I'd search for a good used engine from a salvage yard and forget the turbocharger. Turbocharged engines from the factory are slightly lower in compression. The loss of power is made up by the turbo since it packs in more air. There's lots of other variables too. If you can find a relatively complete car, you'll be able to put the correct exhaust manifold and computer back on. The way to make it run the best is to put it back to factory setup.

Answered by caradiodoc (expert)
17,324 answers provided

Alternatively if you wish to continue using the turbo, then it is best to get the pistons etc replaced with one suitable fpor turbo engines and that could be rather expensive.

Using a stock engine with turbo boost is ok if you lower the boost pressure and do not trash the engine too hard. They re not drsigned for that purpose when you do retrofitting.

Answered by KHLow2008 (expert)
39,956 answers provided