POWER
 

HELLO IVE GOT A 1989 GT THAT HAS 70MM BBK GT-40 INTAKE AND CAST HEADS BBK COLD AIR B303 CAM AND WHEN I PUT IN CAM IT DIDNT MAKE A REAL BIG DIFF, I WAS WONDERING SHOULD I GO UP IN INJECTORS (THERE STOCK ) AND MAYBE HIGH VOL. PUMP
OR SHOULD I JUST DO THE E303 , THE CAR ONLY HAS 80,000 MILES SO I DONT WANT TO PULL MOTOR JUST YET BUT PLAN ON BUILDING SOMETHING MEAN THEN THANK YOU FOR YOUR INPUT

RE: POWER
 

you dont really gain a whole lot by putting in a cam unless its matched for the heads, what do you mean by cast heads?

RE: POWER
 

GT-40 HEADS THE PERSON THAT PUT HEADS ON THE CAR BEFORE IT WAS MINE SAID THAT THE B303 WAS THE LINE UP FOR THIS CAM

RE: POWER
 

hello again i ve got 28 psi fuel pressure i droped tank pull know do i go out and get high vol, pump and which pump should i get 155 psi 190 or 210 psi please help thank s

RE: POWER
 

It's not PSI, it's liters per hour. To answer your question, 190lph would be fine for your setup if you wanted to go with 24# injectors.

RE: POWER
 

iam running stock injector but will up grade so the 190 will be fine also iam running the b303 cam what s the diff between the b and the e or x

RE: POWER
 

Do MAF, if it's stock and then injectors. You didn't need to do a cam, unless you are doing heads. 190 lph FP is fine, but you'll need 24 lb. inj. too. 28 is low for FP too.

RE: POWER
 

I think he said he's got the GT40 heads, too, not for certian though. The B will give you lots of grunt down low, but not as much top end. I would look at the TFS stage 1. Seems to have a good profile for a decently modded street car.

If I misunderstood and you're on stock heads, I would recommend upgrading or having some work done on them. You won't notice much difference w/ stock heads. You can tell pretty easily by looking at the casting #'s on the end of the head. E7 is stock 5.0 HO. Also, the GT40's will have 3 parallel bars and the GT40P's will have 4.

Your FP should be closer to 40. The stock fuel pump is 88lph, so the 190 would work fine. I would also get an adjustable fuel pressure regulator (FPR).

RE: POWER
 

+1 on the AFPR. Especially with the FP issues.

RE: POWER
 

A cam is one of the BEST mods you can do to a 302. You fuel injection guys need to realize that when you add a cam you have to let the computer knowto send more gas. On a carbed car this happens automatically for you. Gsp, A B303 will not add down low grunt, it adds all in the high end, thats why its better than a E303, the valves stay open longer so more A/F can get in and more exhaust can get out. I would recommend 1.72 rockers to increase the lift with the B cam, however. I think you need a programmer, chip or reflash...whatever your particular car needs.
-P.

RE: POWER
 

I saw the GT-40 intake, but wasn't sure about heads. Would you recommend a cam without heads?

RE: POWER
 

Never mind. I did just see he had heads from an earlier post.

If you did the heads I'd think a cam is fine, unless I'm missing something.

RE: POWER
 

Even with stock heads a cam is still a good upgrade, probably one of the best. I built a 79 5.0 with all upper end stuff from my 85, some minor machine work on the exhaust port on the head, a .496/.510 lift 280/292 duration cam and a holley 650 vacuum secondary carb. The thing ran sick, was way faster thana stock stang. I woulda guestimated the power at right around 260/270hp and in a 2500lb vehicle, that makes for 1 quick car. I think you need more fuel.
-P.

RE: POWER
 

Impressive. I would have never guessed that was possible.

RE: POWER
 

hello thanks for lots help yes ive got the gt-40 intank and heads and yes i will run top end and just wants to keep going but it seem like it should have made a bigger diff, than it did but 28 psi i know is low ive already dropped tank and got old one out now i am gonna get 190 tomorrow and ill get 24lb inject, ordered but just by putting in pump i should be able to tell a diff, correct also so in the 1989 computer do i need chip or diff ,computer like out of a cobra , i dont think it can be reflashed what would i use in this case ,

thanks guys for the help

RE: POWER
 

A B303 isnt going to make a gigantic difference, give it a break. Its more of a duration cam, valves stay open longer. And with 28psi, its not helping things any.

If you want more power, go with a little bit bigger cam.

I would go with a Trick Flow cam, ive heard lots of good things about them. I run a FRPP F303 cam and its got boat loads of power up at the top end, but it is what it is, an older grind cam. Technology has gotten better. Go with a Trick flow or a custom cam next time. Comp has some nice grinds for the 5.0 to.

Shop around a little bit.