I ran into a friend of mine today, he asked me if it was safe to run buddy club III cams on a stock GSR with stock block, portflow inner valves springs, itr outer springs and stock GRS retainers. I searched and couldn't find a definite answer as to the whole portflow inner and itr outer springs, what's the deal w/ the yellow itr springs, which is better intake or exhuast springs from itr, and are itr retainers stronger than GSR? Thanks for the info!!!

 

any info?

 

I WILL WORK but you need to use the itr intake outters and the portflow inner on both sides.

 

u dont necessarily need valvetrain upgrade for those stage 1 cams... it doesnt make power much up top ne ways.. no need to shift beyond 8 with those.

 

I know they are stage 1 cams but lately i've seen dyno graphs with guys making power to 8500 rpm pulling like stage 2 cams. If i took my car to 8500 rpm on stock valve springs i would be shitting my pants hoping not to drop a valve. I would think it would be best have the extra protection with the itr and portflow valve springs, but what about the retainers, are titanium really needed for bc3 cams?

 

If you are running the ITR/CTR valvetrain ON BOTH SIDES of the head, you can get away with OE valvetrain with the BC3+ cams. You can run the BC3+ cams with the lower model VTEC heads as well. I personally have been running the BC3+ cams on my stock ITR valvetrain and would recommend it to my good friends. I WOULD NOT recommend though, running the BC3+ cams on stock GSR or B16A valvetrain. The BC3+'s are slightly bigger than the CTR cams, which is why I am willing to run them on stock type r valvetrain. The Type R engines however, come with DUAL VALVESPRINGS on both the intake and exhaust sides of the head...there has to be a reason why they threw in an extra set of inner's...

 

So then there's really no need for titanium retainers and portflow inners w/ bc3 cams? As long as you got ITR dual valvespings?

 

no

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by all-mtr-teg &raquo;</TD></TR><TR><TD CLASS="quote">So then there's really no need for titanium retainers and portflow inners w/ bc3 cams? As long as you got ITR dual valvespings?</TD></TR></TABLE>

Depends upon who you ask and how ballsy you are. Keep in mind, even upgraded valvetrain has been known to fail before. I was told by my tuner, who I trust, that I could get away with running my BC3+'s with my stock valvetrain (ITR). K@tman used to run BC3+'s also, with ITR valvetrain. If you don't already have type R valvetrain, you might as well skip straight to portflow inners, with ITR outters.

 

i dont really see why you would risk your motor running itr springs, rather than not being cheap and upgrading the springs and retainers to something that is proven to handle the cams and saving your motor

 

because if BC3 aren't that much more aggressive than stock itr, the itr springs and stock retainers should be able to handle them. I heard a lot of talk about titanium retainers going bad sooner than stock retainers, which is why my friend decided not to install his rocket valvesprings and retainers since its his daily driver. Instead, he's saving those for his soon to be drag car.

 

Too many people preach the mantra of simply throwing an upgraded valvetrain in there with any cam upgrade. Which I agree, you should upgrade your valvetrain, but there is a right valvetrain for the right cam. I would definately suggest running some much stiffer valvetrain for something like BC4+'s, Skunk2 S2, Skunk2 Pro1, Toda B's, Crower Stage 2's. However, seeing as the profiles for the CTR's and BC3+'s aren't too far off from one another, why would one want to throw on some h3lla mad stiff valvesprings for them? What does that do? Wears down the lobes on the cams faster as well as putting more stress on the timing belt. Race valvetrain for race cams. Sport level valvesprings for sport type cams, and stock valvetrain for non-aggressive cams.

 

Is $80 for ITR inner and outter springs a good deal? I haven't found anywhere cheaper than $80 on ebay. Know of any shops or sites?

 

What springs should I run for my BC 4's?? What about retainers? I have a stock GSR. I was thinking supertech's

 

Aren't BC 4 too aggressive for a stock GSR?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by all-mtr-teg &raquo;</TD></TR><TR><TD CLASS="quote">Aren't BC 4 too aggressive for a stock GSR?</TD></TR></TABLE>

It wouldn't hurt to have more comp, but they are still worth using on a GSR block just because of the displacement.