2.4L cam choices

[TSi_with_psi]

I'm planning on running either the FP3 or FP3x cams in my 2.3L. I have a ported head from BJ's Cylinder heads and 1mm oversize valves with crower springs and retainers. I'm only planning to rev to 7500rpm. do you think i will need stiffer springs? or should i run fp3's with what ive got?

 

[red97gsx]

I just got my 2.3 running about 2 weeks ago and i have BC 280's in it. I am just breaking it in now. Will let you know as soon as i dyno it and post results. So far i really like them.

 

[jpbrazill]

Well, its been about a year now. I went with the BC 280s. Dyno results will soon follow. Let me just say this, with the 101200s...I could barely tell I had aftermarket cams in. With the BC 280s.........there is no question. The neighbor next door asked me what was wrong with the car...haha!

 

[Slippi84]

I have a question about the fp2x vs the fp3x cams. I know from when monster first got his cams he said he saw faster spool than his stockers and more top end than fp2's, but what about strokers? Do you guys think that fp2x's would actually be better or fp3x's for a stroker only looking to rev with a 8k rev limit? The way I saw it the quicker spool of the fp2x's would be better because like it has been said you can dial in a little more duration/overlap and have a wider more useable power band with quicker spool with the fp2x's.

 

[dsm-onster]

The fp3x cams have the same duration as the fp2x cams fp2 cams and fp3 cams.

The fp2x cams cam be tweeked so that they have the same valve timing as fp3 cams by altering the cam timing (lobe centerline angles). Fp3 cams are a better choice for strokers than fp2x cams when installed straight up (no cam timing changes). But if you buy a set of fp2x cams for your 2.0L you can upgrade to a stroker later and have what the fp3 offers because the fp2x cams have identical ramp rate and lift and duration to the fp3s. You'll just need to buy ONE adjustable cam gear for the exhaust and retard it 3-5 degrees to turn fp2x cams into more stroker-friendly fp3 cams.

Fp3x cams are better still for strokers because the have been designed for the stroker in mind (different lobe centerline angles than fp2 and fp2x and fp1 and fp1x) but they have more lift than the fp3 and fp2x cams and a VERY slightly more aggresive ramp rate.

And as my memory searves me with my setup changes over the years. I gained a faster spool with the bigger 60-1 turbo with the fp2x cams, but I noticed quite a drop in spool speed with the small 16g and 18g: both of those had unclipped tdo5h turbine wheels and 7cm^2 turbine housings.

 

[Slippi84]

The fp3x cams have the same duration as the fp2x cams fp2 cams and fp3 cams.

The fp2x cams cam be tweeked so that they have the same valve timing as fp3 cams by altering the cam timing (lobe centerline angles). Fp3 cams are a better choice for strokers than fp2x cams when installed straight up (no cam timing changes). But if you buy a set of fp2x cams for your 2.0L you can upgrade to a stroker later and have what the fp3 offers because the fp2x cams have identical ramp rate and lift and duration to the fp3s. You'll just need to buy ONE adjustable cam gear for the exhaust and retard it 3-5 degrees to turn fp2x cams into more stroker-friendly fp3 cams.

Fp3x cams are better still for strokers because the have been designed for the stroker in mind (different lobe centerline angles than fp2 and fp2x and fp1 and fp1x) but they have more lift than the fp3 and fp2x cams and a VERY slightly more aggresive ramp rate.

And as my memory searves me with my setup changes over the years. I gained a faster spool with the bigger 60-1 turbo with the fp2x cams, but I noticed quite a drop in spool speed with the small 16g and 18g: both of those had unclipped tdo5h turbine wheels and 7cm^2 turbine housings.

So fp3x's the way to go with a stroker with 8k rev limit over fp2x's even after the exhaust cam retarding?

 

[dsm-onster]

They have more lift than fp2x cams with very slightly more ramp rate, so yea.

 

[Slippi84]

Get this I talked with FP direct didn't catch the guys name but he actualy said he doesn't really even reccomend the fp3x's anymore because they are hard to setup and because they are such a aggressive cam that they really don't make a stronge enough spring for the 4g63WTFWTFWTF I'm not gonna call them out but there has been plenty of people to run fp3x's with dual springs setups and have been fine now all of sudden aka they have fp4r and fr5r cams they don't think that the 3x is tame for any spring out there.

Anyway to the point of my post I was looking at supertech springs and saw they had two vesrions. Idk if the set I'm looking at is the normal one that everyone gets because for $10 I have no idea why you would get the weaker spring but here's a link to the sprinsg I want to get for my fp3x's. Anyone running these they call them Supertech Dual spring High pressure?

SuperTech Valve Springs For Mitsibishi 4G63 - Dual High Pressure [SPR-M1007D] - $155.00 : Jay Racing

After looking at Fp page those Beehives they sell are .500"(12.70mm) max lift and the Super Tech High pressure springs are 12.80mm(5.04") so these things are a little better than the ones that FP pushes