Quote:
Originally Posted by beetle6986
I've been running JB4 for years.
When I first installed it, always ran map 1. Then I went to map 2 after the DP install. These both required only pump gas I thought (no more than 10% ethanol).
Now I typically run map 5. Sometimes with 93 octane and sometimes with a mix of Ethanol. How do I know which MHD BEF I can run. Can I run the PUMP flash and still use map 5 with ethanol or gas? or is the pump flash only for 93 octane and the e85 flash is only for ethanol mixes? Is there any guidance for which BEF to run with which JB4 map?
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I had these same question but now I know, anyways you can run the pump bef for mhd it can use up to 30-40% e85 mix (PUMP: Suggested for most applications ranging from 91/93 octane up to E85 mixtures of around 40%.) , once you do a bef you would use map 2 since it is a high boost map
With the BEF, Map 1 is ~16 PSI (normally 13), Map 2 is ~19 PSI (normally 14). I found Map 5 to be very similar to Map 2 (running ~E35), but Map 2 is more consistent. The BEF also adjusts fueling, timing, VANOS, etc. Shoutout to
lucasmiller2015 for that response when I had the question
You can check more stuff out here:
https://www.n54tech.com/forums/showthread.php?t=43151