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      11-11-2012, 05:05 PM   #27
hotrod182's Avatar

Drives: 07 335i, 06 M3
Join Date: Dec 2006
Location: California

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Originally Posted by TDIwyse View Post
Lots of info on that out there to compare propane vs Nitrous vs H2O/methanol. Tend to not be convinced propane is a good option, but have no direct experience with it.

Aspects I like about the water injection are the cleaning properties and EGT/particulate reduction. Direct injected, EGR equiped engines can get carbon build up in the intakes very easily and the water injection helps keep things clean, as well as reduce peak cylinder pressures when extra fuel is being added. Direct measurements with the BT tool show good EGT reductions on the D.
You are running 70% water? Is there any advantage/harm in trying 100% methanol?

Also, my car is due for the EGR recall, programming update. Any feedback on whether this increases/decreases HP? I know half the owners have complained about mpg decreases.

I was looking at the new mixer diffuser they install during the recall, doesn't that thing look restrictive? Has anyone tried running without it?
Attached Images
2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2017 i3 Terra
2008 Black 335i Sedan. 11.11@ 129.47 mph
2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph (N54 stock turbo trap speed WR)
60-130mph: 6.95 seconds stock turbo WR (.16% slope)