Quote:
Originally Posted by Hags86
Stay with 12.5:1 because
- smaller turbo for same power
- smaller turbo spools faster
- you get a high compression NA engine at the low rpm range rather than a low compression NA engine before the turbo spools
- the direct injectors don't work so great at different compression ratios
- e85 and DI does an amazing job of preventing detonation which is the only reason to lower static compression ratio
I honestly can't think of a single good reason to lower to 10:1
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To add to that... higher boost pressure = more heat in the intake charge too.