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Interesting... On occasion now I noticed you are at NJMP when I'm at Pocono. We need to run into each other at the track someday being that we're in the same state...
Anyway, yes, anytime I am cresting a hill during or before a prolonged high-G turn, I get fuel cut. You'll find me topping off the car with gas before every session - it helps minimize it. I do go through a half tank for every 20min session. Annoying to keep refilling but that's the game.
There aren't many people here pushing their Z4s to the limits with "stock" tank/pump configs like us that can speak to this. Once you start pulling high G's, it seems we're on our own.
The good thing is for me, it happens on queue in specific parts of the track. I can actually predict it, time it, and sometimes apply 70% throttle for 1-2 second on corner exit (instead of 100%) and issue is resolved.
We're just reaching the limits of the OEM system in imho.
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