Cam Profiles...What's Most Effective

[Xtraction]

What (in your opinion) would be the most effective cam profile if I were trying to reach 500awhp on an FP3065 pushing 25+ lbs boost? I have the bottome end to support this (check my vehicle profile) and now I'm thinking about the head...just wondering. Keep in mind that I live a mile above sea level. If you're making 500awhp at sea level then you're only making what...425 in Denver? I don't know all of the details that you guy's need to answer this so let me know and I'll post what I've got. I know a lot of people use HKS 264's and 272's...some use a combination of both. I've heard that you won't get any different performance out of the 272's than you would from the 264's...is it true? I'd like some advice from those of you who have real world experience with different cam set-up's. Thanks in advance.

 

[project_tsi]

The 264/272 will easily be too small for you. If you want 500 whp, you need to look into running FP3's or FP4's, Also known as Comp 101300's or Comp 101400's. And you need to valvetrain mods to support it. I.E. New springs and retainers, and OS valves.

 

[dsm-onster]

I've heard that you won't get any different performance out of the 272's than you would from the 264's...is it true?

Where did you hear that? If you tune her right and match the turbo to the cam you get more from the 272s 99.9999999% of the time, IMHO. More rotations per minute equals potentially more airflow per minute. With the 272s, you can maintain the volumetric efficiency at the higher revs that you would normally get at the lower revs. same VE higher rpm equals more flow, which equals more torque . My opinion is, a small 16g setup won't gain very much going to 272s from 264s... But, a 50 trim or 60-1 or a holset will. Match the turbo to the horsepower you want and match the cam to the turbo you choose.

Back to your question, I think a set of FP2Xs might be enough. I don't know dyno numbers, but these cams are tested and tweaked by Forced Performance for 2.0L engines. They have higher lift and ramp rates than the FP2s; and the FP2s are said to have more topend than 272s and the same midrange of 272s. I agree that you should completely upgrade your valvetrain. You'll surely need a higher rev limit than your tranny can handle. So you'll need to remedy that, too ($3000 shep tranny). After you're done tuning, take a road trip to the valley . Shew, 500whp is expensive

EDIT: took out the part where i mention holsets. You already have your turbo.

 

[Xtraction]

I plan on getting the head ported & polished. I'll use Ferrea stainless steel valves, titanium retainers, and some stronger springs. I'm cool with all of the other parts of the valvetrain...just not the cams. Thanks for the info though. I didn't even know about the FP cams. I'll have to do some more research on it. evil_eagle is using the FP3575 with HKS 272's and he's pushing like 650hp on something psychotic like 32 psi with a best time of 10.669 @ 138.990. I don't think he's changed his cams but I could be wrong. Sorry Jake if I'm wrong.

 

[Xtraction]

Maybe the statement about the 272's and 264's not being that different was in regards to a smaller turbo...I don't know. I'll definitely look at the FP2X cams. Thanks! This is great information...keep it coming!