Kelford 272's vs FP-4R's on a IX
 

Im planning on doing an FP Black, or more likely a Red, and I currently have HKS 272's. Im going to be swapping the HKS's out for the Kelfords or the FP-4R's and revving to about 7800-7900rpm on the stock block and head. Or to 8500rpm if I do a built Buschur head, yet still on the stock block.

How do the FP-4R's make their power, are they a mid-range cam and fall off up top or is it relatively smooth all the way up? Im pretty sure the general consensus is that the Kelfords make a sick amount of top end power.
From what Ive heard so far, the FP cams suit a IX (mivec) better than the Kelfords, which typically enjoy working in a VIII better, is this accurate? I've also read about phantom knock issues with Kelfords in a IX.

It seems like the obvious thing would be to do the FP cams since I am getting an FP turbo...but Im a bit stuck on my decision. Id appreciate any further guidance in making a selection!

look up the ams cam test. its on here somewhere

Has absoulutely no relevance. The AMS cam test is for viii's only! Honestly those two choices and the s2's are going to perform similiar and I personally don't think your gonna be able to tell the difference anyway.

Here are my mods with Cosworth M2 272 cams on a FP Red... road course track tune on 100 octane, 26psi...

http://i61.photobucket.com/albums/h5...ttDennison.jpg


Engine/Drivetrain Modifications:
-TUNING TECHNOLOGIES dyno tune
-MIL.SPEC 65mm Throttle Body
-MIL.SPEC ported turbo hot-side
-MIL.SPEC R2 version Intake Manifold
-MIL.SPEC ported Exhaust Manifold
-MIL.SPEC ported Invidia o2 housing
-MIL.SPEC 100 cell catalyic conveter
-PROSPORT oil filter adaptor plate
-MISHIMOTO radiator
-MISHIMOTO air diversion plate
-MISHIMOTO silicone radiator hoses
-MISHIMOTO slim fan
-MISHIMOTO thermostat
-AMSOIL fluids
-Synapse Syncronic BOV
-Cosworth 272 M2 camshafts
-ETS 3inch front mount intercooler
-ETS 2.5inch lower IC pipe
-Gruppe-S 3-port solenoid
-Dual map switch for 91/100
-Brian Crower springs and titanium retainers
-AEM short-ram intake
-Megan 3inch TBE
-Walbro 255lph fuel pump
-Precision Turbo Engine 780cc fuel injectors
-ACT heavy duty clutch
-ACT Streetlite flywheel
-ARP head studs
-Road Race Engineering front motor mount
-42 draftdesigns water temp housing
-SUN Auto Hyper Grounding kit
-SUN Auto Hyper Voltage type MR

Ya and the AMS cam test was done on a built motor with an AEM EMS and a few other tidbits. Im tryin to figure out whatll work best on an FP turbo.

I love my S2's, but i do not have a FP turbo....YET!

Love my Kelfords on my Red, although I see good things from the S2's...we'll never really know unless there's a test done.

i will do m3 cosworth if i was u for sure u will love then.:mitsu:

^^^ My Cosworth M3 Intake cam just broke today at a road race event. The cam broke at the oiling holes. There is a design flaw...

Evan Smith

M3s FTL... that seems to be a common problem with them.

from what i have seen S2s> kelford 272s in a 9.

I ran fp4r on my last setup ( stock turbo and 35r) and they ran great, made good power and times for the parts on the car.

Fp5rs are in my car now.

FP FTW!

Fathouse

Hmm, so tell me, what differences do you see between the 4R's and 5R's? The 5R is a cam that makes more top end? Where did the 4R's make their power?

Ok so after reading about the 5R's on FP's site it confirmed what I figured, that the 5R's are a top end power maker. How were the 4R's though?

I just put the engine in over the weekend wit hthe 5r's so no reports as of yet.

The 4r's where great, picked up alot of midrange with the stock turbo, not a ton up top, but the turbo was just out of steam, the car went low 11's@122-123 with the stock evo9 gearing winding out 4th.

On the 35r, the car hit real hard, and pulled past 8500 with no problems. Went low 10's on stock engine, head, maf, ecu etc.

Fathouse

honestly GSC or HKS have always been proven to be reliable and EVERYONE that has run them have nothing but good things to say.