c63 JB4 +downpipes
Thread Starter
Junior Member
Joined: Oct 2015
Posts: 55
Likes: 4
From: Greater Sacramento
2016 c63
c63 JB4 +downpipes
Hey guys,
So I just recently purchased downpipes for my c63 (not S) and was looking into tunes. I was considering Eurocharged but coming from the 335is tuning world I had to peep at what burger tuning was doing for the car.
My concern is, if I use the jb4 to up the boost, do I have to worry about the transmission not being flashed? I know back when i had my bimmer with the dual clutch, everyone was saying to flash tune the transmission with MHD and then use jb4 to control the boost.
So would an ECU flash be better for the over all health of the car? or just jb4, up the boost and send it??
---Id have to ECU flash for extra burbles or does jb4 have a fix for that?
Thank you!
So I just recently purchased downpipes for my c63 (not S) and was looking into tunes. I was considering Eurocharged but coming from the 335is tuning world I had to peep at what burger tuning was doing for the car.
My concern is, if I use the jb4 to up the boost, do I have to worry about the transmission not being flashed? I know back when i had my bimmer with the dual clutch, everyone was saying to flash tune the transmission with MHD and then use jb4 to control the boost.
So would an ECU flash be better for the over all health of the car? or just jb4, up the boost and send it??
---Id have to ECU flash for extra burbles or does jb4 have a fix for that?
Thank you!
MBWorld Fanatic!
Joined: Jan 2017
Posts: 1,117
Likes: 182
Mercedes-Benz E63s AMG
JB4 advantages - meth, boost by gear, resale
ECU advantages - easier install/uninstall, supports downpipes (Stg2), burbles 🎶
Some will argue that you can datalog on JB4, but you can just buy a cheap OBD2 reader and datalog your ECU tune for $50.
ECU advantages - easier install/uninstall, supports downpipes (Stg2), burbles 🎶
Some will argue that you can datalog on JB4, but you can just buy a cheap OBD2 reader and datalog your ECU tune for $50.
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Joined: Jun 2014
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From: IL
19 E63s, 23 M3 compX, B9 SQ5
ECU tunes are always superior to piggybacks. No hesitation with full WOT in any gear because you're not "tricking" the computer with adjusted parameters on actual readings. Best of all, no mess of wires all across your engine bay.
AFAIK, JB4 can't code out the CEL for catless downpipes. You can run them, but you will have a CEL. ECU tunes will code it out completely.
AFAIK, JB4 can't code out the CEL for catless downpipes. You can run them, but you will have a CEL. ECU tunes will code it out completely.
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Joined: Nov 2016
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
I personally have never experienced any perceivable lag with JB4 and found absolutely no difference in response between a full tune and JB4 after trying both. I find ECU tunes change the characteristic of the power delivery way too much for my liking, cause most of these tuners do not know what they are doing unless you are going to someone like Renntech. With the JB4 the power and torque curve still has the same shape except now I have greater peaks, which in my case is exactly what I wanted. I tried two full tunes, and both of them caused clunkier and hesitant shifts as these tuners do not give a rat about how the TCU perceives their tune.
Also to my knowledge no ECU tuner for this platform currently tunes the TCU separately.
Also to my knowledge no ECU tuner for this platform currently tunes the TCU separately.
Last edited by munis; Jul 30, 2019 at 10:22 AM.
Member
Joined: Aug 2018
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From: the Right coast
'19 C43
With catless (and even high-flow catted) downpipes, you will get a CEL unless you have a flash tune. The JB4 won't suppress the CEL. Just something to keep in mind since you mentioned you purchased downpipes.
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2018 C63 Cabriolet
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Joined: Mar 2019
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From: Earth
2018 C63S AMG
I personally have never experienced any perceivable lag with JB4 and found absolutely no difference in response between a full tune and JB4 after trying both. I find ECU tunes change the characteristic of the power delivery way too much for my liking, cause most of these tuners do not know what they are doing unless you are going to someone like Renntech. With the JB4 the power and torque curve still has the same shape except now I have greater peaks, which in my case is exactly what I wanted. I tried two full tunes, and both of them caused clunkier and hesitant shifts as these tuners do not give a rat about how the TCU perceives their tune.
