The Cosworth M2's are actually slightly more aggressive than the Kelford 272's on paper, and I've personally seen better results on the IX's with the Cosis vs. Kelfords. The FP4R's are still my top choice though. You can get away with using the stock valve springs on all three of these choices as long as you don't raise the stock rev-limiter (I have mine set at 7600 on the FP4R's). GSC S1's are also a great choice for the stock turbo; if you look at their specs they're a lot like a toned down version of the FP4R's and would be a good choice if you want to keep a smoother idle and better low speed drivability. The GSC S2's are also good cams, but you will need aftermarket valve springs with these.

Also, if you like the Fidanza 3.2 (great street clutch BTW), take a look at the Competition Stage 3. It also utilizes Kevlar friction material, but its a full disc instead of 6-puck (Fidanza recently changed the 3.2 to a 6 instead of 4-puck design) and a few hundred cheaper. I'm on the Comp Stage 3 and Comp 10.8 lb flywheel.

 

Only if you don't know how to properly tune the MIVEC map

 

GSC, Cosworth, and Kelford MIVEC intake cams have snapped. HKS and FP have not. Supposedly this snapping issue has been fixed with some stronger billets, but it may be too early to know for certain since nobody has logged a lot of miles/abuse on these new ones.

There are a lot of great cam choices on the market so my best advice to you is read everyone's advice, plus dig deeper and look at the specs of all the individual camshafts, learn what it all means, and figure out exactly what you're looking for and what will best fit your setup.

 

gsc's ftw

 

it all depends on the route your going to go. if your staying on the stock turbo....then an ACT street disc with an extreme or heavy duty pressure plate

or an ACT 6 puck is better then a 4 puck.....4 puck is insane!!!

and 6 puck it rated to some pretty high trourqe.

but if your doing a Red......i would do an Exedy twin disc right from the start




goodluck man

Dom

 

I ran the kelford cams on a 35r car with stock ECU and AEM it was great... I never had them in a stock turbo car but ive seen people with them on a stock turbo and they have no problems at all.

 

i'm ready to buy just need to know if i should go with 264/270 or 272/272 with the stock turbo? should i get cam gears also?

 

Assuming you're talking about Kelfords, 272/272. I personally spoke with Kelford and they recommend the 272/272 combo when trying to max out the stock turbo.

 

There is a huge difference between ACT puck discs and the Fidanza pucks. The Fidanza 4-puck was their street clutch; very smooth engagement, didn't chatter, near stock pedal pressure, etc. They've since revised that into a 6-puck though for better life and they claim more holding power. Both use Kevlar friction material and a pressure plate with near stock pedal pressure. Both also have far smoother engagement than an ACT sprung 6-puck.

 

^^ thanks

 

i have about $2k give or take to spend on mods. i need a clutch

my mods are below, how do you think i should spend my money

 

most reliable cams i belive are Cosworth, they have proven themselves over and over around the community

 

The issue i believe was only a batch, that being said the kelfords have since then switched their cores to stronger ones....

To the OP I've felt gains and better response when I switched from GSC S2's to Kelford 272's in the same day...didn't dyno it but when i drove it the power was better and smother in the Kelfords.

 

if i get the 272/272 do i need to get Spring and Retainer????

thanks for the help everyone!!

 

If you retain your stock rev limiter, no, if you want to rev beyond 8,000 RPM, then yes. I personally feel 7,600 is a "safe" rev limit on an aggressive cam (Cosworth M2, Kelford 272, FP4R, etc.) with stock valve springs. If your head will be off for porting, head gasket job, or whatever else, then you might as well do the springs. If the head is staying on though and you want an easy drop-in affair then keep the stock springs. Don't forget to bleed your lifters!