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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
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Originally Posted by RarlyL8 View Post
Could be a confusion of definition between measured boost and absolute pressure. Air pressure at sea level is 1bar. Some gages read in absolute which means 1 bar ambient + 1bar boost = 2bar.

Either way please do not use more than a 1.0bar spring, the stock air cooled 930 engines are not designed for it.
Great point.
I like the VDO gage that reads -0,5 Vacuum to 1.5 bar boost for this reason and like to see the vacuum on th engine when running low load or cruising. The 2.0 bar gage is like having a 200mph speedo in a Toyota Corolla.
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 12-11-2008, 06:36 AM
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