JB4 V15 B58 Firmware Updated

Gearbangin

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Playing with the new updated for JB4 got that Fuel it Kit and E85 going on after quarantine. It hits hard from a dig traction issues even on the R888Rs 295s. Spinning hard no brake boosting or launch control. 0-60 3.85 seconds. On Map 3.

Anybody else playing with it? I cant wait to get the E in there and try Map 5.

See attached Terry and the Fuel it Z4 are making almost 500 whp without a flash. Pretty impressive. Bottom two pics.

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absaifan

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I'm running the new firmware on 93 fuel and 19psi, very good pulls and consistent, better than the old firmwares, the only issue I face is the boost spiking after gear shifts, especially if I manually shift, I'll hit 28psi easy and alot of the times will limp later on.
 
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Gearbangin

Gearbangin

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Im pretty sure that spike is when the throttle is closed and is normal. Its not a true spike.
 

absaifan

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Im pretty sure that spike is when the throttle is closed and is normal. Its not a true spike.
Affirmative, now the only issue is, that clubbed with the CatlessDp, and you directly go into a bad limp mode, no boost and when that happens your tuning halts, you have to reset the codes and drive for a long while until limp mode is gone.
Whne the same spikes occur on the stock dp, I never get the limp mode.
 

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