i have a set of these cams sitting in my room and i am contemplating on putting them in. only thing im really worried about is my piston to valve clearance. my head is fully treated by portflow w/ valvetrain and it was milled .030. i have stock block (JDM SiR-G) P72-00 pistons. will their be any clearance issues? i really cant afford the down time to clay the engine, so if anyone might kno, your help would be appriciated TIA

 

are you abso-fuken-lutely sure? have you tried a similar setup b4? anyone else?? thanks

 

Hmm. I was going to say clay your engine to be sure, but then I finished reading your post. I would imagine there should be no clearance issues if you leave the cams at 0. Once you start moving the gears you move into unknown territory. However, I would really try to find a way to make time to clay the motor if I were you.. better safe than sorry, right? Have you tried asking Skunk2 directly about this?

Sorry I couldn't be of more assistance

 

there have been alot of guys that have used those cams and have
had issues with them. skunk told me in an email that the B18C engine's
tolerances are close as it is for the stage 2 cams. with the JDM pistons,
I am guessing you are cutting it even closer... your head gasket of
choice would definately be stock... also if you adjust the cams at all
you could be in for a valve bending incident. I would sell the cams
and go for the stage 1 setup. if you have never used them, you can
trade up and you will still see excellent results on those cams and
you will be able to tune them with more confidence. it all depends on the
valvetrain components you select and how high you rev the motor
also...


[Modified by MikeSarr_GSR, 4:43 PM 10/7/2002]

 

Do it right the first time: Clay the motor.

It doesn't really take that long, if you got all the tools 1 day maybe 2 if you work slow. http://www.c-speedracing.com good article in the How-to section.

 

Dude , dig it , if you dont have the time to clay you motor ( due to work or something ) and you put in the cams and start up and your pistons and valves become one unit you will be out alot of money to rebuild .

if i were you i'd call in sick or something one day and use that day to sort out the car ( that is what i did ) .

if you clay the motor and there is a clearance issue and you can't afford the money for aftermarket units . Borrow a dremel and widen/deepen the valve reliefs in the pistons a bit ( also what i did ) .

The motor never gave me any trouble !! i sold it and now am building a crvtec .

 

Just wondering, what are your mods to run a 13.3?

 

Who do you mean ?

 

clay it and do it right... you don't have the time to clay but you would ask us clowns if your motor has enough clearance... sure hope we're not wrong or you'll need time to rebuild a motor or worse... no one knows if you are going to have a problem or not, that's why if you did a search for clearance issues and how to figure out this kind of problem you'll see a hundred guys who are tellin you to clay the motor and know for sure... how much money have you got in it so far? i wouldn't start half assing now...

 

My friend's type-r is running skunk stage 2's cams with a milled head .030 and using a 2layer headgasket it runs fine no problems at all........

 

what rev limit did he decide was safe to approach with that setup?
I am also curious about his mid and peak whp numbers, thanks
in advance

 

A favorite quote of mine... "Everyone always has the time and money to do it right the second time"

 

9500rpm............with portflow inner valve springs and itr outters.

 

i guess you guys are right about claying it...damn shoulda never milled my head...oh well...live and learn i guess..

 

a girl in our car club has a usdm gsr with crower stage 3 and milled .02 and hasnt had any problems, but id go the safe route personally breaking **** is more expensive than doing it right

derek

 

damn skippy check it out first... did you know your dynamic compression will DECREASE with those cams on your CR? you may have more peak whp but you may end up with a slower car. change the pistons to JDM ITR and you will be in the proper static compression range for that intake valve closing spec.



[Modified by MikeSarr_GSR, 7:43 PM 10/8/2002]

 

This is an excellent question.

I'm going to be running a JDM GSR with Skunk2 Stage 2s and Wiseco 11.8:1 Compression pistons.

Do you think will I have any clearance issues?

 

the valve reliefs are deeper, I would use a stock HG and not worry a bit.
go for the arp head studs for your 12:1+static CR and you should be fine
from what I hear, the stock piston valve reliefs on the B18C1 is the problem