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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,232
To reduce the compression ration one trick I have tried successfully is to use the turbo cylinder barrel shims under the cylinder jugs where they meet the case. Normal shims are copper and 0.020 thick, I think the turbo shims are 0.050. This will effect your deck height and lower compression, or figure out how many shims you will need and possibly stack them. You cannot go too far here because all this will effect your timing chain housing sealing with the camshafts....but it may be enuff.
1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 03-11-2008, 08:44 AM
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