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Hey guys i am a new owner here. I just bought my 1990 zuzu trooper today. It is 4 door with a v6 and a 5 speed. I am curious if the holley tbi upgrade for the 4.3 will work on the 2.8. I have seen that the 4.3 will bolt right on and have no problems but i also heard to expect like 20 horse's which i think is a little high. Any input? The tbi is really small though but i just wanted to ask you vet's.
 

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Most upgrades, with the exception of headers, should work on your 2.8L. Just double check the part #s and listing to make sure it will work on the 2.8L and if it lists the motor 90% of the time you are good to go.

I am no expert on the 2.8 by any means, just going by word of mouth. I have not heard much on the TBI upgrade perfromance wise, but I heard it does open up the motor a little more. Someone with more 2.8 experience will hopefully chime in on their experiences.

20 horses does indeed sound high..........

Craig
 

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If your going to do the 4.3 TBI upgrade (which can be any GM TBI unit from an S10/S15), then you'll also want to obtain a new 2.8 intake, take it to a machine shop and have it bored to match the bore of the TBI unit (You can do this yourself, I've heard a dremel will do it among other tools, you just need to make a template). Just bolting a 4.3 TBI to a nonmatched intake is like, well, rice :roll:

Boring out the intake will provide all the bennies of the larger TBI.

Articles here:
http://www.4x4wire.com/tech/60degreeV6/?

and at the forums, do a search on '4.3' - there have been a couple of large posts recently on this TBI swap topic:

http://www.4x4wire.com/isuzu

HTH

Cheers,
 
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