AlexZTuned

Renntech testing their stage 1 M177 software just put down 602 HP and 595 ft-lb torque (609.7 ps / 806nm)

AlexZTuned

Dyno added of stock vs Renntech Stage 1:

Iceman II

This is awesome stuff.....! Subscribed for sure.....!

Help me understand -- stock S model peaks at just below 500hp? Did I miss something here?

edit: Nevermind....figured it out.

JPMBenz

So crazy! LOL


I think the License Plate is comical also! HAHA

AV1

And so it begins


Some of us did say long ago that those sorts of power levels would be easily achieved with just a simple tune alone.


Long term down the track serious tuning is going to net some whopping results, an AWD variant in future would be welcomed

AMG Boost

Ya that must be at the crank, not at the wheels. Still very very impressive. 100hp gain from a tune. Jesus...

Iceman II

Its at the crank. Yes, good numbers.

AlexZTuned

Haha yep, back in October

"Tuners are probably already salivating over 100+hp ECU-only flashes"

aznevoviii

So c63 tuned vs c63s tuned,
Whats the difference?

JPMBenz

What did this car dyno to the wheels stock? 503??

camnet

I'm confused. Isn't the point of the dyno to measure the HP/Torque at the rear wheels which can then be extrapolated with driveline loss to arrive at a approximate crank HP ((I know it is when I have my mustang dyno'd)?

Arcoril

This is from an engine dyno. It's much more accurate than having to estimate the drivetrain losses when you're measuring at the wheels.

camnet

thanks. That makes sense. Where's the sheet from the chassis dyno in the OP's video?

PetroC63

Usually that's the case.

This particular car(non S model) made 433 rwhp before tuning and 534 rwhp after tuning. Which means these cars are underrated from the factory.

camnet

Thank you much. Can't wait to get my hands on my car!

sinurgy

I don't understand, the video shows the car rolling on drums, how is that not measuring rwhp? I mean based on the numbers (600hp) I don't see how the hell it's not crank but my understanding is that getting true crank numbers is extremely expensive because you'd need to remove the engine. What am I missing?

Iceman II

The video says it is a "S" model. The badge has been removed but the video title says C63 S.

Iceman II

Are you saying this graph is incorrectly labeled and should be WHP versus BHP? That would make more sense (hopeful and wishing) as it would then show the engine is underrated. At this point, the current dyno just confirms that MB is very accurate with their rating of the engine. The black line (stock) shows its exactly as advertise.

Iceman II

CORRECTION: Getting word that this is the non-S model. If confirmed, that surely changes how I view the graph. That means the C63 non-S model is pulling over 500 stock and a simple ECU tune places this near 600+.

sinurgy

No I'm saying that none of this makes sense and I'm hoping someone who knows more than me about this stuff can shed some light on it.

Typically if you put a car on a dyno machine, which this seems to be since the car is sitting on rollers, the output that is measured is indeed rwhp but no way in hell this thing is putting down 600rwhp with just a tune (unless they just cranked up the PSI of the turbos, engine be damned)! So that leaves me with questions...what exactly is happening here?

My best guess is this...they know the car is supposed have X amount of HP from the factory so they run it on the dyno before any mods are done to get a corresponding baseline RWHP. Then they use those two numbers (factory reported HP and their baseline RWHP) to calculate the drivetrain loss. Once they have the drivetrain loss figure, they can guesstimate crank HP on any dyno run they do. Now why you'd do this instead of just using RWHP is beyond me but that's my best guess as to what they're doing.

EkS

This is from their YouTube channel.

sinurgy

Ok so it would seem my guess was right, they took a baseline, compared it to factory and calculated drivetrain loss. Now they simply apply that calculated drivetrain loss figure to subsequent dyno runs in order to come up with a guesstimated crank HP. Nothing wrong with that at all, it just confusing there for a bit.

So next discussion...what are they doing? Are they simply upping the boost?

jamesyot

damn I love my CLA buttttt

AV1

AFAIK the M177 engine in both the S and non S is the same hardware spec running different software spec tunes.


If that is the case then you'll be able to get the same output for either one with a software change.

amanuuh

damn the fact that this is only the C63 is getting me excited lol