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Old 12-09-2020, 05:54 AM   #94
78F350
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Join Date: Jul 2014
Location: Oklahoma
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It's all awesome! I think it may be about time to change your signature:

Quote:
1997 2.5 Boxster NASA Time Trial track car
2003 911 C2
NASA HPDE Instructor
I was talking with one of the GRM guys in person (pretty sure that it was 'Stafford1500') about boost with the Audi 4.2s. He mentioned changing the head gasket to adjust the compression. I don't remember the details, but I think that he recommended a thicker gasket to slightly reduce the compression. If you are boosting a stock 4.2 now, you may want to look into that for when you build up the replacement engine.

There may be a few guys on the AudiWorld Forums that have the forged internals tucked away. "audinutt" offered me a set about three years ago, but at the time I didn't plan to tear down an engine. It may be worth asking. If they see your build they will probably be happy to help out.
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