How is the c43 after a Renntech tune?
05-17-2017, 02:45 PM
#26
If one is worried about warranty, why would you pay $2,300 for the paltry gains from a RennTECH reflash (which most likely voids the Mercedes warranty)...
...when instead one could simply get a Dinan piggy-back for only $300 and get about the same power gains, AND it takes all of 5 minutes to remove from the car...with NO ECU REFLASH.
...when instead one could simply get a Dinan piggy-back for only $300 and get about the same power gains, AND it takes all of 5 minutes to remove from the car...with NO ECU REFLASH.
05-17-2017, 02:55 PM
#27
MBWorld Fanatic!
In "Race" mode, the Dinan piggy-back 4.0 psi boost in intake manifold pressure...which indicates to me an actual performance boost. I have not seen any dyno's for the Dinan, nor the RennTECH for the C43. Only statements like this:
Mercedes M276 engine performance when measured, obtains higher numbers than rated from factory
Power gains are calculated with stock numbers measured by RENNtech
Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles
I definitely feel a difference between stock and race mode on my Dinan...all it takes to bounce back n' forth between the two is a quick tap on the smartphone app.
Mercedes M276 engine performance when measured, obtains higher numbers than rated from factory
Power gains are calculated with stock numbers measured by RENNtech
Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles
I definitely feel a difference between stock and race mode on my Dinan...all it takes to bounce back n' forth between the two is a quick tap on the smartphone app.
Last edited by MASSC450; 05-17-2017 at 02:58 PM.
05-17-2017, 03:17 PM
#28
Junior Member
I had a 2014 BMW 335i with a m performance power tune installed by a dealer shortly after purchasing the vehicle.. the engine ate a piston ring at about 15000 miles ... bmw would not cover there own performance package because the car was not stock even though the dealer told me when I got it that it would be 100% covered.. bmw denied the claim.. I tried sueing them but lost..eventually sold the car to my nephew who was a mechanic for cheap.... don't trust the dealer or even the company!!
05-17-2017, 04:57 PM
#29
I believe DVision44 dyno'd his car with the Dinan unit. I want to say I saw him talking about it in another thread but I can't recall.
02-06-2018, 03:38 PM
#30
Man this site is brutal. 21 posts and not one person actually answered op. I've been lurking here for a couple weeks as I'm about to pull the trigger on a 18 C43 and it's almost impossible to get strait answers in any of these threads.
Soooo does anyone that actually has a Renntech tune want to share their experiences? This has to be by far one of the safest tunes out there and will most likely be what I go with despite the price.
And anyone thinking MB will warranty anything with a tune I got some nice water front property to sell you. The "warranty" is from the tuner (in this case renntech), which is assuming liability and is basically saying they will cover it if something goes wrong. But either way I wouldn't have any faith in it and would just assume you are SOL either way.
Soooo does anyone that actually has a Renntech tune want to share their experiences? This has to be by far one of the safest tunes out there and will most likely be what I go with despite the price.
And anyone thinking MB will warranty anything with a tune I got some nice water front property to sell you. The "warranty" is from the tuner (in this case renntech), which is assuming liability and is basically saying they will cover it if something goes wrong. But either way I wouldn't have any faith in it and would just assume you are SOL either way.
The issue was actually the RENNtech harness and problems went away after replacing. No further issues surfaced with the engine or transmission (at least under my ownership) so I can't say what would have happened at that point, but I must assume that it would be on me. Hope this helps! BTW, I'm now driving a C450 which is why I am on this forum.
Note: Before you jump on this post, YES the lesson is there is no such thing as a "Tuner Friendly" MB dealer...If your running a piggyback, take it OFF before you get any service done.
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Chrisk03 (10-09-2018)
10-08-2018, 09:31 PM
#31
Member
I know this is a dated forum but I wanted to share my RENNtech experience as requested. I had the $2500 RENNtech tune on my CLA45 for many of the same reasons discussed here (perception that the relationship with MB would protect my warranty). The tune performed as described and was very well made. I did start having some very weird trouble with my car and took it to my "Tuner Friendly" MB dealer (their words) to help resolve. They were able to duplicate my problem but had no solution. Here is where the trouble started...they pulled in the corporate mechanics to help resolve the problem. While troubleshooting the problem, they (corporate) detected the tune and told the dealership to inform me that I was no longer under warranty for major engine or transmission issues which was recorded/tagged to my VIN.
The issue was actually the RENNtech harness and problems went away after replacing. No further issues surfaced with the engine or transmission (at least under my ownership) so I can't say what would have happened at that point, but I must assume that it would be on me. Hope this helps! BTW, I'm now driving a C450 which is why I am on this forum.
Note: Before you jump on this post, YES the lesson is there is no such thing as a "Tuner Friendly" MB dealer...If your running a piggyback, take it OFF before you get any service done.
