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Alan L Alan L is offline
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Join Date: Apr 2006
Location: New Zealand
Posts: 3,261
My old battery was not that bad. It could start it easily, and after fiddling with various settings etc, it would crank it over at extended periods for about 6-7 times before showing signs of not wanting to go, before the car fired. So, it was on the way out, but still had useful life. But threw the static CIS readings right out by reading all pressures lower than it should. So, if you want to do static CIS numbers, at least on a 930, the battery should be in good nick. Mine was fully charged - I leave it on a low rate charger all the time it is not used. But their capacity to sustain high draw off diminshes, even when fully charged - they just can't hold enough to sustain draw off. A 930 would require at least twice that of a 911 for the test.
Old 07-31-2008, 11:57 PM
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