Quote:
Originally Posted by MoreGAS
Well it kind of appears you may have 98 MM 3.4 P/C combo as they may be 98s w that small dome(stock 97 mm do not have that nor a valve pocket) ? Did you get any other doc's when you bought the engine? I mention this as finding singles of those 98s , assuming only need 1 P/C pair may be harder to find...
Also, my experience w this situation is more akin to a cutting torch blowing a hole sideways through the cylinder , and it looks just like that, not a crack. Also often the ring lands of a piston or two will fall out in pieces when you pull the cylinder off....
The cylinder appeared to crack like a walnut. We lean more toward keeping the cylinders as strong as possible for a Tbo to improved power (leave 97mm, this is what we built last ) and stroke it for larger displacement 76.4 to maybe even 78.4 mm , or bore the case larger 2mm and make custom liners to 99 or 100 mm in stronger material pressed in ALum liners(on the drawing board) You can always increase the Boost 1 PSI to make up for the slightly smaller than 100 MM Bore size.
You'll have some deeper discovery to do ahead and not looking like a cutting torch hit it is good news !
Be well
Kevin
GAS Motorsport
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Yes, was sold to me as 3.4. Original owner stated slightly higher compression than stock 930 so to have a bit more more off boost.