Ive seen a ton of threads about jb4 vs cobb and ive seen some about the jb4 with a back end flash for added power. Can someone explain how a custom flash works with the jb4? Does the flash work on all of the jb4 maps and make them "better" or just on map 0. I already have a cobb and im just wondering what kind of gains i could get with a flash already installed and a jb4 added
As explained above the jb4 flash controls timing,afr,and fuel scalar while the JB4 controls boost.
Cobb maps are very conservative so jb4 (without the flash ) will give you more power than cobb(OTS maps). Add the jb4 flash and it is not even close.
Of course you can get the cobb to produce as much power but u will either need tuning experience or have to pay couple hundred $ for someone to tune it for you.
the jb4 flash works on all maps even map 0.
you can also get the cobb and jb4 to work together.
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