[HawksG42]

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?

[HawksG42]

Or…… do I get the JB4 just in case

[Aramis1919]

I reckon the JB+ offers more or less what the JB4 offers.

Mine is set at the 3 o'clock position and offers an additional 3.5 PSI of boost.

My unit cost £25 from Ebay.

[mike@x-ph.com]

Originally Posted by HawksG42

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

[Aramis1919]

Originally Posted by mike@x-ph.com

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

I agree that JB4 is superior to JB+.....but for 25 quid and 5 minutes to fit it I can't complain.