Jb4 question
Senior Member
Joined: May 2004
Posts: 474
Likes: 36
From: Central Ohio
2017 C43, 1966 230SL, 2006 Jeep Rubicon
Member
Joined: Mar 2020
Posts: 199
Likes: 75
Acura TL-SH, among others
There are a lot of tunes that don't remove the limiter, especially among the ones that are "tamer". We all know the M340i is easily faster than the C43 when both are bone stock. Take a look at this M340i thread with quarter mile times. You'll have to roll about halfway down the first page to get to cars that are stock. Ignore the cars that are modified:
https://g20.bimmerpost.com/forums/sh....php?t=1880559
Your car is running as fast or faster than the stock cars there. As for getting a car CPO, with a tune, that has definitely happened before. Here's a thread from this site on exactly that issue:
https://mbworld.org/forums/w213-amg/...tuned-ecu.html
https://g20.bimmerpost.com/forums/sh....php?t=1880559
Your car is running as fast or faster than the stock cars there. As for getting a car CPO, with a tune, that has definitely happened before. Here's a thread from this site on exactly that issue:
https://mbworld.org/forums/w213-amg/...tuned-ecu.html
Junior Member
Joined: Mar 2022
Posts: 30
Likes: 15
C450 AMG
Yeah that's quicker than stock for sure. I'm running a Dinan Tune on my C450 which is just more of an entry thing and my best logged time on Dragy was 4.39 for 0-60. Either that or your car is an anomaly.
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Thread Starter
MBWorld Fanatic!
Joined: May 2021
Posts: 1,317
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From: Plainfield IL
Amg C43
BMS went through my logs when I wasn’t getting the improvement I wanted, and they said my boost levels looked proper on map 0 and improved on map 2.
so who knows what’s going on
so who knows what’s going on
Senior Member
Joined: May 2004
Posts: 474
Likes: 36
From: Central Ohio
2017 C43, 1966 230SL, 2006 Jeep Rubicon
They didn't mention any fuel data or any other aspects of making more power? They say (even boast with pride?) on their web site that they're not a simple boost increasing system, but that they take many more aspects into account to create a harmonious (my word) solution to increasing power. I don't have a JB4, but am looking into it and reading a lot of threads on it. I would think that they could tell from your map 0 data if you had a tune because the boost, fuel, air, throttle position and other sensors, related to speed, would give it away. (Actually, your 0-60 and 1/4 mile give it away!) That's an assumption on my part, but it makes sense. Maybe they don't measure vehicle speed in their logs, or other things that would be telltale signs of an over-performing engine vs. stock. It seems to me that that is their whole business. 
Thread Starter
MBWorld Fanatic!
Joined: May 2021
Posts: 1,317
Likes: 200
From: Plainfield IL
Amg C43
Guess & check
just like 3rd grade math.
Mph is on the logs but I’ve heard the logs aren’t a good 0-60 or 1/4 mile timer.
It is strange how there is such a wide range of results that imo should all be much closer.
but then I guess my car shouldn’t have run the 0-60
Times that it has 🤷🏻♂️🤷🏻♂️🤣🤣
just like 3rd grade math.
Mph is on the logs but I’ve heard the logs aren’t a good 0-60 or 1/4 mile timer.
It is strange how there is such a wide range of results that imo should all be much closer.
but then I guess my car shouldn’t have run the 0-60
Times that it has 🤷🏻♂️🤷🏻♂️🤣🤣
Junior Member
Joined: Sep 2021
Posts: 64
Likes: 13
C450 AMG
