Any update on this?
Thinking of going M40 route and curious to see how well it tunes with a JB4.
Thanks
Quote:
Originally Posted by FSociety
Correct jb+ ($200) or Dinan+ ($300) wont do much because of a few reasons i wont go into much detail. I've been testing JB4 with Terry since early May, there's minor gains with 93 i will be creating my own thread in a few days since I've been in testing phases.
I've dyno'ed and raced at the drag-strip with JB4 map1, map2, map5, map7 in 93 octane and also with e85 blended in..
The gains in my stock X4 M40i with only jb4 are noticeable with good e85 otherwise, 93 octane and jb4 its just ok for daily driving. Also map5 does not work in our (auto-tune) due to our higher factory boost.
Map7 is only meant for 100+ octane or enough e85 to make your octane at least 98.
Unfortunately I don't live near Dinan and their piggyback tune won't allow any flexibility that I have with a Flash(Custom Tuning tables). JB4 has pros/cons like everything and desperately waiting for a proper M2/X4 M40 firmware with support on our higher boost levels.
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