Kelford 272's vs FP-4R's on a IX
#1
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!
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!
#5
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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/h54/o-townFLA/Evo/MattDennison.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
![](http://i61.photobucket.com/albums/h54/o-townFLA/Evo/MattDennison.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
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#9
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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!
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!
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#13
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?
Last edited by Svendiesel; Mar 21, 2010 at 11:16 PM.
#14
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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
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