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I had a closer look at the vivid dyno and it's a bit misleading now I did the comparison. I'll upload a better comparison later.
In regards to the VR tune, take a closer look at the max rpm that the baseline is run to. It seems like they don't run it high enough to reach the peak power for the stock tune (at 6250rpm). If you look at percentage gains on the peak, it can be misleading.
I'm working on extracting the plots for a few of the tunes that are available and scaling them based on their baseline runs.
Here's a comparison plot between a few of the most popular tunes. The numbers are scaled to be comparable to the 503 hp rated by Mercedes for a stock car.
Looks like Weistec is the way to go if you want low end grunt. It's got a lot of torque low down but it could pose an issue to the transmission and/or driveshaft. The Renntech seems to carry the power the best to the redline but is mostly lacking. The Eurocharged tune seems like the best for higher rpm use but since it makes so much power between 4800-6200 rpm, it would probably be faster to shift earlier than usual.
I think I'll go with the Eurocharged tune and maybe think about getting downpipes later on to free up some more power up top. On top of that, I'm scared for my transmission and driveshaft so I'm going to stay away from making too much torque down low.
I didn't mean to insinuate that. I'm just paranoid since my car is still under warranty and I'd like to avoid costly repairs. I'm not sure I've heard of any transmission failures to be honest.
Would not think that there would be at those low end numbers of 350 to 400 HP. My corvette on the dyno, which has a ****ty A8, puts out 525 TQ @3K. The MB tranny is way superior and should have no issues with 350 HP which may be at best 375 - 400 TQ give or take. What breaks trannys and drive shafts is not HP it's torque. I emailed the guys at Vividracing to see if they have any actual dyno graphs that they would like to share. Lets see what they say. In comparison I do like Eurocharged tune looks a lot more linear.
Not to get off topic but when a dealership looks at the ECU, are they able to tell if it has been reflashed? So say if someone has a tune and something happens to the engine and that person flashes the ECU back to stock, the dealership will know?
Not to get off topic but when a dealership looks at the ECU, are they able to tell if it has been reflashed? So say if someone has a tune and something happens to the engine and that person flashes the ECU back to stock, the dealership will know?
Yes and this has been a topic of hot contention. All tunes leave a foot print in the form of a checksum change.
Here's a comparison plot between a few of the most popular tunes. The numbers are scaled to be comparable to the 503 hp rated by Mercedes for a stock car.
Looks like Weistec is the way to go if you want low end grunt. It's got a lot of torque low down but it could pose an issue to the transmission and/or driveshaft. The Renntech seems to carry the power the best to the redline but is mostly lacking. The Eurocharged tune seems like the best for higher rpm use but since it makes so much power between 4800-6200 rpm, it would probably be faster to shift earlier than usual.
I think I'll go with the Eurocharged tune and maybe think about getting downpipes later on to free up some more power up top. On top of that, I'm scared for my transmission and driveshaft so I'm going to stay away from making too much torque down low.
if u get a custom dynotune u csn discuss w ur tuner ur intended use and ur tuner can dial in or dial out low end midrange power
this is why I always go custom tune and not a can tune
I’m on my 4th Amg. All tuned by AMS performance
Not to get off topic but when a dealership looks at the ECU, are they able to tell if it has been reflashed? So say if someone has a tune and something happens to the engine and that person flashes the ECU back to stock, the dealership will know?
When i took my GTS to Eurocharge, they asked if I had bought my car used or new, because they could tell that they ECU had been opened, before even putting it on the machine.
I gave him the PO's name, and, sure enough, Eurocharge had tuned that ECU, before, then de-tuned it before he sold it.
When i took my GTS to Eurocharge, they asked if I had bought my car used or new, because they could tell that they ECU had been opened, before even putting it on the machine.
I gave him the PO's name, and, sure enough, Eurocharge had tuned that ECU, before, then de-tuned it before he sold it.
Wow. Is it a very noticeable difference after the tune?
I say Renntech all the way. If you spend some time on their website you can see they take a lot of effort to find real factory baselines on almost every Benz made.
We all know most of them are massively underrated from the factory, especially the turbo cars, and they don't use that to inflate their claims.
Call me crazy, but a tune on a car with a $50K to $100K motor replacement cost is not where i want to save $1000.
I haven't run one of their tunes on a recent turbo car, but ran their pulley/tunes on 4-5 supercharged cars from the early/mid 2000's and was always impressed
by the dyno numbers and seat of the pants feel and never had any software/mechanical issues.
