yellowturbo

Ok my head is ported by a pretty good guy who know what he is doing so my flow number will be pretty good. I have Crower spring and retainer kit and Supertech .5mm oversized valves.... with a SC50 .63 ar turbo... my head is from a D16Z6 .

Now, I want to get my rpm to 8500 to get the full potential of my turbo, my engine can support it but :

The question is : stock cam or aftermarket cam and which one, Skunk 2, ... ?

Some people say that the porting is the key to rev higher other one said is the cam ...

Can someone could explain me this theory because I need to know if I should get a cam or no I am rebuilding my head next week my block is ready ??? Pleaaase

SpiritUnreal

The stock cam should be fine. However, ZEX makes a nice cam for turbo SOHC.

The other question, there's alot more to it then the head for high revving, rod/stroke blah blah blah. You could find your answer in the Tech forum. It's too early for me to go into detail. But, what you've got the springs and retainers, oversized valves should be fine. Just don't stay up that high for all too long.

Not sure how much power you'll be making that high though.

yellowturbo

thanks ! I need more opinions ....

blackeg

ive also seen/heard some good things about the 59300 and forced induction, however i dont think that cam goes much above 7800rpms. honestly man- 8500rpm on that motor is so much stress, even when built. the zex cam at 7800-8000 should be more than enough. even at that, i wouldnt stay/ go to 8000 much at all...jjust my opinion

yellowturbo

mmmh ok I think that 8000 will be ok for my engine... its a daily driver...

thats why I posted all my idea... now I just see what other people think about...

yellowturbo

did you have a link to the Zex cam to see the specs ?

USDM 4G VTEC

i say ZEX(COMP CAM smae company) the 59300
i got it and love it
i would say even while built dont over rev past 7800.... no need... remember even tho u built a head to flow that high, if the bottom end is not prepared is going to blow like a bomb

yellowturbo

my bottom is well built too, Eagle rod, CP pistons, Sleeved etc... even with all this you think that rev over the original limit ?

yellowturbo

could be fatal ( sorry I forgot the end loll )

USDM 4G VTEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yellowturbo &raquo;</TD></TR><TR><TD CLASS="quote">my bottom is well built too, Eagle rod, CP pistons, Sleeved etc... even with all this you think that rev over the original limit ?</TD></TR></TABLE>
my motor is also built... eagle rods, JE pistons, bored over, balanced crank etc... and i WILL NOT over rev it
if u feel confident i will say 7800 and thats it no more

if u rev more than that you are going to be asking for trouble

yellowturbo

mmm ok thanks dude !