AMGJAY

Has anyone raced these two cars stock? I was curious which one would be faster from 30-90 and 60-130.
Obviously a tuned Biturbo is faster, but I am just looking for stock comparison.

I have a Eurocharged Tune, ROW Intake, and Resonator delete. I'm convinced that I can take a stock biturbo.

Would like to hear some insight.

marcolarco52

With a tune I checked renntech and intake you should be putting 550 or so at the crank...where as a stock biturbo m157 is showing dynos between 510 to 540 all wheel...more like 630-670 crank hp.

AMGJAY

Think you got the M157 numbers backwards. Stock is around 530 I believe and S model has 577.

Celicasaur

I think stock for stock, assuming they don't start the pull at a point in the rpm band where the 6.2 will be below 4000rpm, it will be fairly close whichever way you look at it. From a dig, both with good tyres and conditions....could well be the same outcome.

As a guess, I'll give the edge to a 5.5TT and that's because it makes the same power as a lightly tuned 6.2, but with more torque. Your tuned car....who knows. Does the TT model have slightly longer gearing, being boosted? If so, your tuned car might have the edge.

AMGJAY

See, I am not sure about gearing. I guess the only way to figure it out is to across one and do an old fashioned 3 honk.

gaspam

it wont be close.... I've had both and both started stock and both ended up tuned...

when they were both stock, the 6.2 felt slow (i came from modded E55 to the 6.2), whereas the 5.5TT (in S-trim) felt fast.... actually fastest stock car i ever had

modded... they 6.2 doesnt stand a chance until you slap a stage 2 weistec s/c on it

sdg1871

+1

The M157 will eat the NA 6.2 alive.

Davidkuo0330

There are different versions of the E63 Biturbos to compares to the NA 6.3.

Ie. The preface has the option P30 or performance package E63 and the facelift has the S model.

Honestly, I don't think the NA can keep up with the above mentioned options.

PeterUbers

A true challenge would be rwd 5.5tt vs rwd 6.3

From 60mph to 130+ the awd limits the 2014+ USA e63

mellowyellow

The Eurocharged tune likely didn't do much for you, the M156 in the W212 configuration was already putting out higher HP numbers than most M156 configs.

One thing I will say, it's nice to have both engines.

baldmike73

the 63 NA is limited to about 550 or so with tune + headers + row
i have a set of shorties in a box for a year now and keep contemplating should i install and tune or just wait it out and jump to bi-turbo in the next year.

but do love the linear feeling power in the 63, but miss the grunt of the 55 - so figure the new bi-turbo is a blend of the 2

AMGJAY

What kind of shorties do you have? I may be interested in them. Was looking into headers but I need to speak to my SA and see if they would void my warranty. That's my biggest concern.

I definitely feel the 63 is a better sounding motor than the 55. More raw power. Better grunt. And growls way louder through WOT.

faz492

I agree about the better sounding raw power and grunt,
I really want the m157 but i wouldn't trade the m156 for it..
The m156 motor is iconic in my opinion.

MTV10

The M157 car will pull the M156 car every time.

otakki

Would love to keep the M156 long term, but with all the problems mentioned by those on the W204 C63 forum, can't really do that after the warranty is up. Really hope that AMG would have gone in to correct all those little problems to make the M156 an otherwise bullet-proof unit.

AMGJAY

What major issue does M156 have besides headbolts? I feel that once this issue is fixed through the dealer the motor should be fine. Correct me if I'm wrong.

Celicasaur

Nearly all of the cylinder head it's really disappointing.

Headbolts
Camshaft lobe wear
Tappets
And sometimes the VVT unit on the camshafts

otakki

Yes, really disappointing with all those parts as mentioned aboe by Celicasaur. Those problems have been shown to continue occurring even with newer built M156's in post 2011 C63's that had the heads taken off by forum members. You will find some of those threads with pictures on the C63 forum. Maybe the only way to keep such an engine around for long term is to go for the M159 in the SLS. Here is a link to one of the many sites on the lawsuit that had already closed, but it will give you an idea of what you are dealing with:
http://www.jacobregarlaw.com/Blog/20...or-the-M1.aspx

PeterUbers

Daaamn...