awiner

Thought this would interest you W211 E55'ers since the 2003 - 2005 CL55 and the E55 share the same engine:

https://mbworld.org/forums/cl55-amg-cl65-amg-cl63-amg-c215-c216/91764-dyno-run.html

BoBcanada

But not the same Hp, E55 has smaller pulley? Isnt it true?

awiner

I believe it is the same size pulley therefore yielding the same boost. The only different equation between vehicles in the length of the exhaust from headers to finishers.

Beowulf

Very impressive, Adam!

BenzoBoi

Very nice...We should gtg again sometime.

BoBcanada

So the exhaust makes 20 hp difference ?

BenzoBoi

Apparently that is what mb is claiming

BoBcanada

I asked few technicians and they told me it's the pulley.

awiner

Well, there is an easy way to put that rumor to bed. Go measure your pulley and I will measure mine.

We will then compare and see if they are the same diameter.

BoBcanada

Ok i'll mesure it today... if it's gonna be a pulley lol only saw it once.

In inches right?

awiner

You can measure it however you wish. I can convert from millimeters to inches, etc... Just make sure to measure the OD (Outside Diameter) across the center.

vraa

Add another one to thinking that all S/C 55's are the same.
The only reason the E55 was rated slower is that the baby W211 shouldn't have beat the R230 on paper.

BoBcanada

Ok here's the question, I opened the hood, where is it? I see one round thing with a belt on it is it the pulley, or is it under the cover?

Is it #1 (sorry didnt have a better pic,you cannot see the round thing there, but it's there!) or # 2 (not sure what is it but i think it has a belt on it too) on my pic? I'm confused!

Vadim @ evosport

Bo: Grab both sides of the front cover and gently rock it back and forth. It will come free. The crankshaft pulley will become visible at the bottom. Measure accross the outside ring.

CynCarvin32

same motor in all the V8k cars -- pulley and all... ecu settings and exh are the only differences.

awiner

The Super Charger pulley is #2 in your picture.

Marcus Frost

Adam,

Thanks for the post.

The A/F ratio in the upper RPM is pitiful, and I've discussed before why AMG does this. It all relates to the achilles heel of our cars - poor heat management.

I have read that the CL/SL/Ss actually have an additional low temp radiator the E55s don't have - and have seen the parts confirming this. In addition, there are a few other things here and there (better intake tube, for instance) I'm sure with all those put together you can see where the 10-20rwhp difference comes from. Not a big difference, but it's there.

Overall, the way I interpret our dyno graphs is I am absolutely astounded at what kind of real hp these motors would have from the factory if they simply dealt with heat better. The heat problem has such a detrimental effect on the engine's performance and we still whip out low 400rwhp figures. If you were able to keep temps at a reasonable level, and leaned out the air fuel ratio... these cars would be putting down nearly 500rwhp+++ from the factory, without question.

The M113 Kompressor motor is an absolutely amazing factory motor, definitely one of my top 10 favorites of all time. Just an amazing engine.

-m