so i really like forced performance and am looking into getting there fp5s. is anyone running these? there website states they need springs and retainers so what are you guys running with them? thanks

 

these cams are a very big set of cams, so be wise when you choose your cams. These particular cams arent reccomended on any turbo smaller then a 35r.

And idk if you've done your research on FP's cams but they are close to impossible to get to idle right, so if your car is a daily driver you might want to look somewhere else.

Dont get me wrong FP makes awsome cams and they make great power but they are just verh hard to get to idle normal, they need alot of RPM's to idle correct.

FP4R's are rated like a 274/272 i beleive
FP5R's are like a 282/280 i belive not 100% sure but both sets are nasty.

just search some beore purchase because i no alot of ppl had problems with idle and drivabilty.


Dom

 

ya man thanks.... i searched a decent amount but everyone has mentioned the fp4rs. theres not to much info on the fp5rs but thanks again

 

M3's are good cams if your on a Big Turbo. Kelfords were tested to make great power but I've been reading the intake cam on the evo ix's like to snap so

 

I have installed, driven, and tuned fp5rs. Of course this was in a full engine build, with Buschur Je Pistons. With these pistons there was plenty of valve to piston clearance in depth, but we used +1mm valves so there was not enough side clearance, and I had to cut the reliefs larger. You should never assume, but it looks like with Buschur JEs, and stock diameter valves you can use these cams for sure. There are reports of people using them in stock motors, but you need to check regardless.

They are awesome. Spool is near stock with the red. And I have it idling like stock at right around 1k. I have no experience with them in an 8, and cannot comment how they may idle in that situation. Over all I am certain that the car is idling and driving better than it did with the stock cams.

Cant wait to get a turbo on that car, that will necessitate spinning higher than 8-9k.

 

This post has a lot of inaccuracies and statements that are just plain wrong. Please do your homework before making blanket statements like these. FP cams work very well, and have no inherent tuning problems. That's a function of the tuner. FP5s are obviously more radical cams, and need someone who knows how to tune them to get the benefit they provide. As I recall, 9sec9 /OKIX runs the FP5s, and they work very well without idle problems.

The FP4s are less extreme than the FP5s, and came out well in the AMS cam test and a number of well known street cars.

Tuning idle is a function of knowing your computer and how to get the most out of it. Any non-stock cam will cause idle problems if not properly tuned...

 

I wanted to add, all though we have aem ems for the car with the fp5r installed I got it to idle and drive like stock on the stock ecu.

 

that is what i am wondering too i am looking for some more top end power i have a 6765 and all the supporting mods to be had and cosworth m2's my bottem end consists of ross pistons and oliver rods, and my head is built but not ported with ferrera dual springs and retainers lockers the whole 9 and supertech valves intake and exhaust will i have to grind the guides down for clearance or you guys think i will be fine if i switch to this 5r cams because i want somthing more aggressive and really there is nothing available for the IX. thanks

 

bump from the dead for anyone that has any experience with these cams.

 

I have them on my car but as of yet I have not pushed them to their limit- they idle nicely around 1200~ that is on the stock computer. I have a new setup coming together soon and I will update to give more input as far as pushing these cams. I have mine with supertech stock size valves and springs with buschur JE pistons and no problems with clearance. They are definitely a top end cam and they come alive north of 4k let me know if you have any other questions

 

I run the 5r Cams with a 6765. Magnus cast intake, ported head etc. The car pulls hard to 9800+ no sign of dropping power off up top. The car has been over 150 on ~40 psi in at 3200 pounds so its making power.

You must check everything, I checked my ptv in multiple places and multiple degs of mivec control. I also do not think the super tech springs will handle these cams, I run kigglys stuff.

Fathouse

 

I wonder how well these can would work with a 2.4?. Fathouse, what it the compression on your motor? Had your head been resurfaced before?

 

I would say they would work really well in a 2.4

I run 9:1 weisco HD pistons, and yes the head has been decked a few times now. .5 mm+ valves.

Fathouse

 

Who did all your head work? I know there are some requirements in relation to the valve stem height and other things to be able to run the cams in a head that has been resurfaced before.

 

Marco at Magnus motorsports.