Jb4 question
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MBWorld Fanatic!
Joined: May 2021
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From: Plainfield IL
Amg C43
Jb4 question
I had the jb4 on for 2 weeks
Feels faster but don’t have great times yet.
took it off to bring it into the dealer and the car feels better/tighter back stock.
anyone else experience this?
the car feels looser / erratic with the jb4, maybe that’s why my 0-60 aren’t improving?
Feels faster but don’t have great times yet.
took it off to bring it into the dealer and the car feels better/tighter back stock.
anyone else experience this?
the car feels looser / erratic with the jb4, maybe that’s why my 0-60 aren’t improving?
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MBWorld Fanatic!
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From: Plainfield IL
Amg C43
Now my best gain was in the 60-130
without 12.27
with 11.10
which is why things are confusing me
i was hoping to be 3.6-3.7 0-60
and 11.5 1/4
i think others are doing these times.
I’ll keep working and logging
without 12.27
with 11.10
which is why things are confusing me
i was hoping to be 3.6-3.7 0-60
and 11.5 1/4
i think others are doing these times.
I’ll keep working and logging
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2015 C400 4MATIC Palladium Silver Metallic
The biggest thing that stands out to me is that the JB4 seems to actually hurt low end performance. My stock 60ft times were a bit better than with the JB4, but my trap speed was higher by a couple MPH.
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Junior Member
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C43
For me Map 1 seemed faster than Map 2, there is definitely a difference with JB4 being off feels less power, but not a huge difference but you can definitely notice when it’s turned off, But for some strange reason Map 1 seem snappier than Map 2.
Last edited by Griley; Apr 24, 2022 at 10:14 AM.
Senior Member
Joined: Mar 2022
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2015 C400 4MATIC Palladium Silver Metallic
Honestly, I have no idea. In my case, all my JB4 passes have been slower than my fastest stock pass when comparing elapsed time, despite the fact that my trap speeds increased by a couple of mph.
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Acura TL-SH, among others
Thread Starter
MBWorld Fanatic!
Joined: May 2021
Posts: 1,317
Likes: 200
From: Plainfield IL
Amg C43
The dealer would not have seen that?
it was CPO, and has been in the dealer many times I’m sure it had some coding done when I got my center Speedo screen replaced.
it was CPO, and has been in the dealer many times I’m sure it had some coding done when I got my center Speedo screen replaced.
Last edited by MaverickC43; Apr 26, 2022 at 09:19 AM. Reason: Spelling
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From: Central Ohio
2017 C43, 1966 230SL, 2006 Jeep Rubicon
Going a hair under 4.0 in 0-60 is also not stock. From what I understand, most magazines had it between 4.4 and 4.8? Others who are more well read can comment on that, but I'm certain that under 4.0 is not stock.
How would one find out what tune has been applied to their car? Is there a digital signature that a Xentry system could read that would identify the company?
How would one find out what tune has been applied to their car? Is there a digital signature that a Xentry system could read that would identify the company?
Last edited by GermanCarShow; Apr 26, 2022 at 11:13 AM.
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C43
Thread Starter
MBWorld Fanatic!
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From: Plainfield IL
Amg C43
Seems strange that would not have been noticed.
and even more concerning is that the fai didn’t improve performance. Most people said you’d see gains with an intake & tune
and even more concerning is that the fai didn’t improve performance. Most people said you’d see gains with an intake & tune
