freefall

Is this the best way to go and is it really "Plug and Play" as they claim?

_AMG_

Renntech has shown impressive gains with they're tune.
They recently broke the 600+ rwhp mark with 3" downpipe + upgraded intercooler + revised tune. The only downside is Renntech tunes and parts in general are very expensive.

Since your located in SoCal I would highly recommend going with OE Tuning.
They're tunes show a solid 75-80hp gain and 80-90 gain in torque at the wheels.

V-Tech Tuning

Please have a look at our Stage 1 tuning for your ECU. It is plug and play and our turn around time is only one day. We return ship your ECU with UPS next day air early AM service so your down time is minimal.

V-Tech Stage 1 tune for Mercedes-Benz CLS63 (M157)

This tune is the product of extensive dyno and track testing by a German engineer resulting in an incredible 660 crank HP and 730 lb/ft of torque....
$1,998.00

freefall

OE, V-tech, Renntech, Brabus....Love to understand the differences. Do any of the tuners totally replace the old and ship a new ECU?

freefall

Price without a doubt better but the power? Renntech is claiming 669 HP @ 5500 RPM; 734 LB-FT @ 3800 RPM.

freefall

Anybody in Orange County or San Diego?

DucatiGuy

RT's giving you 9 more HP, and 4 more ft lbs of torque, but it doesn't come cheap...

In order to truly see and understand the difference between the various tuners, you need to examine and plot each of their dyno charts. This will allow you to see where and when the additional power is kicking in, and to what extent. Just because one tuner is cranking out more ponies, it doesn't necessarily mean it's better...

As for your ECU question, "Do any of the tuners totally replace the old and ship a new ECU?"... Not that I have ever heard of. ECU's to purchase new are not cheap. Most tuners simply reflash yours and ship it back. If you ship yours out on a Monday, next day air, they'll get it on Tuesday, flash it, and send it back to you next day air, and you'll have it on Wed.

freefall

Very helpful post...appreciate it man. I'm going to be honest in my goals. Their are so many **sholes on the streets in South Orange County that if anyone starts...I would like to finish...even against the Italian horses... I also want to compliment it with a better sounding exhaust system. I basically want that CLS that runs with the GTR in that youtube video...

Where in LI you at? I'm a CA transplant...I grew up on the South Shore....

DucatiGuy

I live right outside of Syosset on the north shore...

justthebest

Subscribing to this thread...

AMGTortoise

RT are doing much faster times than any tune out there & it's untouched till still now. You can see in the video of the new 2012 E63 V8 biturbo at the end of the video the dyno graph they are making more than the claimed power:


I would like to see those other tuners do their own in-house tune; do record better times & mph trap speed with just better tires (w/o weight reduction or using a downhill track), but I've seen none besides RT:

Ready2roll

Don't get caught up in dyno numbers and don't believe dyno numbers from any tuner. Dyno numbers can be manipulated and results will vary from one dyno to another. What you should listen to is real world results from people out there with tunes and more importantly with track numbers. This is the true test

AMGTortoise

If it was manipulated, why are they doing the times. Why not bring a Vtech tune car to run a RT CLS63 in the 1/4 mile, 1/2 mile or standing mile. And, I don't think Vtech sweden does their tune inhouse for the CLS63, since they were looking for a supplier for the same....that's why they are so inexpensive:

Ready2roll

Every time I've seen posted by Renntech is on cars running drag radials. That will make any tune look impressive. How many of us drive our cars on the street with drag radials?

Well open your eyes you are about to see

Here is my car which was tuned by V-Tech with their stage 1 tune. My car is bone stock without anything other than the V-Tech stage 1 tune.
These runs were all made on the stock tires that came on my car. Full weight, full tank of pump gas and I weigh 240 pounds. No downhill track either. Is there really such a thing?

This is no "one run wonder" like you see other tuners post. I'd say my car is quite consistent with 3 consecutive passes in the 11.3's. See the attached pic of the time slips

I have seen NO OTHER tuner post these kind of times on stock tires and I have not seen anyone run these kinds of times with any other tune on a tune only car with the stock tires.

Until someone shows me a 2012 CLS63 running better than 11.3's on the stock tires then I stand by my statement that V-Tech has the best tune for these cars



Here's the 11.346 pass
http://www.youtube.com/watch?v=_owyI...ature=youtu.be

Here's the 11.376 pass
http://www.youtube.com/watch?v=3mtNG...ature=youtu.be

and here's the 11.398 pass
http://www.youtube.com/watch?v=7hAUj...ature=youtu.be


I'd love to run my car on some drag radials one day like Renntech does. We would see some 10.90's for sure and without the need for exhaust mods which Renntech has to run the 10.90

Vic55

Guys lets get real here....dynos are unverified and easily manipulated. Conditions, equipment, etc all play in. The faster car producing less hp on paper is what I would want. And then we have track times in different areas of the US with different drivers too.

