Short Block Question

[spittinfire]

I'm new to the 2.3 turbo world so I've got a fairly basic question that I haven't been able to clear up through searches.  

What is the max over bore on a 2.3 turbo block?  If sonic checked, what is the minimum wall thickness you're looking for?  

I pulled the engine out of an 87 Turbo Coupe parts car I have.  The engine was rebuilt at some point 20+ years ago with a 280H cam and springs, 0.040 over TRW forged pistons, crank was ground 0.010 under, new bearings.  It was not run much at all, the pistons look like new so I was really hoping to just re-ring it and build a 400ish HP engine but now I'm reading more and more about cylinder wall thickness.  Do I just need to scrap this idea and get a new block?  Sonic test it?    

[Stinger]

0.030" is the typical max overbore for a high power turbo build with stock block unless you're using hardblok for a 3/4 fill in the coolant passages.

Since yours is already bored 0.040", I'd suggest finding a new block unless you've got a hookup for sleeving it (and can't find another good block for cheaper).

[spittinfire]

I was afraid of that because that means pistons and if I’m
buying pistons, I’m not far off from buying rods too. Then my cheap build gets thrown right out the window.

[Stinger]

If you find a good shortblock then you don't need any of that.