Searched but still need answers. I have a ported and polished gsr head and i want to install my adj cam gears, sk st2 cams, springs, flat face valves and titanium retainers. It will be dyno tuned the bottom end is stock until i do a build I want to rev it to about 9000. The head has been milled .030 over compression should be 11.
I also have a 1 layer head gasket will i have enough clearnce with the cams? Should I use a stock 3 layer or thicker then stock? Do I have to degree the cams?

 

whats in your bottom end we dont know your compression or even piston choice?

 

Stock gsr bottom end gsr head is milled .030 over compression should be 11.3 with flat valves.

 

Just by my rough compression calculation, you'll be close to 11.5:1 (not above) which is plenty for those cams to work well. When you eventually rebuild the bottom end, only do it if it's required since changing those pistions will increase your already high ratio. You'll need to advance both cam gears between 1-2 cam degrees (not crank) just to compensate for the milled head and the 1 layer head gasket combination. This will effectively "zero" out your cams and give you a starting point to tune your cams/car for max power on the dyno. Make no mistake, you should be using some sort of tuning system like Hondata or Chrome etc and plan on having it tuned properly if you want it to work right. Forget about wanting it to rev to 9000 rpm....a motor will make power where it does, as long as it does and then drop off. If it stops making power at 8500 rpm, reving it to 9000 will only impress your buddies and not make the car go any faster. Clearance should be fine as long as everything you said is accurate, if in doubt, check it.