Advice On Cam Selection For R34gtt

[ssslpr]

Hey ppl. just looking at getting some cams for my skyline. (r34GTT). just wondering what cam best suits my application? ive searched the forums already and come up with not much at all. Bass junky advised on the Tomei pon cam type A. just wanted other opinions on this and if cam gears would be neccessary or a good addition?both IN and EX? and also good upgraded set of brake pads.

my car currently has Turbo back exhaust, ARC front mount, when cams are bought ARC airbox/ shroud will be coming also, power FC, profec B spec II(for sale if anyone's interested) and will probably be high flowing standard turbine rather then upgrading.

Any info will be greately appreciated.

cheers

Maurice

Edited February 16, 2006 by ssslpr

[Abo Bob]

Don't bother with cams unless/until you are upgrading the turbo.

The Tomei Poncam type B 260/260 are the best for my money although I don't know anyone with an R34 and the Type A. Put it this way, they don't destroy your idle or reduce driveability much so why not go as big as possible?

They are still street cams when it comes down to it, Tomei make the Procams for more full on situations.

I have 255 rwkw with a GCG highflow at 0.9 bar and these cams.

I don't think the cam gears are worth getting although if you want you can sacrifice some idle smoothness for early boost with stock turbo. I think this would equate to top end losses with bigger turbo.

[ssslpr]

i was told that the type A with a standard highflowed turbo woudl result in better response rather than the larger 260 which is more suited to an upgraded. i was told i would get the same power with these cames and highflow turbo?? hmmmm. sounds like more resaerch is needed. what about other brands?? anyone have any testimonials or heard anythign about other brands??

thanks for the input ABO.

[gtst93]

stay with your standard cams and just get some adjustable cam gears.

[Abo Bob]

Don't do that. They don't help R34's. It's been tested and proven.

[Wink]

Don't do that.  They don't help R34's.  It's been tested and proven.

<{POST_SNAPBACK}>

What about R33s?

Been thinking about replacing my gears when I do the timing belt.

Edit: did search, found info

[Bass Junky]

Adj Cam Gears DO NOT WORK with R34 GTTs

It cost me about $750 to find this out.

DO NOT DO IT. My Poncams are both on 0 degress.

[Abo Bob]

Listen to Bass Junky.

[satanic]

Just out of question, how much do a new set of these Poncams cost

*damn mod bug, can't kill it for some reason*

[Bass Junky]

Call it $1000 delivered

about $400 to fit

may as well do some other servicing work whilst the top is off

I did my Major service at the same time.

[satanic]

Well installation won't be an issue.... so it's just the cost of the part + delivery for me

Question for Bass and Abo; on a scale of 10, how would you rate this upgrade in terms of bang for buck? I know both of you probably did a whole lot of other stuff at the same time, but give it your best opinion

Cheers guys

S

[Bass Junky]

hmmmmm

well, I need to see the graph of an R34 GTT with highflow, but not cams

or even an R33 GTS-T with high flow but no cams, and then I can tell ya

[Bass Junky]

Here we go

Tango made 240 rwkw with virtually the same mods as me, but no cams.

Here's his graph.

[Bass Junky]

This is mine with cams.

also check out ImpulR33R graph. starts nosing over at like 6000rpm without the cams.

Impul_R33R.bmp

[satanic]

So cams got you an extra 10kw... $100 per kw, not bad at all

I'm sure it would've done something else as well, like improve the drive in some way or another?

[jmac]

I have very similar mods to Bass Junky too except for cams. Made 226rwkw on the initial tune, now making about 10-15rwkw more with boost control kit and Z32 AFM, call it 235-240rwkw.

Cams will be the next step for me, but they certainly weren't a priority. 10rwkw is probably a good "figure".

[Bass Junky]

It's not just the extra 10kw.

I'm making over 240 rwkw for over 1500rpm.

It's a big fatr curve.

The stock cams fall over at 6000rpm.

the poncams are on song at 4500 right through to 8000.

See how flat the torque curve is?

[Abo Bob]

I had 228rwkw without cams then rebuilt the engine with slightly lower compression ratio and put the cams in. Same boost got me 255rwkw.

That's 27rwkw gain from cams and fresh engine.

[ssslpr]

are both bass junky and Mr Abo both running same boost??

[Abo Bob]

Pretty much yes but I have an auto and he has a manual. Also my comrpession ratio is 8.75:1 and his is 9:1.