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Didn't realise I posted on this 2 years ago, still not solved 100%!
That was with completely stock fuel system and N/A E85 only. I'm now turbo so has become much worse obviously. In hindsight, not sure why I went FI but that's another story...
Started with a DWxxx (don't recall the number, 65c maybe) pump fitted in the original bucket
Added a second OEM bucket setup on the opp side, feeding back to the pickup but made it worse. Don't know exactly how it was setup in the tank tbh.
Then replaced the DW with another original bucket setup out of a wreck as we thought maybe the original bucket and o-rings had been butchered to fit the DW pump and was causing issues. Still no good.
Effectively the car is undrivable in its current state anywhere with constant left turn as the combination of E85, turbo and grip means having to lift for so long I end up almost as slow as a stock car!
I'm thinking in theory both my OEM pump setups feeding an external surge tank (2-3L maybe?) would have it being supplied left and right. Return back to the OEM tank so it doesn't pressurise (which I assume is what you want to avoid) should solve the problem in theory but I don't really want to waste any more money for a maybe.
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