I'm currently in the process of a lemon buy back of a 2018 E63 Wagon that has only 900 miles, so I am very leery to tune my GTR when I get it.
Imagine if I tuned the wagon, they may have not covered it. It's been in the shop 45 days for defective "cam adjusters".
I would have to guess on an issue like this Mercedes would be more likely to cover any issues with a Renntech tune VS most of the lesser known/newer shops out there.
Yeah, you cannot tune cars that have a lot of technical,mechanical issues. It would be too easy for a manufacturer to deny claim IMO. Seems that new E63S have had their share of issues.
As the GTR and black series go forward with a lot of that same tech, they better work out kinks.
Wow. Is it a very noticeable difference after the tune?
Not as much as I had hoped. According to the before/after dyno runs, the RWHP only went from 450 to 480, while the RWTQ went from 450 to 550.
I'm taking it into Eurocharge Austin, next week, to have them look at it.
I do for Benz based on my past tunes and experience with the owner over 15 years.
I got my car tuned with OE Tuning based on VIC55's recommendation on this thread and I 100% recommend their tune.
Prior to the tune, I was unhappy with the performance from 60-100 mph. It felt like something was holding the car back and it's because something was. Now the beast has been unleashed and I love it more.
The guys are OE Tuning have been tuning cars for a long time (at other companies prior) and know what they're doing. Besides Vic55, I received an unsolicited recommendation from Gary at Garage 54 in Glendale, CA when I was getting my wheel alignment done. Gary knew the head of OE from when he was tuning BMW M's and had actually tuned Gary's own BMW ZM Coupe.
They're based in Santa Ana, CA and it was a quick 2 hour turnaround which is perfect for anyone based in LA or OC.
Ur safe with Renntech but over priced
ur safe with eurocharged - but it’s a can tune
ur safe with OE tuning - but it’s a can tune
ur safe w DME tune
ur safe w weistec-heard they had staff issues tho
ur safe w AMS performance
cars usually pick up 100 wtq and 30-60 whp typically (for a S)
As its been said a custom tune on a dyno is the best, the challenge is finding a shop that has the experience with tuning this engine. A bad custom tune can make your baby go kaboom. The cost of a custom tune is also about the same as a Renntech, 98% of can tunes are the same. Dyno number change because they are dyno numbers, humidity, corrections and calibration play big roles. I want to pull the trigger just on the fence on which one to go with. information in this thread has been great.
BTW I received a reply from Vivid Racing, see their Dyno graph below for their tune.
Take a closer look at the stock run. They don't run it to a very high RPM. The stock tune has peak power at around 6200, it seems like they let off the throttle before then. When you compare peak power from tuned vs stock, its misleading because the stock run peak power is compromised.
Take a closer look at the stock run. They don't run it to a very high RPM. The stock tune has peak power at around 6200, it seems like they let off the throttle before then. When you compare peak power from tuned vs stock, its misleading because the stock run peak power is compromised.
agreed but I dont really care what the stock number is. I'm looking for the number at the wheels that the tune claims to provides.
It's pointless to compare HP numbers from different dynos since they can be calibrated differently. The best way to compare numbers is correct the tuned numbers based on the oem baseline runs.
Ur safe with Renntech but over priced
ur safe with eurocharged - but it’s a can tune
ur safe with OE tuning - but it’s a can tune
ur safe w DME tune
ur safe w weistec-heard they had staff issues tho
ur safe w AMS performance
cars usually pick up 100 wtq and 30-60 whp typically (for a S)
Your summary mirrors what I have found
for me the canned tune will work as I have no local, qualified custom tuner
for those who have done eurocharged or a similar tune on their S....is it worth it?
im willing to risk my warranty as I do not think the tunes push the limits but if I am going to do that and spend the $1500 I would like to know that your seat of the pants dyno feels a sizable improvement with aggressive street driving.
Your summary mirrors what I have found
for me the canned tune will work as I have no local, qualified custom tuner
for those who have done eurocharged or a similar tune on their S....is it worth it?
im willing to risk my warranty as I do not think the tunes push the limits but if I am going to do that and spend the $1500 I would like to know that your seat of the pants dyno feels a sizable improvement with aggressive street driving.
This is my concern as well. I'll void the engine warranty for 120 more HP if it actually is a lot more noticeable or else I'll just ride out the warranty.
08-13-2018, 01:06 PM
