i have a built b20vtec with rs machine pistons c/r around 12.5. i got a set of pro3s that i wana put in it but i dont wana bend vavles. the head was plained 12 thousands. i kno wat i can do..i could lock vtec in and check it like that or clay the motor(wat i should do). but i was wondering if ne1 was runing the same pistons and cams or kno sum1 that is so i dont have 2 do this...thanks!!!

 

If you're asking a question like this, I highly doubt Pro3s are the cam you should be going with. Those are BIG cams. Skunk2 used to only sell those to a SELECT few builders b/c of just this problem....i.e. if you don't really know what you're doing, you'll f*ck some $hit up!

Those are not the cams to be making assumptions and guesses about before you run them in your engine!

Don't 1/2 *** it. If you have questions, CLAY THE ENGINE!

 

The only way to be certain is the measure valve-to-valve clearances, and piston-to-valve clearances. You can also 'clay' the motor.

With ~0.012" off the head, safe settings would be +5 Exhaust, 0 Intake.

I am running Pro-3's with CP 12:1 pistons and ~0.010" off the deck height. Cam timing set at +4 E, -1 I.

 

92typer, wasn't your cam timing set at +5 Ex, +1 In the last time you did the cam dyno comparisons? Did you find more power with the current settings?

 

I have not been back to the dyno with the new settings. I finally moon-cut my valvecover so I can actually do cam timing tuning on the dyno. Should be within the next month or two.

 

yea thats wat i was thinking...thanks 92typer i do kno0 wat i am doing but dont really want take the head off....cuz if i do that im goin like 14 c/r...but i jus wanted 2 c wat power it would make now and maybe id jus be happy w that....