*** VR550 for M113 55 Kompressor ***
 

Although there have been dynoes done on 175 mm pulley before, we would like to start from scratch and build a car with our parts, one part at a time.

Our first performance stage will be called VR550. 550 represents HP level.

We have discussed AMGs HP rating of M113 Kompressor engine in the past. In E and CLS it is rated at 469HP, in CL, SL, S and G it is rated at 493HP. In reality it makes the same power in all chassis and it is very close to 500HP. (One exception is 2003 and 2007/2008 SL55s, those had 80 mm TBs from the factory and were rated at 510HP).

On average, 55s make between 410-430 RWHP. If we use 420 as an average number, and 16%-17% drivetrain loss - 420/0.84 = 500HP.

Our goal is to add another 50HP (45RWHP) through our crank pulley kit and custom software tune. So, we have selected an 2006 E55 with 18K miles for testing and development purposes.

As you can see on the graph below, this car is a perfectly average E55 with 420RWHP.


Tomorrow, we are going to install our pulley kit and see what kind of power it adds, than we are going to tune it with Powerchip assistance and we should be at our goal of 465 RWHP.

Stay Tuned! :D

You guys are doing great! Seems you are filling the voids all the other tuners couldn't. Congrats.

As far as your sig, you've got sexier pics to choose from. Long tubes...cams...etc.:naughty:

And it has begun....:bow:

FWIW
One other bit of information to address regarding the base dyno would be if the car underwent the air pump flash.

Seems that could be 30 to 40 hp. needed just to get back to stock (420 RWHP).

Thanks!

I just threw the sig together. Over the weekend I will have more time to make it prittier..............:D

Car does have latest flash from the dealer. We did run into it's limitations on another car. Powerchip does have a solution that we are going to try tomorrow.

Can't wait to see the results:y

both you and victor are free to use the images of my car/headers if you want.

very nice Vadim.

hopefully.. Stage 1 VRP with Intercooler set up will be tested before you add the headers and TB's.

stage 1 with intercooler for me is the perfect set up, without spendin too much money on the other goodies.

:popcorn:

That car runs rich up top!

That isn't just "that" car, its OEM E55s. That is why I have always hesitated on ECU mapping. It is really an intricate balance that MB tries to do with the A/F ratios. Adding a pulley should (in theory) raise the A/F back up some, but my guess is that the dyno with just pulley will show similar, IF NOT LOWER, A/F ratios at the top end. That is because the ECU steps in at some point and dumps enough fuel to keep the area safe. This is exactly why they say an empty gas tank is the most dangerous, since it has the most vapor gases (which is what blow). So, to get power it seams that you have to intervien and I don't know where the safety factor goes then. It is definitely all too comlicated for me, but it is fun to see.

Is it VR550 or VRP550? :naughty:

It is VR550 :naughty:

UPDATE:

We are currently datalogging the car and working on TQ limiting maps.

E55 is 2006 and as soon at sees more than 12.5 psi it pulls timing, richens fuel mixture below 10:1 and opens bypass valve. Powerchip is returning from vacation next week and we will continue tuning.

Stay Tuned!

WoooooHooooo!! The car is a monster!! Haha!! Jeremy is gonna need to tame it a bit. Top end is just sick and the upshift is sharp!! Did he raise the RPMs?

We gotta get it next to Vic's old 55 and see how close they are... its a good benchmark.. Then we can add more JUICE... hehehehehe...

BTW, did you try the M6 yet? :D

Hey Victor, is this some new version of the VR550 that you are werkin on or is it the same one you and Vadim are selling??? TIA

TB and Headers and I'll walk that car :)

HAHA. That should be a good race. Im ready whenever :zoom:

Really looking forward to the results on the completed package(s). Great work so far guys, keep the info coming!

Is the 'panic mode' of seeing too much boost and pulling timing/dumping fuel something that was already known (wouldn't the other tuners have hit this already) or was this a surprise on the '06?

Ready to foolishly spend some (arguably according to my wife) disposable income :rolf: ...

They have hit it, but tried to ignore it. It came up about a year ago with a member's car trying to go huge HP. Also, I need to note that it only shows its face when you do mods. OEM, it is fine since it never hits that much boost.

I've argued this point for well over a year now, because I had information before it even came out. Do searches and you'll see that I have put up a challenge to any tuner to "crack" the code and I would buy it. The thing is, it isn't just for '06 cars built in '06; it is for any E55 that has a current dealer flash.
Lucky for me, VRP was working with PC on some tunes and I happenned to bring up my concerns again. Thanks to VRUS for stepping up and acknowledging that he had heard of the same thing and so PC took it as a challenge. With Vadim gathering data and Jeremy tuning, things are finally getting somewhere. They definitely have found the right levers to pull, but just need to figure out the setings. As we've all known, tuning takes time. It takes Dyno data and real life data and that is exactly what VRP / PC are doing. I LOVE IT!!

By the way, I heard yesterday that the 80mm TB stops the issue? Maybe less air velocity.

I thought, Oliver @ Evotech, who customizes ECU tuning has/had it all figured out. I had my ECU shipped to Adam and Oliver did his thing. Perhaps Adam or anyone else could chime in................

I think it is particularly interesting that most E55s on the road probably have the upgrade software flash, which means that many people with mods are really getting the extra hp they think they are. Believe me, with an upgraded pulley, you can actually make less hp than stock! I am surprised more people don't dyno their cars after mods.

Every tuner claims to have it "worked" out, but also deny the difference in the same sentence. I have asked for Dyno data since day one and NOBODY has ever shown it, including EVOTech. I already know that RennTech does not have it resolved.
In the end, a VRP pulley with PC tune vs EVOTech tune will be nice to see. It isn't that I don't think that Adam / Oliver can do it (since they are actually the best pair to attempt it), I just do not believe that they have dedicated the resources to it as VRP / PC have. That is why I am so happy with VRP. They don't just say, "you want stage 1". They listen to what I want and also go about it in a very systematic way. It just makes you feel comfy to leave your car in their hands. Vadim still thinks my tune has a long way to go. I think it is pretty fast as is and all of you know how picky I am :y

VERY VERY true. That is VRP's exact point. That is also why they do not only rely on dyno data. All a larger pulley does is increase boost. From there, all the various parameters are effected and many are pulled out of their sweet spots. Tuning entails finding each and every one of those parameters and maximizing the sweet spot. True tunes are an absolutely tedious task.