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BMW 3-Series (E90 E92) Forum
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02-25-2015, 11:09 AM | #2 |
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02-27-2015, 09:54 PM | #3 |
Second Lieutenant
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I just installed my JB4 today and only have used map 1 so far... but from my research I would think Map 5 would perform better assuming you get traction. Also I would think launching in first again, assuming you don't overrev, get a decent launch and not too much wheel spin. as for brake boost, don't really know what to say but with all of the above... My suggestion is find a good/safe place to do a little testing. Keep in mind the track should be stickier than the street. See which map feels better... try 1st and 2nd launches and see what works out better. try brake boosting at a few different rpm level's and see if you wanna try that out. Also may want to let a little air out of your rear tires (all of this is assuming you are RWD). Not sure how much but I would think maybe going like 25 psi or so might be good amount.
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08 335xi- CP-E DCI's,VRSF 7" FMIC, UR Charge pipe w/ Tial Q BOV, JB4 G5, PE mod, 19" Sonic Tuning SC 7 wheels
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