PxcesYT

I have a 2020 C43 and I installed just the JB4 mod and I didn’t feel any difference at all. Fortunately I talked with Terry and I got a Boost Control Module. I’m hoping this works will plan to set it all up the first of July. Also if anyone else has a 2020 C43 with a JB4 did you have the same problem?

gabemcclintock

Had a 2019 with a JB4 and sold it because of this very thing...didn't feel much in terms of gains like I did on my 2018. Would love to know how it feels for you once you get the BCM installed. Was told by Terry that adding the BCM would bring it back to the gains felt with the pre-facelift models.

Keep us posted.

BMS

BCM is a big difference maker for the facelift models.

c43PDX

How does the BCM work? Is it controlled via the hand held or bluetooth? I'm probably going this route until AMR can get an update for the 2020.. How much WHP/WTQ gain should I expect with the JB4 on the 2020's? Do we have more potential than the PFL with the bigger turbo's? Are stock internals pretty strong for more boost?

BMS

The BCM plugs in to the JB4 harness and in to the easy to reach boost solenoid so the JB4 can adjust wastegate dutycycle directly rather than having to reply on the mapped-too-low factory tables.

PxcesYT

So I’ve installed the BCM and JB4 still don’t feel much of a difference. Maybe it’s too early to tell. Does anyone know when I can use Map 2 do I need something additional to use Map 2 properly?

PxcesYT

Would you know how much psi I should be pushing in terms of map 0, map 1 and map 2?

TModelle

Very first post on the BMS forum.
https://www.n54tech.com/forums/showthread.php?t=28003

batman719

What firmware are you running?

1Gunner

I have a 2020 with JB4 installed.
I am curious about getting a BMC.
Does it require constant adjusting and monitoring or is it simply plug it in and play?

batman719

* BCM.
It's plug-and-play. It connects just like the other connectors from JB4 going to the MAP sensors.

1Gunner

Ok thanks.
So, once it is installed it requires no further adjustments?

batman719

Right. If it were me, I would run logs and send them over to BMS for a sanity check, but there is no further manual adjustment needed for the stock maps. If you are working with BMS toward a custom map, that's a different story. Make sense?

TModelle

It does not require any adjustments.

PxcesYT

I’m currently running the JB4_MB_C_4.hex

batman719

That's the correct firmware. Strange you are not seeing any difference. I would reach out to BMS support via email if I were you.

PxcesYT

Question do you mind sending me some map 0 and map 1 tests and also when did you start running map 2?

BMS

As far as I know still waiting to see his map0 and map1 logs I requested above.

batman719

Seeing my logs isn't going to help you. BMS is clearly trying to give you a hand here.

PxcesYT

No I know that but I just wanna see how your car performs.