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Old 05-07-2012, 04:44 PM
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increasing rpm range

I want to know how i can extend my rpm range. I have a 4.3l stock motor, that shifts at 4grand wot. (Carbureted with turbo400) My mom has a FI 4.3l with whatever tranny comes with that, 4l60 i guess and it will get to almost 6 grand wot. Whats the difference???

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Old 05-08-2012, 04:48 AM
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and it will get to almost 6 grand wot.
Ayuh,.... That's hard to believe,....

A 4.3l is not an rpm friendly motor... Not stock anyways,...

It's got a funky crankshaft...
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Old 05-08-2012, 06:03 AM
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My moms truck is an 02 fuel injected 4.3 with electronic transmission which lets it get to those rpms but i want to know how i can get higher rpms out of a carbed set up with the turbo 400? I'd be happy with an extra 700 or 800 rpms to get me "close" to 5000. Any thoughts?
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Old 05-08-2012, 08:07 AM
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recalibrate the governor in the transmission. http://www.jegs.com/i/B-M/130/20248/...oductId=751474
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Old 05-09-2012, 05:50 AM
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Any ideas how many rpms could be gained through this?
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Old 05-09-2012, 11:07 AM
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Originally Posted by ChadGresham
Any ideas how many rpms could be gained through this?
i think up to 6200 rpm shift point with this kit.
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Old 05-10-2012, 06:03 AM
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Thats great, like i said i'd be happy with around 5000 with this stock motor! thanks
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