamaroL32]

Tiago, did you have a valve job with that or just port and polish, which rockers?

[Tiago]

I have everything, valve job, full port and full roller gold series crane 1.6 ratio rockers...

[CartmanSS]

CamaroL32: If you're gonna do port/polish, you might as well get a new cam. All the neccesary parts will be pulled off, making a cam install a whole lot easier [img]smile.gif[/img]

[black34v6]

partly right -- the fact that MOST of the necessary hardware will be off (to put a cam in while the engine is in the engine bay, also requires removal of at least the radiator (to fit it in front of the block)) -- but also that, in getting heads, you wont fully realize their airflow potential without a cam and good exhaust/intake system.

porting/polishing the heads will simply no longer make them an obstacle to airflow. but -- airflow is cutback by the most restrictive part.

Tiago got heads yes, but he also got headers, and a ported/gasket-matched intake and a LT1 TB. lots of boost of airflow going in and out.

while a cam would fully realize the heads airflow potential, the fact that he has the intake and heads and headers and exhaust all together, makes it work that much better.

-R

[Harbin1]

Hey Russel, how bout that website? I couldn't get it to pull up.

I'm looking at doing all this stuff to my car this spring. I'm going off to grad school next fall so I want to be sure my car will last me another 5 or so years. I'm sitting on 127,000 miles right now!! I'm wanting to rebuild, so why not upgrade a little!