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Check fuel pressure before anything, and like 1SLO said make sure the fuel pump is even priming...

But I've also seen silly power numbers on stock bottom-ended cars that had no business making those kind of dyno numbers. I suppose by "factory freaks"...I should rephrase.....into well-tuned cars on exaggerating dynos....I wouldnt be surprised if the dyno operator had it set on net instead...

I think a lot of the 300+ rwhp on stock or near/stock equipment is one of those 'factory freak' deals....some cars will make the power, some won't. There seem to be far more guys making 280 or so, than guys making over 300.

Bottom-line, if youre crossing right at the end of a gear, don't increase the rear-gear because you're just going to force a shift that will cost you time and speed. If you're trapping right at the end of your powerband already, you'd be better off either a) finding ways for a better launch...

cylinder labeling for a 5.0 HO / 351W 4 8 3 7 2 6 1 5 [front of vehicle] Firing order: Counter-clockwise, 1-3-7-2-6-5-4-8

cylinder labeling for a 5.0 HO / 351W 4 8 3 7 2 6 1 5 [front of vehicle] Firing order: Counter-clockwise, 1-3-7-2-6-5-4-8

If you haven't messed with your idle stop-screw, don't go messing with it now, you're just going to whack it out along with your TPS voltage which will cause more problems. As Beasly said, sounds like a vacuum leak to me. If it's that bad, you can usually hear it hissing....have a buddy get...

REPOST

Well no filter can trap 100% of the foreign particles passing through it, thats why they stamp micron ratings on some of the higher-end filters.... I used to run Mobil 1 10w30 and an FL1a all the time, the Motorcraft filter is excellent. The ONLY reason I run a K&N filter now, is because I...

The 9th hole IS on the Cobra manifolds, and I believe its EGR. I have a photo of my old Cobra lower manifold and it looks identical to your picture.

Gear it so youve run out a gear right as youre about to trap, dont gear it so you have to grab the next gear and cross the trap a second later, you're gonna cross it out of your peak power and youre gonna lose time shifting too.

Call around, the guy youre asking might be dumb.... I would *think* any of the explorer GT40-style intake gaskets would fit since theyre basically the same lower plenum design I believe, staggered circular ports....but dont take my word. Dont you have an old one you can just bring in and...

I've already vowed never to buy an automatic again except under the condition that that model of car only comes with one.

See it's proof, all you 5.0 people are mentally retarded! :D

Just too many factors to call. I've seen lots of cars push under what they should, and lots push over. I think it's best to give conservative estimates, keep them from being too upset. Am I happy with my 268 rwhp number? Not really. But it does 110 at the track and runs awesome, so can I...

Oops, sorry... Used to being on small forums where if you think of it, it probably HASNT been discussed. Lol thanks.

I've heard contrasting opinions on this one. The general consensus, of the people I hear from, seem to say that due to the stroke and bore ratio of a 347, it's not as reliable for extended mileage, as in street applications. And that a 331 stroker is more reliable over long-term. But I also...

Here's a clip from my car. It's dumped Spintech Pro Streets, a 2.5" offroad X pipe, and 1 5/8 equal length shorties. http://videos.streetfire.net/video/f54a04c1-38e6-4ef8-a4a2-986f0117f09b.htm

+1 for RWHP, though I think 300 would be the upper limit if your bottomend is in *excellent* shape and your tune is dead-on, you're well matched but I wouldn't expect much more than 280's on a 5-spd car, 270's on an AOD car.

Thanks man, that was actually on 255/50/16 BFG DR's at 15 psi. I have a stock tq converter, so I leave the hole at 1200 rpms wide-open and bog like you wouldn't believe. :rolleyes: Im going back to the track, on street tires in a few days....its colder and the car is running better now, but I...