Capn

I've got a resonator delete (sounds great and no droning at all) but I'm sure there were no power gains but I'm now curious if any power loss was caused?

Resonator deletes usually reduces backpressure but I think that only works in favor of a forced induced motor.

Any before/after dynos?

91RS

It won't change anything, the stock C55 exhaust is very restrictive because of the primary cats. That's why Kleemann or MBH headers give such a great gain. From what I've seen C55s dyno 275-300 to the wheels, most are closer to 275 but there are a few factory freaks.

Capn

How much of a gain are we talking about with Kleemann/MBH headers? I know with the Renntech headers they state 15+ hp and 20+ torque at the crank.

kent426

That is not their only choke point. The single Y at the differential has to be worse. All pipe sizing specs relate that to support 400 hp, you need a single 4" exhaust or dual 2 1/4" pipes.

91RS

Renntech headers are only shorties if I remember correctly. Kleemann headers are supposed to be good for 50hp and I would guess the MBH headers a little more.

Capn

Whaaaat??? I had no idea long tube headera had this much gains on the C55.

When you say 50hp increase do you mean along with ECU and airbox right?

jturkel

MBH headers give you a TON of power.

message member named "MBH motorsports" (his actual name is Mike and used to have a highly modified supercharged C55) and ask him for specs/pricing. tell him i sent you

wawy

When I removed my resonator on my C55 my throttle response was not as sharp as before. Did I lose any power? I'm not sure. I do have a dyno (Mustang) of my C55 after doing this. Unfortunatly, no before and after of the resonator only. Here you go: https://mbworld.org/forums/c32-amg-c...dent-dyno.html

MIKESV8

305HP,316TQ. with K&N drop in fliters+resonator delete
https://mbworld.org/forums/c32-amg-c...u-flash-7.html

Capn

To put things into perspective:
Stock C55 with 20% drivetrain loss is 285 rwhp and 300 rwtp

So if I am getting this right, with your resonator delete and K&N filter you made 305 rwhp and 316 rwtq.

After adding the ECU you made an additional 15 rwhp and 30 rwtq increase without headers? So that would make flywheel horsepower about 420 and torque at 440?

What dyno did you run on?

MIKESV8

i did beat a stock e92 M3 on some freeway pulls after that. so the numbers would seem correct.
not sure what dyno it was, check my sig. for the dyno runs. i did the same dyno on my E63. it was at dittos motors in daly city, CA.

Capn

Do you know if the M3 was a 6 speed or the DCT tranny? Those things are supposed to be high 12s cars so if you beat it then you must be putting some serious power down to the wheels.

And the part that still has me puzzled is you had great gains without headers

MIKESV8

It was a 6spd. Manual with 50k miles on it. An 08'. I was in the market for headers but they were way too expensive.

Capn

All the other tuners didn't bother creating an exhaust for the C55 because gains were minimal. That's why you only see intakes/ECUs/headers for this car.

91RS

The gains are huge with a complete exhaust. On my supercharged car, once I put on the Kleemann headers, high flow cats, and a full custom 2.5" exhaust back to the mufflers I gain 0.5 in the 1/4 mile.

Capn

You might have a point because Dre's setup without any cats, Kleemann headers to 2.5" stainless duals w/ x-pipe, and stock AMG mufflers netted him 377rwhp on a Dynojet. However since he is N/A he only probably gained 15-20rwhp and the cost must have been extraordinary for custom exhaust system.

Nachtsturm

Also keep in mind dre has a custom dyno tune by Jerry.

91RS

Dre bought Alumar's used exhaust from his car when he went long tubes. I wanted it bad myself but I missed out, he got a great deal. I've got a good bit of cash into mine, but it's about the best it can be. There's about 30 hours of fab into it.

dre5373

Close, it was AMGSC...it's been a while, I had to think about it myself


IMHO, the reason no full exhausts were developed was becaut the C55 has a production of only 1750 vehicles to the North American market. Assuming that what I've read about the US getting 40% of AMG production, that would mean a whopping 4375 worldwide. Given that most owners will not mod their cars it would be stupid for a company to invest much in product development. The mods that are available were developed for the engine, not the chassis.

My custom exhaust was a little over $900 iirc.

91RS

Eh, I got it mixed up then. I couldn't remember.

The C was always the ******* child anyway. It never took off until the W204. That's why the CLK got all the cool factory options that the C could have easily had since it's the same car with two more doors. Plus, all the companies making performance parts for Benz focused on the E since it left the factory with a supercharger so it was easier to make faster.

amgen

Just for the record,

4.600 C55´s were made in total between late 04 and early 07.
1.750 were shipped to North America, all sedans.
Maybe 1.750 were wagons...

PTE

Hello All:
I believe that there is not much to gain in a Horse power increase with a Res delete. Just maybe a noise incrase. The real Hing pin is the exhaust manifolds . Stock manifold outlet is a little over 1.5 ". The Klee Headers are 2.5 ". Somewhere Here are some answers ? https://mbworld.org/forums/clk55-amg...er-review.html. I'll find the dyno sheets & Pic
Cheers
_PTEngineering

amgen

There´s no hp-gain with a resonator delete!

The resonator takes away some drone and is a big straight
muffler.




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Capn

[QUOTE=amgen;5460850]There´s no hp-gain with a resonator delete!

The resonator takes away some drone and is a big straight
muffler./QUOTE]

Funny enough I hear zero drone with the resonator delete.

91RS

I have no drone with my exhaust now with the headers and 100-cell high flows. I had no drone even right after I put the headers on with no cats. Drone is all in the muffler(s).