I have completely stock valve train right now. Thinking of going with the FP5Rs over the Kelford 280s because of the 12mm lift! I know they'll clear on stock pistons and stock valves but will they with a piston that's 10:1!? I'm thinking it'll still work because I doubt that going from 9:1 to 10:1 will make a big enough difference for the valves to make contact with the pistons but I haven't seem them installed on anything with higher compression pistons so far so if anyone has any insight into this please enlighten me!

 

...nobody yet?

 

First of all, the 12mm lift won't help you, but it will make it hard on the valvetrain. Why? Because the ports of a factory EVO head can't flow any additional air above ~10.5mm lift, not to mention it wouldn't be wise to fit this to a factory valvetrain regardless. Secondly, cam with that type of lift necessitates checking for valve clearance with high compression pistons.

Perhaps more importantly is more than likely, this cam set is not the best option for you.

 

Well basically what Im going for is the "ultimate" roll race evo lol. I prefer street racing more than anything else and my overall goals for the car is for it to pull as hard as it can uptop. If I need to completely build my head to do that then that's what Ill do.

My current setup:
3582R single scroll t3
AWD Motorsports T3 manifold single scroll (longer tubular style)
AEM EMS (speed density)
BC272s Stock everything else
2.0L; wiseco 1400HD pistons 10:1cr, manley turbo tuff long rods 156mm, stock crank, .020 bore.
RNR 3" FMIC (i know, it needs to go, ill be selling it for a 4" AMS core very soon)
Stock intake manifold
Will be tuned on e85

Everything I do from here on out to my car Im going to do with the intention of making it more efficient on the top end. If you have suggestions, Im all ears. Im not going to sit here and pretend to know a third of what some of the people on here know so when people on here talk, I listen, research and try to learn as much as possible. There's a lot of "fanboys" on here from anything from FP products to stock ecu tuning to what springs to run. But if you follow the crowd on everything youll never be faster than the crowd.

 

REALLY? thats all... wow


Why are most cam manufactures all gun hoe about the 11mm lift(kelfords, gsc, etc)? wasted lift? or in case your ported?

 

Well i think what he's saying is that I wont be able to fully use a cam like that until I port my head and on the stock head Ill only flow 10.5mm of that 12mm of lift, which lift itself isnt a measurement so Im sure that calculates into some form of "cfm." I have been debating porting my head during my build. Ask any engine builder, the airflow through the head is where youll make all your power. However, I could be wrong. Lol. The only reason I didnt port my head is because I was told by many on here that the gains would be minimal in relation to the dollar amount that I would have to spend, while on a GT3582R. I just woke up a few minutes ago too so if there are gramatical errors here and there, I'm sorry. Lol.

 

The Guru said Factory head. This means factory sized ports and valves, if you're getting head work done this opens up allot more possibilities.

 

What makes you so sure they will fit on stock pistons? I run the fp5r cams, and my setup is TIGHT on weisco1400hd 9:1 pistons with the mivec gear full advanced. Tightest spot is 10deg atdc.

I love the cams, but I would not take anybodys word on it, until you (or the engine builder) checked all the clearances a few times. These are some big cams.

I run Kiggly springs and retainers, the stock retainers will hit the guide.

Fathouse

 

Well of course you always check clearances but I've never heard of an issue with using them on the stock 9:1 pistons unless you have oversized valves. I'm sure with a 10:1 piston the fitment would be tight but I'm not sure if anyone has ever done it. If I can fit these cams in my car I will and I will get the head ported as well. If not, then I won't worry about it and I'll go back to the Kelford 280s that I was going to get, but I figured I'd just get the best top-end cam I could find lol. I suppose I could always sell my Kelfords later and upgrade after I port my head but that just seems like a giant waste of time to just go ahead and get what I want now.

 

9sec9 was running FP5Rs on his car and im sure he had to have some high compression pistons, maybe you wanna talk to him and see what he did.

 

Thanks. Ill send him a pm and see what he says!