Build me a 5.0

Oct 13, 2004 9 Replies

I am going to build a 5.0 for a 68 coupe, and am going crazy trying to get a plan together.



Basically, I'm looking for at least 275 HP using a 92 fuel injected core. I have all the FI wiring, sensors, etc., and wiring it is no problem. But I am also using an AOD, and would like to select heads, intakes, throttle body and cam for best power at lower rpms, with peak power in at 5500 rpm or less. I don't want to defeat any smog control (except for not using cats).



Any and all suggestions appreciated.



Edwin


take one factory 87-92 5.0 H.O. add a cobra induction, longtube headers,roller rocker arms,give it a good tune & you'll be close to

275 hp at the flywheel. mild port work & cutting the E7 heads .030 will help. the factory H.O.cam is good for around 300 hp & 5500 rpm

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Sorry it puts out more hp than you wanted, but it's a done deal.

Or you could get this:

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Then pick your heads, cam, intake, etc...

Steve

72 Skylark Custom455

snipped-for-privacy@aol.com (STR00NTZ) wrote in news: snipped-for-privacy@mb-m22.aol.com:

The '92 is good - it's got the right pistons for the Kenne Bell you can just bolt on for 75 easy hp.

Joe Calypso Green '93 5.0 LX AOD hatch with a few goodies Black '03 Dakota 5.9 R/T CC

Which, by the way, is excellent for bottom end torque. The twin-screws are supposed to feel like a big block got thrown into your car.

For bottom-end power, the theory is H-pipe instead of X-pipe exhaust, longer runner manifolds instead of shorter, and a cam set up to put the power where you want. Oversized intakes will give you top-end horsepower, but will kill the bottom end grunt. Choose your parts wisely and ask lots of questions.

Or, you can do as Joe suggested... you could leave the '92 engine bone stock and throw on a Kenne Bell blower and you'll be at your goal. Just make sure to have it dyno-tuned to get the fuel system tuned correctly.

JS

I agree with what you said. Thats why I suggested a cobra intake and a custom cam. Along with some halfway decent flowing heads and that should make 275 horsies easily. Erik D. '94 white lightning

It's not the length of the tubes that determine low or high RPM power improvement, it's the diameter. Smaller primary pipes tend to help in the bottom end. Shortys don't flow as good as long tube but in your case I'd go with shortys for better ground clearance and less engine compartment heat.

Sorry if I wasn't quite clear Mark, I was referring to the intake manifold runners as far as length goes. The airbox style is great for high RPM HP, but loses some of the torque. The inverse is true with the longer runner style intakes (stock, Cobra, and the GT-40 to an extent).

JS

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