i want you buy skunk2 cams but don't want to change my valvetrain and springs which is the one i have to buy


and whats the diference between them?


i have a 1993 gsr head with a b20 block and gsr lsd tranny and when i race i can rev up to 9000 rpm but i think my top end power is between 8000 and 8300 rpm

so when i race i shift at 8000 rpm i feel like i get the most out of each gear at 8000 rpm

any help will be apreciate thanks for you help

 

well stage 1 you don't neccesarily need to upgrade the vavletrain(allthough it is recommended) and it keeps everything at stock(idle).
stage 2 is for modified engines and higher rpms. the stage 2's also have a higher lift and duration than the stage 1's

 

If you dont want to change your valvetrain then go with the stage 1's. Stage 2's you need to because they are more severe.

 

You're decision also depends on what compression ration you're running, to make the most out of the more aggressive skunk2 stageII a bump in compression ratio is a good idea, and as stated before, stage II definiatley needs a valve train upgrade, and you should at least use ITR springs and retainers even if you go with the stage I, although most people say it's not "necessary", it's definately a good idea and will reduce wear and increase reliability in the long run.

 

The above posts are pretty much correct.

Your going to definately need to raise your compression or you will be overcamming your motor. Other supporting mods will really depict what type of power increase you get from the cams. Also, tuning is huge with high lift cams.

It all depends on what you plan to run for compression and what the rest of your setup is.