Say if someone would go to a salvage yard and pick up a used turbo, what candidates would I look for?
Basically, I'm thinking of a diy turbo on a SBC in a third gen camaro on the vortec 350 I'm wanting to build. Would a cummins diesel be too much boost? I'm only wanting just a little, and I think these guys have a T3 flange. What else would make a suitable donor, something that's common enough to be cheap, but not make train levels of boost.
Maybe one day I'll actually start a Project...
I think a Cummins or any big turbo diesel would be the only ones big enough to bother with.
Otherwise, the other two biggest turbos to come on a production gas engine are the Grand National/GNX turbo, and the MKiii Supra turbo, respectively. I know for a fact the Supra unit won't be quite big enough, not sure on the Buick.
Yeah, definitely a diesel-sized unit (Holset, etc).
http://www.turbofast.com.au/TFmatch.html
very generic but would give you an idea...
for junkyard turbos your best bet would prob be twins... prob something from volvos would work well...
Are you designing the engine for low or high RPM usage? Do you want the boost down low or up high? What kind of fuel management are you going to run?
Just make sure you do some flow calcs on your engine and select a turbo with the right size compressor for what you're trying to do.
For example Holsets come in many flavors of compressors and turbines and turbine housing sizes. A HY35 series aka HE351 can be used on 2.0-2.5L SOHC and DOHC motors quite nicely but require porting of the stock wastegate or else you'll overflow the stock turbine, otherwise you need a much larger external gate. In other words this turbo might be big enough if you only wanted a small amount of boost, but might be too small if you wanted anything more...
HX40 and 50 series are big, and can handle big flow for big motors. These may be better candidates for a single turbo on a v8...
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