Turboing a 4.3 in a silverado

S

SilveradoTurbo

New member
posted this awhile ago and after weighing all of my options I decided to go ahead and turbo my 4.3 in my silverado. I planned on just buying a syclone because that would be the smartest thing to do but I have come a long way on my half ton and now that I got some torq thrust II's on it I dont want to let it go. The motor is strong for a 4.3 with 68XXX on it. Now to the turbo....what can I do? Im not so concerned with the actual workings of the system but just the electronics. I got buddys with turbo VW's and what not that have gone through and built their whole systems that I can Figure that out, but I need a whole shopping list for electronics and what not. so far this is my plan, includes everything needed except what i dont know I need or am not sure about

t3/t4 or t4
upper and lower manifold
Frount Mount Intercooler
Tial 38mm wastegate
Greddy BOV
Custom built headers and downpipe
Oil lines and what not
probably 50LB. injectors

now what do I need for electronics to control this throttle body because it is different than the stock, non turbo manifold. also I could use some pics of some clear engine bay shots of headers and everything. How do the headers come together? do the left and right headers just join underneath the truck and then the extension comes off for the turbo and then it just has a downpipe from the turbo? how big of a downpipe would be good to still have backpressure? 3 in. because that is what my catback system is.
Basically im just looking for what peices I need to finish my puzzle, I mean everything, wiring, throttle cables, the works.
 
VermontTy

VermontTy

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Re: Turboing a 4.3 in a silverado

This will A) get you started, or B) persuade you to drop in a decent 350 instead....

Upper intake manifold
Lower intake manifold
Throttle body
Gaskets for the above
Fuel rail
Fuel injectors
Adjusble fuel pressure regulator
Fuel rail fittings w/ braided line to your filter, tank, etc.
Exhaust manifolds
Exhaust crossover pipe
Turbo
Turbo boost solenoid
SyTy air intake system, or at minimium, the orange elbow
Downpipe w/ 02 sensor
Catalytic converter
Interior wiring harness
Engine wiring harness
Fuel injector harness
ECU
Chip
Various gauges to read what is going on
Complete SyTy and Silverado wiring diagrams to figure everything out
Oil pan, or mod yours for turbo oil return
Turbo oil feed / return lines w/fitting on the block
Turbo coolant feed / return lines
Vacuum lines
2bar MAP sensor
SyTy-specific power steering pump
Upper Intercooler
Intercooler brackets
Lower IC heat exchanger
Intercooler pump with relay

I'm sure I'm forgetting stuff; this is just what I could come up with off the top of my head. With your stock N/A 4.3, you'll also be lucky to run 6-7lbs boost before you knock like a bastard and blow the thing apart. I'm not sure what kind of power you're looking for out of your 4.3, but under 15psi, we get 300hp/400ftlb. At half the boost, I'd guess you'll pull 225hp/300ftlb? Not trying to push you from turboing your silverado, because its an admirable task, but if you look at bang for the buck, you'll end up with FAR more power for about 1/100000th the headaches by just dropping in a ZZ4 or decent 350. Good luck. If you want to look over diagrams, wiring, pictures, etc., check my NASTE folder below....

http://www.northeastsyty.com/gallery/view_album.php?set_albumName=album442
 
Robert Lone

Robert Lone

MUTANT
Re: Turboing a 4.3 in a silverado

For what it's gonna cost to turbo your 4.3 "correctly" you could have a 500 cu in Big Block Chevrolet w/ aluminum heads, electronic fuel injection, and a nice 8-71 blower hanging out of your hood.

Now ask yourself which one you'd rather have and be honest....
 
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