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Posts: 6,145
Join Date: Oct 2013
Car: e90 335i
Default 07-11-2019, 02:06 PM

Originally Posted by P4RTYH4RTY
I recently uninstalled then reinstalled my JB4, and now it feels like there is a lag until 4K rpm. It feels a lot like VTEC; not much going on until after 4K, even at WOT. Iíll usually start my pulls in 2nd gear @ 3k rpm. I donít remember it feeling like this the first time around with the JB4. Did I just forget, or is this normal?
Can you get a log so we can check it out? What map and fuel are you using?

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