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      02-14-2013, 05:31 PM   #19

Drives: 2007 e92 335i
Join Date: Aug 2012
Location: Queens Village

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2007 335i  [0.50]
Originally Posted by themyst View Post
I've run an E45 mixture with stock fuel system (7-8 gallons or so of summer blend E85) I leaned out badly on RBs at around 19 psi north of 6000 RPM. Surprised it didn't lean out much sooner. Once I threw meth into the mix (CM10 nozzle, 800cc/min) my trims went negative. Meth = ultimate fueling band-aid!

I would guess it would lean out much sooner if I upped the methanol mix. Don't think it really matters though, I was running near 15 degrees of timing in the mid-range on that E45 mix and nary a peep out of my knock sensors, so there is a bit of diminishing returns at play here.
Hey guys.. What does it mean to lean out? Im fbo, g5 iso n i run 50/50 e85... Just curious