Mag1c Carp3t

You ever figure out your power loss issue?

Celicasaur

Sadly not man, however FWIW here's the latest:

• Gained 40whp with longtubes, so that's the normal gain for that particular mod, although my stock + tune and cams was still lower than what a lot of C63's get with simply tune on the same dyno that I use.
• My torque is notably higher (and comes on strong earlier) than most C63s with headers + tune on the same dyno that I use (450wtq)
• Top end flattens out to an ordinary 460whp - Kleemann tells me that the x-pipe I used is very restrictive (magnaflow tru-flow) and that I should go for true duals or a more 'straighter' x pipe....to be fair, the workshop at the dyno said the same thing to me - however I'd be amazed if it brought a huge gain in power...probably like...10whp at best
• The car gained 55wtq from the headers

My only thinking is that I can either conclude that the cams aren't making the power that Kleemann claim (around 20hp peak and very beefy midrange) - although the midrange is there for now at least....
...or....the W212 driveline losses is the issue. As much as I see C63's over here (with stock 380whp) making 450whp with just a tune (granted, torque is in the high 300's or low 400's), I also see that the E and CLS models put down around 380-400whp stock....so I'm not even sure if there is a problem as such, or if my particular car is at a disadvantage from the get-go by being what it is. Once I've redyno'd with straight pipes, i'll update the thread. I am also in the process of rigging up bigger throttle bodies, so I'll post news on that soon.

Mag1c Carp3t

That must be really frustating. You didn't get a baseline before the cams did you?

If you really wanna open up your exhaust more without having a hack job from an exhaust shop I'd change to MBH LTH and xpipe. Their xpipe is very straight and all 3" from the collectors to the resonators.

I do believe that cams and pnp go hand in hand based off my experience. I could benefit from your cams and you can benefit from my heads.

Celicasaur

Yeah I'd have saved myself a whole load of hassle if I had a baseline. I just assumed that because all the C63's over here were pretty accurate on their baselines vs MB's figures, my car would have near enough 440whp stock and then i'd be looking to see another 20whp on top of that. Clearly that isn't the case with my car.

I've already done the work at home on the driveway - I removed the x pipe and am running straights to the back boxes, but Sweet Jesus, it's unbelievably loud and chuggy now
I thought it was already too loud with the x pipe in, but this is on a whole new level. I'll have to address the sound issue later.

Cams and PnP...I don't agree that they necessarily go hand in hand (in the sense that they must be paired in order to produce power). Cams and upping the compression certainly do though.

I'm not sure if you've got legacy data logs of your car from when it was at 485whp, but perhaps if you compared the maf readings or load at WOT vs your current set up, that might help to point you in the right direction in terms of whether its a case of reduced airflow that is causing the drop in power. That's probably the simplest way, other than pulling the heads and having the flowbenched.

mr747

Bringing a old thread back to life

Mag1c did you get a retune? how did your ported head perform?

Did you get gains?

Mag1c Carp3t

Not yet car is still at the body shop (refer to "metal rear fenders" post for updates). I might just use a standard V7 file from eurocharged. If i end up getting the large TB from the GB BLKRKT is setting up then I'll get a custom tune done but that probably wont tell us about the port n polish gains since we will be tuning for the e85 and large tb at the same time. Unless he's willing to tune as the car is now then re-tune later with the additional mods. Trying not to pay twice for a tune.

hachiroku

what ever happened to your setup @Mag1c Carp3t ?

Edition1c63

Barry knows he can get the power out of it!!!!

BLKROKT

He sold his car

hachiroku

that's a shame. development for the M156 is only going to grow from this day forward.

@Mag1c Carp3t , if you're still on MBWorld would you happen to have flow bench data and flow bench configuration, inches, lift, etc for stock ports. as a bonus if you have them for your ported head as well?

RNS-11Z

if you search under my username I recently posted my flow bench results if that helps