runarpet

Greetings

I was looking at getting some performance headers and I found a set from http://www.evosport.com/product/proddetail.aspx?partnum=EVO.EXH.M03.H03]EVO Sport

what do you people think about it?

and what about Renntech and Kleemann ?


what about http://www.gmbhmotorsports.com/index.cfm?fuseaction=product.display&Product_ID=25 4]Kleemann Sport Catalyst?

c55asleep?

Kleemann

wawy

I've been looking at headers for the C55 also and have tried to research every post here related to them. There are a few C55 owners here that have the Kleemann ones and seem to reasonably happy with them other than the ridiculous price ($3,000+)!! Apparently AMS (Abedin Motorsports) will be offering some in the near future.

As for your interest in the Kleemann Sport Cats, there was a post here not too long ago about a C55 owner that installed those along with the Kleemann headers and seemed to be impressed. I'm not sure if they replace the primary or secondary cats though?

I would love to see before and after dynos of someone that installed just headers (of any kind) on our C55s.............

c55asleep?

If you look in old posts you will find it. Well I have kleemann headers and there headers delete the primary cats or just install there high flow cats. I did the headers and a custom exhaust and I got 16wrhp with this setup.

c55asleep?

You are correct Ams is coming out with some headers and should be good and most important the price is not bad at all. If the headers have the same quality as there crank pulley then its going to be a great product.

wawy

c55asleep,

I would hope that most of your gains were from the headers?

c55asleep?

The 16rwhp consist of the headers and custom exhuast. I really don't think that an x-pipe and high flow cats give much, maybe 2-3 rwhp if that. The rest of the hp was from the headers. I did before and after dyno runs to find out if it really did something or not. Once again I don't know about the custom exhaust being a main concern.

MB_Forever

The fastest C55 in the country is running RennTech's headers and carbon fiber air boxes

c32AMG-DTM

Interesting... do tell what the 1/4 mi time is!

c55asleep?

I think the one he is refering to is on dragtimes which is running 12.2? I ran a 12.4 with the same thing the only difference is I use kleemann headers and I am using a 50 shot of nos. I would love to know the magic behind that car and the C32 that is aslo in dragtimes running 12.3 and claiming he only has 314 rwhp? Btw I dynoed 390rwhp. But hey you never know maybe they strip everything from the car LOL.

dkflipse

+1

runarpet

So has no-one nothing to say about the EVO headers?

wawy

I'm not aware of anyone that has them on their C55 sorry...
Perhaps someone in the CLK forum might be able to provide some info about the Evo V8 headers??

c55asleep?

I think Tump43 somewhere in this forum said he installed evosport. I believe that there the same headers used on the E55. They are also similar to Renntech. There both direct bolt-ons.

MB_Forever

I think that 12.3 belongs to AMG-Jerry. I believe he now has the fastest 1/4 mile C32 doesn't he?

Eurocharged Rick

incorrect, it belongs to fongflex, the fastest time AMG-Jerry has run has been 12.4 IIRC...

mine is a 12.6...it will soon be in the 11's for both of us...

Tump43

I have the evosport headers and have before and after dyno's. I will be able to post them some time later today or tomorrow. Definately gained something from the headers. Uncorrected I'm at 425 hp with all mods, corrected I'm at 395 with all mods, if memory serves. We'll see later. No 1/4 mile times yet, though.

So far, will all mods, no warranty problems and no problems with the car other than with the stock battery and the UD alternator pulley the xenon lights would flicker and shut down at times. The optima battery fixed 99% of that.

c55asleep?