Also to my knowledge no ECU tuner for this platform currently tunes the TCU separately.
Also to my knowledge no ECU tuner for this platform currently tunes the TCU separately.
MBWorld Fanatic!
Joined: Nov 2016
Posts: 1,527
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
Thread Starter
Junior Member
Joined: Oct 2015
Posts: 55
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From: Greater Sacramento
2016 c63
Also, is there a difference to how the car would react in comfort, sport, sport + or will it be all the boost all the time?
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C63S
My car currently dyno’d at 860hp on a hub dyno with a 100% standard transmission.
Former Vendor of MBWorld
Joined: Dec 2005
Posts: 827
Likes: 152
From: Simi Valley, California
2018 C63 Sedan
Hey guys,
So I just recently purchased downpipes for my c63 (not S) and was looking into tunes. I was considering Eurocharged but coming from the 335is tuning world I had to peep at what burger tuning was doing for the car.
My concern is, if I use the jb4 to up the boost, do I have to worry about the transmission not being flashed? I know back when i had my bimmer with the dual clutch, everyone was saying to flash tune the transmission with MHD and then use jb4 to control the boost.
So would an ECU flash be better for the over all health of the car? or just jb4, up the boost and send it??
---Id have to ECU flash for extra burbles or does jb4 have a fix for that?
Thank you!
So I just recently purchased downpipes for my c63 (not S) and was looking into tunes. I was considering Eurocharged but coming from the 335is tuning world I had to peep at what burger tuning was doing for the car.
My concern is, if I use the jb4 to up the boost, do I have to worry about the transmission not being flashed? I know back when i had my bimmer with the dual clutch, everyone was saying to flash tune the transmission with MHD and then use jb4 to control the boost.
So would an ECU flash be better for the over all health of the car? or just jb4, up the boost and send it??
---Id have to ECU flash for extra burbles or does jb4 have a fix for that?
Thank you!
Member
Joined: Mar 2018
Posts: 165
Likes: 15
From: Temecula, CA
Current: 2017 C63S Prior: 2016 CLA45, 2015 Evo X Final Edition
No need to flash the trans, we have no issues holding 560whp on our C63 JB4 only. Other advantages of the JB4 include the ability to install and remove without a trace when needed, resale value, and the ability to adjust your own tuning on the fly with the app. You can run map1 to keep it fast but conservative most of the time then flip to say map3 when you have race gas at the track for kill mode.
Your C63 is running 560whp with only a tune? That seems a lot higher than a lot of people with just tunes are running in here.
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From: Germantown, Maryland
2012 P31 C63
Former Vendor of MBWorld
Joined: Dec 2005
Posts: 827
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From: Simi Valley, California
2018 C63 Sedan
More info and data on test results here:
https://www.n54tech.com/forums/showthread.php?t=55094
-Payam
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Joined: Jun 2014
Posts: 1,589
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From: IL
19 E63s, 23 M3 compX, B9 SQ5
Tune only with e30 blend it did ~540whp.
More info and data on test results here:
https://www.n54tech.com/forums/showthread.php?t=55094
-Payam
More info and data on test results here:
https://www.n54tech.com/forums/showthread.php?t=55094
-Payam
Any 1/4 mile times compared to stock with this setup? Dyno numbers are meaningless.
Former Vendor of MBWorld
Joined: Dec 2005
Posts: 827
Likes: 152
From: Simi Valley, California
2018 C63 Sedan
If you click the link it will show you our modified numbers. 11.5@127mph, so you can already tell it's making some power with that trap.
-Payam
Thread Starter
Junior Member
Joined: Oct 2015
Posts: 55
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From: Greater Sacramento
2016 c63
I saw that the jb4 app has a feature to read codes? Will that not remove the CEL?
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Mercedes-Benz E63s AMG
Damn how many times do I have to say this on the forums lol
MBWorld Fanatic!
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
Passive delete only works outside of US. You can open an itunes account registered in Canada and download the app, then it will remove the CEL for you.
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