xtyper

As some of you know, last week I sent my ECU out to Renntech to have it tuned. Everything went very smoothly, and I received it back two days later as planned, along with a couple of BMC Air Filters. Like a kid on Christmas morning, I opened the box and installed the goodies right away. Then I took the car for a spin.

Now, mind you, I've read all the reviews and power results on these M157 tunes, but never in my wildest dreams did I imagine it would have the effect it did. The car felt strong before, but now it feels AMAZING! Stock-like driveability at partial throttle, but at WOT, all hell breaks loose. Mashing the throttle on the freeway at speed even spins the tires loose. This thing is a monster!

To make sure the results I felt on the street could be verified on the dyno, I took the car down to MD Automotive in Westminster to check the power output. Keep in mind this is the same shop used in all the Edmunds.com dyno reviews. It's a typical, run-of-the-mill Dynojet 248, and Mark the owner is a really nice guy.

Car: 2012 E63 AMG Non-PP
Modifications: BMC Air Filters, Renntech Tune
Fuel: 95 octane mix via blend of Chevron 91 and VP Racing 100
Ambient Conditions: 75 deg F, 28.79 Baro, 59% Humidity
Dyno Type: Dynojet 248
Peak Results (4th gear): 607whp & 710wtq SAE Corrected!!!

Attached below is a picture of the dyno graph printout. Besides amazing peak power, note how smooth the curves are, and how safe the AFR looks.

Needless the say, I couldn't be happier with these results. Much thanks to George and team at Renntech for the great customer service and a top-notch product.

Next up...the Airstrip Attack event hosted by Shift-S3ctor Nov 10-11. I think this car is really going to surprise some people there. Can't wait!

Mjthind

That is frickin crazy! And that is with out upgraded turbos right? I have one question though, that tune is basically pushing the engine and the turbos to their limits, so wouldn't that create a reliability issue?

xtyper

Thanks! Renntech has assured me there should be no reliability issues, and that peak boost is no higher than the stock Performance Package level of 18.8psi.

Mjthind

Well then drive her as much as you can! Have fun bro!

vdubpower

nice numbers

as u are a local, did u ever drive the weistec car, they have simliar numbers, and i believe on regular gas...

was your car PP to start with ?

xtyper

Thanks. No, never got a chance to drive the Weistec car, but I'm sure it's equally impressive. And no, my car did not have the PP.

Karl901

The tune does not matter if it is a PP, same result.

Now it is time for the 305x 20s, and resonator delete!

Vic55

Most tuners are all in the same ballpark--- different dynos show different numbers of course. Im sure race gas (mix) helped a bit too. Nice gains- would love to see you run another tuned M157 at the Sector.

xtyper

Thanks Vic.

There are a couple of other tuned M157's attending the Airstrip Attack, and I intend to run them both. One is a 12 CLS63 running at least the Weistec tune, but not sure about additional mods. And the other is Jason who you know with his Renntech tuned 12 CLS63 and supporting mods. He should spank me, but the E63's slight weight advantage may help a bit.

Vic55

Jasons Renntech only tune (prior to upgrade or redo) was about 30 hp short of my tune on the same dyno... I do know he redid it and then do some other mods so if he doesnt beat you he will be very very very sad indeed

vdubpower

Don't come home without vids.

xtyper

Oh, don't you worry. Pretty much everyone is bringing GoPros to the event, including myself. Should make for some amazing footage.

I'm also really hoping to get a crack at Josh's Weistec supercharged C63, as the question of how our cars tuned stack up to that has been questioned a lot.

cayenne-tt

Can the tranny and drivetrain handle that much of a power increase?

Also can the dealer detect it when you take your car in for service? Those are monstrous numbers!

NickE63

probably a matter of time!

Verb04

Would would stay far away from the BMC Air Filters. Those damn filters ended up being one of the biggest nightmares I have ever been through!

https://mbworld.org/forums/w212-amg/...ir-filter.html

BenzoBoi

Some stout numbers! Can't wait to see/hear how you do!

Incon306

Excellent results!

Out of curiosity did RennTech create your tune knowing that you would be running 95 octane or did they assume that you would be running the crappy 91 octane we're typically limited to here in CA.

Incon306

Also, I just noticed on your dyno graph that the 3 runs shown are runs 3, 20, and 21. Did you really make 21+ dyno pulls all the same day with the same mods?

xtyper

I made no special octane ask, so as far as I know they gave me their typical 93 octane shelf tune. That tune will dial back timing appropriately when I choose to run straight 91 octane, and dial it up when I throw in some race gas. Perfect compromise to me.

xtyper

Ha, I knew somebody was going to ask that. I actually only made a total of 4 runs that day on the dyno. Midway through the runs, I accidentally messed with the save directory while viewing my charts, and it started saving to someone else's directory who had left off at run 19.

xtyper

I read that, but am convinced you were the unfortunate victim of a bad batch of filters. Regardless, I check my filters religiously, so odds are I would catch any problems before they became damaging.

Sorry again for your horrible experience and thanks for alerting the forum. I will definitely be on the lookout.

ShaneN.

How does it feel compared to your 474 rwhp c63 you had? I guess they're not even all that much heavier are they, and it's got a considerable amount of more power. Would it walk your old car pretty bad?

xtyper

Definitely would walk my old c63. I'm taking this car to Famoso private rental next week and have no doubt it will easily beat the c63's best time of 11.5 at 122.

Just wait until you see footage of how it did at the Airstrip Attack event, especially my run against a new 13 M5.

vdubpower

what were the numbers pre tune

Vic55

We all know a tuned M157 will walk a stock M5---- no brainer...