Single Most HP Improver

[GearHd6]

What has everone experienced to be the single most gain in HP other than a supercharger or NOS. Heads, intake, cam?

 

[331 stang91]

heads/cam combo but you will need an intake manifold to so the heads can breath

 

[GearHd6]

What do you find to be the best combo for a stock displacement 5.0? I want to stay emissions legal and trouble free.

 

[281pony]

single improvement? obviously heads.

there was an article with a bone stock 5.0 and they installed afr heads with some headers. it picked up something like 90 + hp if i remember correctly.

 

[1EVIL88VERT]

 

[Wil]

if you can't afford either, I know it's not "horsepower" but a set of gears would make a very big smile on you face

 

[GearHd6]

Which CC heads are recommended?

 

[Michael Yount]

If you're trying to stay emissions legal, go with a 64 cc or so chamber to keep CR down; but you could probably pass with the 58's. Bolt on a set of AFR165's with an aftermarket intake - I'd go Cobra/Explorer/GT40 - and a set of long tubes with high flow cats/exhaust system, and a set of 3.73 gears. Add a pair of subframe connectors, and a decent maf/throttle body and you've got a car that's capable of stock drivability, emissions and fuel mileage (maybe a tad less on the highway) but will run MUCH better than stock.

 

[GearHd6]

To me the GT-40 and Cobra intake look entirely different. The GT-40 looks like individual tubes where the Cobra looks more like a stock 5.0 intake. Which one is the best?

 

[mondos90lx]

twin turbo system

 

[afast93stang]

This doesnt work for everyone but best gain in HP I ever got was when I took out the 2.3L and droped in the 5.0

 

[Michael Yount]

GearHd6 - look more closely - the GT40, Cobra and Explorer all share the same lower intake, and the lower is the bottleneck to flow. All three flow/perform almost identically.

 

[criticman]

GearHd6 - look more closely - the GT40, Cobra and Explorer all share the same lower intake, and the lower is the bottleneck to flow. All three flow/perform almost identically.

Yeah, I forget where, but some site had flowbench comparisons and there was too little difference to matter - if buying one, buy the cheapest you can find.

 

[90mustangGT]

It's hard to say what single mod would make the most power, because components need to work togeather and some "mods" requre more than one part. I was going to say Turbocharger, but then you need to get other mods to support it such as fuel upgrades, exaust modifications. I guess you could turn the stock headers backwards, add a turbo on each side, rig the exaust to mate back up with the stock H-pipe and I guess run only 5psi of boost with no intercooler and hope it doesn't detonate. Probally the add on that requres little or no other modifications would be a shot of nitrous, 80 shot or less, but not too big because the fuel system wouldn't support it.

 

[Kerpal]

If you're trying to stay emissions legal, go with a 64 cc or so chamber to keep CR down; but you could probably pass with the 58's. Bolt on a set of AFR165's with an aftermarket intake - I'd go Cobra/Explorer/GT40 - and a set of long tubes with high flow cats/exhaust system, and a set of 3.73 gears. Add a pair of subframe connectors, and a decent maf/throttle body and you've got a car that's capable of stock drivability, emissions and fuel mileage (maybe a tad less on the highway) but will run MUCH better than stock.

I thought AFR's make enough power/flow enough air to require fuel system upgrades as well? Or is it possible to keep the stock pump and injectors?

 

[Michael Yount]

Just assumed everyone knew the pump would have to be changed.....sorry. I'd stick with the 19's to start with. $50 for 3 dyno pulls with the wide band will tell you if you're outrunning them or not.