Quote:
Originally Posted by MBWORLDZ2019
I have the same 2011 535i but the only changes I have is the charge pipe. I heard in order to max the power from the JB4, you need at least 93 Octane? What if you only use 91 octane, would it be a problem. I always hate the throttle response on the car , I used the sprintbooster and I actually love it. I wonder if the JB4 will do the same as the sprintbooster, remove the throttle lag.
What is your recommendation? Should I use JB4 stage 1 first to test it out ?
or try out the JB+ or even the Dinantronics tuner.
Any help will be great.
Thanks.
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JB4 map 2 requires highflow catted dp or catless dp. 91oct should be fine. If you don't plan on running catless dp, than why not go with MHD or BM3 and leave the obsolete JB4 behind? Plus you can only run map1 or map 5 without the right downpipe. Only benefit of JB4 is if you plan on running meth or port injection. If none of those in your future plan than ditch JB4. Hell even new meth systems come with their own dedicated controller anyways.
Oh, JB4 doesn't remove throttle lag for 2011 cars or at least in my experience with it as I have 2011 535i xdrive but not a JB4 anymore.