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So recently I’ve been thinking of upgrading my engine but I realized that would cost a lot of money on top of having to get my exhaust and my transmission changed out... has anybody thrown a turbo on their 4.3L Fuel Injected engine?
 

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So recently I’ve been thinking of upgrading my engine but I realized that would cost a lot of money on top of having to get my exhaust and my transmission changed out... has anybody thrown a turbo on their 4.3L Fuel Injected engine?
If you go completely through it and up-grade everything will be a fun project. However, if you just throw a turbo on an otherwise stock 4.3 get ready to buy some oil pans to catch all the blow-by..... and make plans to buy a new 4.3 block soon...... Boost is fun but research carefully before you go there!

Joe
 

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So recently I’ve been thinking of upgrading my engine but I realized that would cost a lot of money on top of having to get my exhaust and my transmission changed out... has anybody thrown a turbo on their 4.3L Fuel Injected engine?
Depending on the turbo size and boost your thinking of doing, it might be to much for your stock 4.3 And or tranny , unless your gonna run under 5psi of boost, but then I’m not sure if it would be worth it, could be fun for a little while?
 

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If you have to ask, you’re probably not equipped with the knowledge and skills to fabricate that install. I don’t mean that as an insult; I don’t have the knowledge either. I do know GMC changed a lot (compression ratio, computer, injectors, fuel pump, etc) to build Syclones. If you were in a shop that did this type of thing, or were surrounded by Buick GN people, I’d say ‘maybe’. That said, I DO know that turbocharging a 4.3 successfully will be a lot more work than the exhaust and trans work you want to avoid. The simplest turbo swap by far would be to put a complete GN drivetrain in. The simplest way to get more power would be a V8 swap-drop in a 350 or 383, keep the trans, delete the computer and run a regular HEI distributor, mechanical fuel pump and non computer q-jet. (Or, if it’s a mild engine, set the 4.3 throttlebody on it). Still simpler than turboing the 4.3 is the LS swap. I don’t want to be Debby Downer; a turbo 4.3 would be very cool, but not easy.
Patrick
 

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