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Alan L Alan L is offline
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Join Date: Apr 2006
Location: New Zealand
Posts: 3,261
I may have solved the problem. I am trying to get hold of this local 930 with no luck so far.
But I took mine for a quiet drive down the road in the pre boost zone and light throttle and watched the AFR (that gear is worth its weight in gold). It sat around 14 and then always leaned off for a considerable period under light throttle. I concluded maybe the fuel piston was not able to respond quick enough to the throttle plate movement - lagging too far behind. I set all my fuel pressures by the book when I went thru it - because they were all well out of range at the high end (120 psi system etc). So I have dropped my warm WUR pressure by 10 psi (not boost pressure). The AFrs seem better and the car definitely feels better. They take a short hike towards lean and come on with fuel much quicker (the lag time in fuelling up is shorter). Hard to know on your own on a road - so will try out on track again at first opportunity - but I am sure it has improved.
I will still try and get the local 930 for a comparative run.
Old 06-19-2008, 10:27 PM
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