I spoke to Jerry and he also told me he ran a 12.4. I saw it on dragtime the run that fongflex had which was a 12.3 and saw here that he only dynoed 315rwhp and 300tq. I don't want to start no s!!t but i think it is
The only thing i can think is that his car weighs 3000 pounds. There is lots of c32's running here the same mods and almost evey single one is around the same times. The one that makes the least power is the one that runs the fastest.

wawy

Tump43,

If you could post those dynos for the EvoSport headers it would be appreciated....

runarpet

JToups386

Well, unless he defies the laws of physics, there is no way he could run those times w/ that rwhp rating, unless the car is completely stripped down to the frame. It's simple math. It takes X amount of hp to run X ET, at X weight. On the dyno my C55 made 309 rwhp w/ an open element filter, and 306 rwhp w/ the K&N panel filters in place. I assure you mine will not run anywhere near a 12.40 with that power. I'm hoping to get it to the track soon to verify the numbers, but I estimate it's gonna' run low 13's, maybe a high 12.9+ in good air at best.

The exception to this rule would be if he's somehow making those numbers throughout the duration of the run --- as in he's making 300+ from 3000 rpms and carrying it throughout the pull to 6500 rpms, then "yes", he could possibly run those numbers. Remember, it's not peak hp that runs good ET's, but rather it's making high hp "under the umbrella" of the run. One of my old turbo Buicks made only 328 rwhp and weighed 3700lbs w/ me in it, but ran 11.9's at 111, because it made 300+ hp throughout the entire powerband, and had a ton of torque to get it rolling off the line.

Anyway, I'm not trying to call anyone a liar. Currently we don't have access to all the data necessary to dispute those claims, but in the end it's still simple math.
I'd love to see his dyno graphs, and also know the running weight of his car. Then it might make sense.

c55asleep?

J-Toup, i agree with you. The math just does not add up, but hey you never know??? Even that C55 on dragtimes running 12.2 is a little shaddy. Guys, i don't want to come across like a jerk but come on post your real times or explain what you really have. How is it that s/c C55 runs 11.9 and with over 90hp over oem and with some headers and a tune it runs .3 slower. Once again sorry to come across so harsh but darn i hate seeing this s!!t. I know all this is off topic sorry.

Tump43

All --

Here are my dyno's -- hard to read had to use my camera phone; Corrected and Uncorrected. Both dyno's show the best of three different runs. The first (blue) on Oct. 12, 2007, with the evosport UDP pullies and Renntech CF air box, AMS ud crank pulley & green filters; the Second (red) on Nov. 26, 2007, with the addition of the Evosport ceramic coated shorty headers; and the Third (green) on January 17, 2008 with addition of the evotech ECU tuning.

Uncorrected for atmospheric conditions Dyno, the "as she ran" shows: 1) (blue) max rwhp 308.12, max rwtq 322.35; 2) (red) max rwhp 333.38, max rwtq 348.80; and 3) (green) max rwhp 346.54, max rwtq 365.80; and

The Correcected for standardized SAE conditions Dyno shows: 1) (blue) max rwhp 303.58, max rwtq 317.60; 2) (red) max rwhp 317.89, max rwtq 332.59; and 3) (green) max rwhp 324.31, max rwtq 342.33;.

These dyno show a modest increase for each mod in sequence over the other and were each performed on the same dynojet by the same guy, at the same place, albeit on different days.

If one is to assume a 21% drivetrain loss on an unenthusiatic dyno, that translates into 419.31 max uncorrected crank hp, and 442.61 max uncorrected crank tq after all the mods.

Tump43

I will try to get better (legible) pictures of these dynos, but clearly, each mod adds something to the C55. Granted it's a lot of money for little gain but, I did this over time (shopping for bargins); had fun with each individual mod; and did not have to pay a dime for installation (this brings the cost down to something almost reasonable).

The mods I chose were all intended to make the car even more driveable and quicker. These have seemed to do the trick without comprimising the integrity of the original machine, or, in my case, causing any warranty problems whatever with the dealer.

Now I need more money for a set of PSS-9's and a quaife LSD. If anyone has a perfectly serviceable but used set of these items, let me know, I'm very interested.

Regards,

suicidal4life

Did you guys feel the difference that headers made? My E430 is currently at the shop having my Kleemann headers, downpipes, and 200 cell cats installed. I pick it up tomorrow. I don't expect to feel much difference but friends are telling me I will.