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Terry @ BMS Terry @ BMS is offline
Posts: 28,116
Join Date: Jan 2008
Default 09-30-2018, 09:47 AM

Originally Posted by Snowman
I asked these questions because i was thinking of getting the JB4 and put it on the car.
However ive done some research now and there seems to be quite alot of reports of throttle closue issues when you combine JB4/tuning boxes and *****ted *********, which i intend of fitting.
So i will just wait for MHD to release their fix and stay away from JB4 at this point.
I have no intention of paying lots of money on a unit that causes my car to run jerky.
So you don't have a JB4 yet nor a log of how your specific car is running but want me to provide you with "hypothetical" JB4 tuning advice? Generally, if running exhaust modifications you'll need to set FUA = 20 to offset dutycycle causing boost to go over target and corresponding excessive throttle closure.

In my testing the exhaust mods added zero power or benefit, I would not suggest them in most situations, whether tuning with JB4, flash tuning, or both.

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