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Old 12-09-2004, 12:48 PM   #1
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Default GM 4.3 V6 conversion

Has anyone looked into the possibility of dropping an H.O. 4.3 litre into a Bonnie? Our '95 Astro van has one, and it seems like a very strong motor. I don't know anything about its layout or dimensions so this might be a stupid, stupid question. I also don't know anything about how an FWD tranny would mate up to it or if it could even be done, being that the van is RWD. Just throwing it out there. Thoughts?

Also, does anyone have specs on the High Output GM 4.3?
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Old 12-09-2004, 01:04 PM   #2
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So I did a tad bit of searching and found the current incarnation of the 4300 makes only 190 max h.p. at 4400 rpm. However it torques quite nicely, putting down 250 lb./ft. at only 2800 rpm. Not bad for a stock normally aspirated motor. I'll bet you could mod one to run a mean 1/4 mile in a Bonneville or GP. Thoughts?
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Old 12-09-2004, 01:05 PM   #3
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200hp @ 4600
260tq @ 2800
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Old 12-09-2004, 01:34 PM   #4
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Ehh.. I drove a Jimmy with that engine and it seemed underpowered. I think the go from 0-60mph in around 10 flat. In a Bonney it MIGHT keep up with a stock 92-93 SSEi. If I were you go for the Typhoon turbo 4.3 from the early 90s. Its rare but would be bad a$$ in a Bonney.
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Old 12-09-2004, 01:45 PM   #5
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And the specs for the turbo 4.3 are: 285hp @ 4400rpm, and 350 ftlbs @ 3600rpm. Here is a link for the Typhoon, pretty sweet SUV eh?
http://www.edmunds.com/used/1993/gmc...idenav..6.GMC*
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Old 12-09-2004, 02:05 PM   #6
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Wow, impressive motor. I'm not going to do this project any time soon, I'm just curious whether it would be worth it or whether anyone has even considered it. 250 or 260 lb/ft of torque is nothing to sneeze at, especially at 2800 rpm.
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Old 12-09-2004, 02:16 PM   #7
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A nice turbo 4.3 would be killer. It won't take up much more room than the 3.8.
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Old 12-09-2004, 03:26 PM   #8
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My parents have the 4.3 vin Z (my dad says vin Z for Zero power) in a 94 S10 ext cab and they have a 2000 Blazer 4.3 Vin W

Both Vehicles are SLOW. thoes engines dont rev up like a 3.8, and there is no neck snapping Accelleration.

Couldnt you stroke a 3.8? that would be sweet
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Old 12-09-2004, 03:35 PM   #9
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Quote:
Originally Posted by 1993 SLE
My parents have the 4.3 vin Z (my dad says vin Z for Zero power) in a 94 S10 ext cab and they have a 2000 Blazer 4.3 Vin W

Both Vehicles are SLOW. thoes engines dont rev up like a 3.8, and there is no neck snapping Accelleration.
It'* probably cause that Blazer has the towing gearing.
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Old 12-09-2004, 03:52 PM   #10
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ya it is 4WD 4 door. It is a LT with the Touring Ride suspension but it dodent have the Tow Package
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