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Join Date: Sep 2012
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Occasional buck/surge/lurch when lifting under boost

One more little thing that is going on with my car - as I've mentioned in other threads - I think my WUR tuning is pretty much where it's going to be. Car is running great.

But occasionally when I lift when at WOT and high boost the motor will buck - I would say it is more drastic than a surge or a lurch. I have a brand new bypass valve (note - car is a 964T so a different bypass valve system than the 930's use). I would say it seems to happen when at a high boost and I lift suddenly or quickly, but not so much if I lift slowly.

While in the middle of the tuning process I seem to recall this happening more when it was running richer - so maybe I should go a little leaner?? But maybe I'm way off...

My wastegate was apart recently when fredmeister modified it and he said the diaphragm was good.

Any input appreciated. Thanks!

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Brandon
'91 911 Turbo
'00 Audi S4 highly mod'd DD
Denver, CO
Old 05-20-2013, 02:21 PM
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