[E90ROXS]

Originally Posted by B58

As far as I know, MHD back end flash + JB4 has the lead on making the most power with just E40 and a intake. I haven't seen a flash produce almost 470whp with a stock down-pipe. It's a very underrated setup as we all know MHD + JB4 still holds the record for the fastest N54's. Piggybacks like JB4 aren't junk because of throttle closures and such that's due to the stock DME limitations and I can reassure you that no longer exists with my current setup and it never has even prior to flashing with the BEF. If you really think about it.... JB4 is pretty damn good for being able to control boost, boost by gear, custom boost target map, valet mode, fuel pressure crash safety map, meth fail safe, and meth control. What more can you ask for paying $500 or around $300 for a used one?

Currently running the MHD BEF + JB4, E40, catless DP, BMS intake, and 100% meth injection and I'm almost certain it's at 500whp with only 19-20 psi. I did not dyno the car because I'm installing a Pure stage 1 this weekend and I'll be making a DIY video for those that plan on doing it later on

Thank you for the DIY sir!!!!!

[B58]

Originally Posted by E90ROXS

Thank you for the DIY sir!!!!!

Working on it.... sorta tough because the battery ran out while I was removing the turbo haha, but it's pretty straight forward and easy.... it's not the greatest DIY video, but it's better then nothing and it will give you a more clear vision swapping out the turbo.

[coryjoon]

hese can be electronic or manual and allow you to adjust the boost level independently of your ECU tune. They are usually more affordable than a JB4 and offer a straightforward approach to boost management.

[B58]

Originally Posted by coryjoon

hese can be electronic or manual and allow you to adjust the boost level independently of your ECU tune. They are usually more affordable than a JB4 and offer a straightforward approach to boost management.

5 year old dead thread