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MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
New engine
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[QUOTE="Flyin Hawaiian, post: 153069, member: 18984"] I think the Goodwrench motor is the way to go as long as a stock replacement is used. The stock fuel injection will not support any of the high performance crate motors that are sold under the GMPP name. The 330 horse vortec, ZZ4, 383 vortec will all require more fuel and air to run properly. Custom programming and different fuel delivery systems will be needed. I have a 91 GMC C1500 reg. cab shortbed with a older ZZ3 345 horse crate motor. In order to keep the cost of the conversion down, I used a 700cfm Holley Projection throttle body with a custom chip. This set up let me use my existing wiring harness and was a plug in. I had to switch to a 5.7 truck computer. My truck was originally equipped with a 4.3. It was set up by Howell Engine Developement (the injection that is) in Michigan. A nice combination for a stock rebuild would be a new 5.7 shortblock, Vortec heads and GMs new tbi Vortec head manifold. Possibly about 20 ft lbs more torque and 20 or so more hp's. Emissions legal too! [/QUOTE]
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MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
New engine
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