moparmatt89

I was wondering what fuel pump i should get, currently i am running a stock fule pump and i think that it is killing my high end power.
Here are my specs, let me know what you guys think a good pump would be.
Ford 302, 9.2:1 compression. comp cams extreme energy camshaft( Intake: 268 duration 509 lift, Exhaust: 280 duration 512 lift), weiand xelerator intake, currently a 670cfm holley street avenger carb but im getting a 650 double pumper froma friend, roller rockers, headers, 3.55 gears in the back.
Should i just get a racing pump and use a pressure regualtor? i plan on building a 408 stroker evetually and wanna be able to use this pump and not have to spend money on another one later down the road.
Time slip:
R/T .238
60' 2.305
330 6.228
1/8 9.430
mph 76.84
1000ft 12.202
1/4 14.592
mph 93.84

I was running on street tires and just spun off the line. The car would also just nose over at about the 1000ft mark.
Any ideas or suggestions?
Thanks
Matt

68CSTANG

Are you using a mechanical pump now? I would go with a Holley blue or red electric pump. Have you checked your fuel pressure?

mjr46

read the post rules...you aalready posted in the classic section this same thread...anyeay your problem is not fuel related IMO.....it is a mismatched combo and what heads are you using???

moparmatt89

sorry about the double post. im running a mechanical pump with about 5-6psi. the heads are ported cast iron heads with oversized valves. 1.94 intake and 1.60 exhaust

mjr46

well head choice should be okay for flow but you really need a dual plane intake and an rpm or rpm air gap or comparable would be my suggestion......my 66 has c90e heads with 1.94/1.50 valves a crane fireball cam .500/.500 an rpm air gap and a t-5 tranny, 3.50 gears, full length hooker super comp headers and roller rockers and duraspark ignition and a 650 double pumper and on street tires it has run a 13.6 @ 103 mph

mjr46

oh and I'm running a stock mechanical fuel pump with no probs

moparmatt89

ok thanks for the advice. i actually just put that intake on about two weeks ago cause i was running a regular performer. i also think i have some problems with my carb. i am running a 670 double pumper(i jetted it down two sizes) and going down the track i felt the secondaries open for a brief second then close back up. Also its shuttering off the line a bit, and today i drove it around and everytime it hits 1500rpm is hesitates. pulled the plugs and they seemed alittle lean too.

mjr46

I'd really put a smaller carb on and if it hesitates off cruise like when you initially give it gas.. the issue is in the accelerator pump circuit..= either to much delievery, or not enough or to little discharge rate= corrected by different accel pump cams and or squirter size

moparmatt89

one of my buddys took the car for a spin at the track last night and he also said it sounded like the accelerator pump was bad or needed to be changed with a different one.

67mustang302

It's not fuel. I'm running a stock fuel pump on mine as well. It's just a mistuned and mismatched combo. That intake and carb setup are killing you. The regular Performer with like a 500-550cfm carb is all you need on that setup.