The issue was actually the RENNtech harness and problems went away after replacing. No further issues surfaced with the engine or transmission (at least under my ownership) so I can't say what would have happened at that point, but I must assume that it would be on me. Hope this helps! BTW, I'm now driving a C450 which is why I am on this forum.
Note: Before you jump on this post, YES the lesson is there is no such thing as a "Tuner Friendly" MB dealer...If your running a piggyback, take it OFF before you get any service done.
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Chrisk03 (10-09-2018)
10-09-2018, 11:05 AM
#32
With the RENNtech tune, you get a bypass module that plugs in where the tune plugs in allowing you to run the harness without the tune. Same problems existed with the bypass module installed which showed that if there was a problem on the tune side, it had to be the harness. A new harness was installed and the problems went away.
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thxrick (10-09-2018)
08-23-2020, 12:09 PM
#33
This maybe an old thread so I apologize just trying to get some clarification. Looking on RENNtech's website for the 2015+ C43 AMG ECU+ Tune, they state 416HP and 460TQ with their HHT. I know alot of people instantly balk at this and point to other tuner's getting alot more power for their price. The devil is in the details though atleast from what I'm reading. I could be completely wrong so please correct me if so. RENNtech states they achieved those numbers @ crank by including a 17% drive-train loss for 4MATIC vehicles.
Just doing some simple math: 416*.17 = 486HP / 460*.17 = 538TQ BEFORE drivetrain loss. So is the tune really producing 486HP & 538TQ without taking drive-train loss into account? This seems more justifiable for their $2300 price tag. I feel its all a marketing scheme and many other tuners may not account for the drive-train loss. Can anyone else please confirm or am I just way out in left field on this?
Just doing some simple math: 416*.17 = 486HP / 460*.17 = 538TQ BEFORE drivetrain loss. So is the tune really producing 486HP & 538TQ without taking drive-train loss into account? This seems more justifiable for their $2300 price tag. I feel its all a marketing scheme and many other tuners may not account for the drive-train loss. Can anyone else please confirm or am I just way out in left field on this?
08-23-2020, 12:22 PM
#34
This maybe an old thread so I apologize just trying to get some clarification. Looking on RENNtech's website for the 2015+ C43 AMG ECU+ Tune, they state 416HP and 460TQ with their HHT. I know alot of people instantly balk at this and point to other tuner's getting alot more power for their price. The devil is in the details though atleast from what I'm reading. I could be completely wrong so please correct me if so. RENNtech states they achieved those numbers @ crank by including a 17% drive-train loss for 4MATIC vehicles.
Just doing some simple math: 416*.17 = 486HP / 460*.17 = 538TQ BEFORE drivetrain loss. So is the tune really producing 486HP & 538TQ without taking drive-train loss into account? This seems more justifiable for their $2300 price tag. I feel its all a marketing scheme and many other tuners may not account for the drive-train loss. Can anyone else please confirm or am I just way out in left field on this?
Just doing some simple math: 416*.17 = 486HP / 460*.17 = 538TQ BEFORE drivetrain loss. So is the tune really producing 486HP & 538TQ without taking drive-train loss into account? This seems more justifiable for their $2300 price tag. I feel its all a marketing scheme and many other tuners may not account for the drive-train loss. Can anyone else please confirm or am I just way out in left field on this?
08-23-2020, 02:44 PM
#37
08-23-2020, 03:04 PM
#38
08-23-2020, 03:32 PM
#39
08-25-2020, 03:24 AM
#42
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This maybe an old thread so I apologize just trying to get some clarification. Looking on RENNtech's website for the 2015+ C43 AMG ECU+ Tune, they state 416HP and 460TQ with their HHT. I know alot of people instantly balk at this and point to other tuner's getting alot more power for their price. The devil is in the details though atleast from what I'm reading. I could be completely wrong so please correct me if so. RENNtech states they achieved those numbers @ crank by including a 17% drive-train loss for 4MATIC vehicles.
Just doing some simple math: 416*.17 = 486HP / 460*.17 = 538TQ BEFORE drivetrain loss. So is the tune really producing 486HP & 538TQ without taking drive-train loss into account? This seems more justifiable for their $2300 price tag. I feel its all a marketing scheme and many other tuners may not account for the drive-train loss. Can anyone else please confirm or am I just way out in left field on this?
Just doing some simple math: 416*.17 = 486HP / 460*.17 = 538TQ BEFORE drivetrain loss. So is the tune really producing 486HP & 538TQ without taking drive-train loss into account? This seems more justifiable for their $2300 price tag. I feel its all a marketing scheme and many other tuners may not account for the drive-train loss. Can anyone else please confirm or am I just way out in left field on this?
They are NOT claiming 416 WHP and 538 Wheel torque.
Their claim for PreFL is crank power, hence it just says HP and torque - not at the wheels.
so the wheel figure is approx 17% LESS than above, not greater.
