another hp estimate thread!!

[nick_94cobra]

good evening gentelmen!!

i've got a 331, edel pef. rpm heads and intake, f cam, currently making around 375 fwhp. i've got a goal of 425 fwhp. i'm waiting on a email back from ed, but do you guys think i could get there with a custom cam from ed, and porting, polishing the **** out of my heads, and the same with the intake? Or would i be better off investing in better heads? i'd like to keep my heads and intake now, so if it's possible,, that would be great!!

 

[nick_94cobra]

nobody?? not even a guess?

 

[ShortThrow50]

how are you figuring these fwhp numbers dude? Are they wild guesses or something.

 

[85_SS_302_Coupe]

Yeah, how did you come up with the flywheel numbers? Have you had the car chassis dynoed? If you wanna play the 15% drivetrain loss game, i'm making right around 416flhp, but that's all guestimates and shots in the dark.

 

[nick_94cobra]

i had the car dyno tuned about 3 years ago with all the current parts on it, and i made 330 rwhp, so i was figuring about 375 fwhp. i'm just wondering if i can get this combo to make 375 or so to the wheels with the current heads and intake

 

[85_SS_302_Coupe]

So you're talking about an actual gain of 45rwhp...with a custom cam and porting your heads and intake. I think it really depends on how the F303 was holding you back as opposed to how well Ed's cam will suit your combo. I also think the whole thing depends on how well the heads and intake are ported, and you should get them done BEFORE you contact Ed about a cam and get the heads flow bench tested so you have some cfm numbers to give him since that will help him tailor the cam to your combo.

 

[nick_94cobra]

cool, that's what i was looking for. i'm just wondering, how much having my heads and intake ported is going to cost. is it going to get to a figure where it is still worth it, or should i get a set of afr's and call it a day? just looking for info here, don't have a ton of money to spend, but i'd like to have enough power to run low 12's n/a.

 

[85_SS_302_Coupe]

I've honestly heard of port work in the 3k range...but we're talking serious race heads. Beyond that i honesty don't know...i bought my heads already ported. I know it's one of those things were good ain't cheap and cheap aint good, know what i mean?

 

[57fairlane]

i'd like to have enough power to run low 12's n/a.

If you are making 330rwhp (and by default maybe ~340rwtq) you should be in the 11s.

Sounds like either you can stop now or shoot for low 11s.

I wouldn't bother to port the RPM heads. A good port job is usually $700-$1,000 and you figure you would be out that money AND what you could sell the RPMs for. So for ~$1,800 imagine what type of heads you could buy.

 

[nunly94gt]

Yeah I cut a 12.5 with X303 cam, 1.72 rr, 650 carb, vic jr intake and performer rpm heads.

I spun out real bad on drag radials and still made 12.5@110. So yeah if you cant hit 12's with what you have now, work on your suspension and driving technique to find whats suited to your taste.

 

[nick_94cobra]

alright guys thanks for the info. it looks like i have the power to run low 12's or high 11's, just need to improve the suspension and drive it a little better. thanks for the advice

 

[Cobra912]

I ran a 12.2 at 113 with my 331 after some poor launching . I'm running a Performer II intake, performer heads and a comp cams NX264HR. With better driving, shifting, my msd 2 step I know I could have been high 11's. NOw I have a Paxton so I'm hopin for mid 11's

so yes you should be able to achieve that