Originally Posted by cwhit122 (Post )

Sheesh so my bolt ons would only net me only 10-15 hp vs a stock car running JB4 ��

Originally Posted by cwhit122 (Post )

Gotcha, so to truly see major power improvements would be pure turbos and more fuel options? All I ever seen was getting *** less ********* would net so much HP from the restrictive OEM ones. Maybe that was from a flashed car or combo of both with a jb4 integration. As always thanks for the good replies.

Originally Posted by Antec800 (Post )

Noticed the same issues doing runs tonight on map 2? Any solution?

Originally Posted by zse8h (Post )

BMW finally got around to upgrading my software to 07/2021.20 from 03/2021.40. I noticed immediately how firm the car's stance feels while driving and how smooth the car drove and shifted gears. Testing is with no JB4 as I had to take that off for a visit. But the car feels so much easier to control, and the power on stock felt beefy compared to the previous software. Dare I say it felt like a different car??? Anyhow, this is just my first impression after driving it a few hundred miles on no tune and just a software upgrade.

Fast forward to today, 19 Jul 21. I drove the car a good bit before work on the way to grab some coffee as I wanted to test the car's balance with a new rear sway bar. I want to say this investment is well worth it. It took 1 hour to install, using a lift and making sure my 4-year-old didn't run into the street.

Altogether, it was four bolts and two nuts. The bar itself was tricky to remove once unbolted. The driver-side control arm needed raised an inch to slide the bar out.

I hope this is informative.

Zach

Originally Posted by Boosted_8 (Post )

My current theory is gearbox torque limiters. Xhp support for the current 8speed ZF boxes is due in the next couple of months. My plan is to settle that asap

Originally Posted by Tomholland (Post )

Have you tried turning traction control completely off and not use launch control?

Originally Posted by Boosted_8 (Post )

I went for the OEM F90 bars front and rear in the end. I had them fitted with front camber arms and a geo setup. The shop said they went right on with the M5's brackets and a combo of the drop links from both cars.

Originally Posted by Boosted_8 (Post )

I genuinely do need the ground clearance and compliance of the M550i suspension, shorter higher rate springs are a no go. With continental sportcontact 7 tyres and lighter forged wheels in place of run flats and the cast iron 668s, the ride is so so good.

Regarding map 2. It never ran right for me. It asks for +6lbs everywhere and even with 101ron (94+2 points of boostaine ) the boost came at the expense of timing and the car was slower. I have the stock primary cats still in, everything else in the OEM exhaust is out of the way.

Originally Posted by Terry BMS (Post )

The fuel limit we're fighting on the JB4 end is with fuel trims. So flashing the ECU would certainly help. As would adding external fuel like WMI or CPI. I don't know where the fuel pressure limit is yet but I'm sure that's well above 600whp.

On the required connectors yes we have them, email me your address and we can send a pair out. Payam is going to make a video on how to attach them to the JB4 harness.

Originally Posted by Pushin' B (Post )

Terry, does this log look a little sketchy? (26lbs was not intended and has not been ran since) Trying to determine safe max boost targets for this platform on an M50i. Currently running a map 6 with 7.5 additive from 4,5 to 5,5K, tapering down to 6 by 6k.