Car: g35 coupe
Year: 2003
I am puting in a twin turbo greddy want to put a little more in the head. just for reforcement. I am going to use stock valve and stock cams.


What is better for my application?

JWT VQ35DE Valve Springs & Shim Kit VS Brian Crower springs / retainer kit


Also can any one explain why ones has shim and one doesn't? yes that a good thing or bad or each?

Also should i get this

Z1 Viton Valve Stem Seals Supposely they are stronger? any buddy use them in their engine build

 

why do you need stronger valve springs with stock cam?

 

why would you waste the time and money putting any of that stuff in and not change the cams? do you have any idea how hard it is to take the head apart?

 

A shim is use when your valve spring has shrunk. You put the shim between the head and spring to bring back the spring height and tension. So you mostly on use shims engine's with some wear.

 

i am ripping out the engine and it is going to be taken apart reason is b/c i have major tick noises in head. Would you just recomend change just the shims? should the spring and shim kit fix my ticking?

 

I suggest ig you are messing with the heads get some cams while you are in there

 

are you sure its in the head? knock travels very well through an engine.

 

i am getting the bottom end done too

 

i am worried about cams tho. what one would you suggest then with a turbo setup

 

If your going to put new shims. Making sure you use the right thickness to bring the spring back to spec.

 

I drove my 04 sedan (same exact motor) with a Greddy TT for a year before building the motor for more power.

If you are going to take off the heads just get new cams and do a valve job. But if you are going that far just build the bottom end too.

 

all depends on what your goals are.

alot of people use the brian crower stage 2s

I personally run the GTM turbo cams and have no problems