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      11-26-2012, 05:31 PM   #5
Second Lieutenant

Drives: 335i e92
Join Date: Nov 2012
Location: CA

iTrader: (3)

Originally Posted by boostbuddy View Post
Took the plunge and installed my JB4 last Wednesday (while g/f was putting up my roof Xmas lights - now that's dedication). The install required the video and the hard copy instructions. It took me 2.5 hours, although I took my time to make SURE I got it right the first time. I can honestly say it should be about 45 min next time. It's kind of scary digging into the guts of the DME.

I wanted to try Map 5 with a blend of 40% E85 (which is available less than 5 miles away) and 60% 91 octane, but I ran out of time. I ran on Map 1 and Map 5 and didn't notice much difference running straight 91. I logged about 400 miles on a long weekend trip and I gotta say I'm very happy with the results. First time on WOT, I saw DTC lights and heard tires chirpping Power delivery is smooth and strong to redline.

I'll report back when I get some E85 in her and autotune on Map 5.

Any reason to not just clear codes and leave JB4 in for routine trips to dealer (I'm CPO for next two years)?
What JB4 do you have? G5 or G4? You are going to LOVE the E85. You won't see much more boost if any on CA 91 and Map 5. With Map 5 and E85 set your boost limit to 18psi and you should be able to peg that with a 40-50 mix and perfect timing. When you need more, think about a DCI and an FMIC.