Thread: G42 JB4 or JB+
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      11-16-2023, 02:57 PM   #4
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Quote:
Originally Posted by HawksG42 View Post
I’ve tried searching for this topic because I know it’s been beaten like a dead horse but I can’t seem to find it.

My question is if I have no intention of E85 mixing and don’t have access to anything higher than 91 octane, is a JB4 even beneficial for me?
Jb+ adds more boost

the Jb4 adds more boost and a lot more features. whether its enough for you to pay extra for it is a personal option. Here are some of the extra features

extra safety failsafe: goes back to stock map to protect your engine, if your turbo overboost or your fuel pumps fail and cannot provide enough fueling

max boost by gear: you can set your max boost for improved traction. Keep in mind, more power is good but if you cannot get decent traction, it won't help

boost by rpm: allows you to adjust the boost for a smoother power delivery.

datalog: the JB4 provide more power because it can monitor the different car paratemers. With the Jb+ you have to be safe since you are adding boost blindly. with the Jb4, you can be a lot more aggressive
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