Track times do tell it the story in more vivid color but then again we are talking about a very experienced driver in SGC (he drives the Renntech cars). Alot about the quarter mile is the driver too; please dont tell me its all about the tune.

I think all the tunes are relatively the same. They are basically shelf tunes that change tq management and boost right? I speak currently about the m157 63TT engine.

Id bet that none of these tuners have the full 63TT definitions which would allow for a perfect dyno tune.

Ready2roll

Why not bring my car? It's not important to me. I know what my car runs on STREET TIRES!

Why doesn't Renntech bring a car to me with street tires if it's important to them? I am more than happy to run against them any time. My home track is No Problem Raceway here in the hot humid swamps of Louisiana. Bring it

Ready2roll

Sorry I forgot to attach the pic. The time slips are on this post
https://mbworld.org/forums/5012096-post1.html

Ready2roll

Very good post Vic. This backs up what I'm saying!

Don't get caught up in manipulated dyno numbers from any tuner.

Track results tell the real story!

I might add that I'm not some "hot shoe" pro driver like Renntech uses. I'm just an every day guy like most peeps on this forum and running 11.3's on the stock street tires with only a V-tech tune was super easy for me

freefall

So if the results are debatable between these two options doesn't the price difference make V-tech and much better bang for the buck as I AM that regular guy who will be running on stock tires??? Are these the two best mods out there?

What kind of 0 - 60 times are you getting? I've seen Renntech showing 3.2....but I think that is with other mods as well.

Thanks so much guys.

Vic55

If its a shelf tune you want- then get the cheaper one.

EcruisinUSA

And if it's a custom tune you want, send your car to Renntech and they will perfect it.

Ready2roll, you have a great car which is running great times for street tires. But I'm not sure why you confuse street radials, which are for the street, and drag radials, which are for drag racing. Why wouldn't you want the added grip,? They're DOT legal anyways and you can drive to/from the track with them.

Regardless, the CLS63 with Renntech tune has you beat by ~5mph in the same sort of humidity you're familiar with. That says a lot about the HP it is making besides just the peak numbers. Anyone who has spent some time at a drag strip knows that 5mph is nothing to sneeze at.

These threads always seem to end nasty, with each post loaded with bias and opinion. Obviously everyone will recommend to the OP whatever they chose for their own car. I don't think this one has to go there by slinging mud and talking smack about tuners I didn't spend money with. I say let the numbers tell the tale.

vdubpower

it seems like with todays cars, whoever has the best computer nerd who can manipulate the ecu will get the highest numbers


i dont know what the criteria and specifics of todays tunes comprises of, i would like to know before i enter that realm

but bottom line is what gives the best usable power, with out damage to the engine,

Ready2roll

Thank you Ecruisin!
I understand and know what drag radials are and what they do. The point I was making is my car was running 11.3's on the stock tires. In comparison, I have not seen any other 2012 CLS63 from Renntech or any other tuner for that matter run those times with a tune only on the tires the car came off the showroom floor with.

The fastest time I have seen from Renntech "tune only" was 11.21 at 126.30 mph, but this time was achieved with drag radials. Here's a video of that run
Mind you, my car trapped 126.7 mph with a tune only on the stock tires, .5 mph faster than the tune only Renntech car in the video above.
Now, if I had the benefit of having drag radials on my car what ET do you think I could have achieved? With some traction provided by drag radials I could have put my car in the 10.90s or 11.0's with drag radials beating out the Renntech tune only/drag radial car.




NO SIR! 5 mph? The Renntech record is 10.90 at 128.96 mph.
Video here
That is only 2.23 more mph than my tune only car. Yes, 2.23 mph is still significant, but you must remember that the Renntech car also had exhaust mods (cats removed) to yield the higher power numbers. Lets not forget they are also running a 100% locking differential as apposed to the 30% LSD install on my car from the factory.

So basically what I'm saying is take a V-Tech tuned car, with drag radials, with cats removed and with 100% LSD you can expect that Renntech 10.90 record to fall which leads me to my original point to begin with... the V-Tech tune kicks ***

You are right. Bench racing at it's finest
I too believe in letting the numbers tell the tale and believe in comparing apples to apples.

Vic55

Ready2Roll you beat me to it--- his info was not apples to apples... and the fastest renntech run has downpipes too. DP's on a turbo engine make a huge difference.

It seems like there are alot of fans and proponents of their favorite tuner but how many in this thread even have a CLS63TT with a tune?

gripforce-cl65

To OP, I have v-tech stage 1 tune on my car and you are more than welcome to drive my car and feel the differences. I'm betting you will be sold once you drive it. I'm a 'real world result' car guy who doesn't believe in bench racing so the dyno numbers mean nothing to me. Recently I took the car to 1/2 mi airstrip attack event and it surprised many people including myself. A full write up will be followed shortly but to give you a tease, my car pulled about 3 cars on a 670HP Renntech tuned SL65 and it proves how fast this car is now with just the tune
I live in Irvine. PM me for the 'exclusive' v-tech tune test drive. For me, it was the best 2k I ever spent on any mods, period!!!