Let me know what you guys think about this? Should I do it or not?

 

of course.
ctr camshafts in a GSR motor?
thats a great setup, many here have it, I did it too.
you should think about other things to get even more power out of the cams, like fuel pressure regulator, ecu tuning or chipped ecu, vafc and the usual I/H/E setup... but even dropping them in will give you a good horsepower bump, maybe 10 ponies.

dyno tuning these with adj. camgears will be best but not necessary.

 

with stock internals how much can i rev up to?

 

i say for safety's and longevity's sake, keep it below 8.1k rpm and don't hold it there for extended time periods. you don't want to start floating valves on a nice head. HTH

 

I highly recommend puting ctr valve springs too, so you would have valve float problem.

 

This might sound pretty hard to believe but my buddy had a 01 GSR with CTR intake cam, i/h/e, fuel pump, cam gears. His dyno jumped him 22 whp. I was amazed. Its a lot. Im not sure if they just had a really bad dyno run when they first dynoed it stock. but either way you could FEEL and HEAR the difference in the cam.

 

the limiting factor for revving your stock motor is the valvepsrings... then the rods and thridly the remaining rotating assemblies/parts.

so if you can spend loot on a set of valvesprings, like JUN/TODA/Skunk2/SPOON, etc then you can go up to 9500 rpm easily, and it seems liek CTR cams dont make power past that... if even up past 9000.

ever check out http://www.importreview.com ? =

 

The stock GSR exhaust springs are no good for any profile bigger than the stock cam. However, the GSR intake & ITR exhaust springs are the same, (if I remember correctly), so since you'll need better springs for the exhaust anyway, you should just get ITR intake springs & move your GSR intake springs to the exhaust side. That will allow you to bump your redline up a bit to... to... damn, I can't remember the R's rev limit, but that's where you could bump it to.