i have a set of pr3 pistons and rods I was going to put in my gsr, but I didnt know if the rods were a difference length and if I should use my gsr rods or those. Also the head was built with low comp valves and I wasnt sure if they were going to make a big impact on doing a mild n/a build. Any help is appreciated thanks.

 

what happened when you did a search under "rod lengths"?

Low compression valves? do you mean stock valves? They're fine in any build you'll ever do.

 

just use the pistons, i dont think you like the results with pr3 rods in gsr block

 

Gsr rods and P30 pistons in a GSR block = about 11.5:1 CR
Flat faced valves = .2 - .3 bump in CR
Mill head 0.030 and add another .2 - .3 maybe.

Then get really big cams like buddy club spec IV's

 

what flat faced valves add .2-.3 CR. When i spoke to a rep at Supertech he only told me they bump of CR .08. I calculated my CR off of a .08 bump

 

Everything I have found about the supertech flatfaced valves gave me a .2 - .3 bump.

If its only a .08 then I need to remove a layer off my headgasket.

 

cc's the head after the installation of the valves... VOILA u got a perfect way to determine compression... at least of impact of the valves on comp.

 

I had the combustion chambers touched as well so that may lower cc's a little more.

Either way good info.

 

imma do the pr3 with a gsr built tell me how it comes out and does any one know the highest hp on the same rod piston combo stock bore.