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JBoe JBoe is offline
Junior Member
Posts: 228
Join Date: May 2018
Car: M240i
Default 09-26-2018, 09:04 PM

I only have them when boost spikes a bit, but that's OE design. Otherwise nothing. Stock, I had more closures than with the JB4 on any map 91 Octane could handle. Finally got octane and WMI installed. Now it's a beast and my logs can prove it.

Biggest issue is that the B58 is a tricky machine to tune. Stock DME does a lot to keep it engine safe. A little overly safe IMHO. JB4 cleared up a lot and fine tuning it allowed me to go further than I ever thought I would with this engine/car.
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