Fp3 and evo springs

[mysticj]

Is it okay to run FP3 cams on the Evo 8/9 valve springs? I'm thinking of running FP2/FP3 but I'm leaning to FP3/FP2.

 

[DSM_PWR]

They would be fine for FP2's but for FP3's i'd recommend using better aftermarkets

FPCam3
This cam is now out of stock

Dual valve springs required. STDuals at 1.500-1.530" installed is required. The first camshaft designed with the 100mm stroke crankshaft in mind. Often referred to as the "square lobe", No valve to piston interference issues, and no retainer to guide interference issues. This is a drop in cam in the sense that no issues with geometry or interference exist. This cam produces very broad power bands in stroker engines, easily consuming all available airflow from 800cfm and larger turbochargers.

 

[mysticj]

As far for the FP3 according to the site, intake side requires a bigger seat pressure for the springs while the exhaust side is recommended not actually required. So I MIGHT get away with Evo springs/retainers.

 

[airmail96]

Would you really want to risk it though?

 

[Rockbmx1]

You should use upgraded springs and retainers. Once you see the lobe profile on the fp3 cams you will understand the need for the upgraded springs.

You could try using the fp upgrade springs for the Evo s&r's too.

 

[dsm-onster]

If you're looking for an affordable option but don't plan on going over 8000rpms, I've done fine with the manley singles with a stock redline with my fp2x cams which have the identical ramp and peak lift and duratation to the fp3s. Fp3s just have different centerline angles favoring the 100mm stroke. I used to take them to 8500rpms, but seeng how much power fell off with my 1g intake manifold, I just broght my rev limit back down. I did drive around for a few years on the manleys and fp2x cams with that high revlimit and ran it up there quite a few times. And I'm still running stock retainers.

I will be shimming them this season just for extra insurance, though I don't plan on going beyond a stock redline. I'm afraid of what happened to Kp116: miss a shift and slightly bend my valves without knowing and be losing power that I don't even know about.

Yea I've thought about buying just eight dual springs instead of all of them (if that's even possible). Cut the cost in half since the exhaust profile is not nearly as aggressive as the intake, and the exhaust valve is quite a bit lighter than the intake valve. . . Yea, that's being really cheap

 

[BogusSVO]

look at what the cam manufacter says about the closed and open pressures.. you want to be in that area...

here is some info I have been gathering about diffrent 4g valve springs.. but no matter what springs you go with make sure they are installed properly..
http://www.dsmtuners.com/forums/newbie-forum/341209-4g63t-valve-spring-info.html

and if you wouls, whatever springs you go with, once you have the spring speck sheet, please post the info!!

Thanks!!

 

[mysticj]

If you're looking for an affordable option but don't plan on going over 8000rpms, I've done fine with the manley singles ...Yea I've thought about buying just eight dual springs instead of all of them (if that's even possible). Cut the cost in half since the exhaust profile is not nearly as aggressive as the intake, and the exhaust valve is quite a bit lighter than the intake valve. . . Yea, that's being really cheap

Target redline 6800-7200. Some companys offer half the set of valve springs...If I go with Manley, might as well go with FP3/FP1x.