RNS-11Z

so i got the pacemakers ones fitted, http://www.pacemaker.com.au/exhaust_merge.html. only driven around 20kms, things noticed, a lot quieter, car sounds more crisp - doesnt sound like a tractor, seems to rev a little different and more responsive. will have figures hopefully by next wed. (i have my 2nd cats deleted, the x pipe is fitted were they would be located, i also have a tune and bmc filters. its going for a dyno run next week, will post results)

h

C63newdude

^^ Good to know. I am curious to see the gains.

Sincity

The car is quieter with the pipe from Pacemaker even after removing secondary cats? That is interesting.

-michael-

Correct me if I'm wrong, but doesn't the X pipe replace the resonator?
Since the OEM resonator is "sort of" an X pipe doesn't that mean that you will have two of them, maybe that is why it is quite? However, as I already said I might be wrong.

Sincity

Not neccessarily (sp?). For example, GT PRO's X-pipe kit replaces the secondary cats.

RNS-11Z

Alot quieter!!! with the 2nd cats removed the car was very loud, and you could hear it easyly from a distance. Now, it purs like a kitten below 4k rpm, but after that it seems to be as loud as before, how ever a different sound and not so droning. in car noise is reduced alot too. So far im all for it. driving it today, not really given it heaps yet (havent had a chance) but definately starting to notice a difference for the better.

h.

RNS-11Z

well the pacemaker x pipe made me go 2 tenths slower and down 2 mile an hour so out with that and in with the new magnaflow tru x flow style x pipe next week.

h

bushburninc63

change in temp and track conditions? I don't think an x-pipe would negatively or positively affect performance that much. 2 tenths and 2mph?

C63newdude

Are you kidding me?, so you lost performance with these parts?, I am taking notes. Plkease lets us know how the magnaflow works for you.
Also, what device are you using for measuring the speed/time?, are you drag racing it?

RNS-11Z

That is the results so far. This was tested at my local drag strip were i have been going to for years. There could be a few explanations as to why i went slower but i do not know yet, until the next few days.

Brian GT PRO

This is a tough situation, and many people here do not realize that this is why our "Single X" product costs a bit more. Design..Our product is specifically designed for the C63, nothing else, it gives a great boost in power (shown on the dyno, and independent acceleration tests by customers), and gives a great sound to boot!

peet

BTW, that's not an X pipe in the picture but an H pipe. Different flow characteristics.

RNS-11Z

well, that is what most exhaust shops were i am are recommending now. My car is back in the shop for a re-tune as i got all cats removed and fitted a magnaflow x-pipe. im hoping to pick it up wednesday morning, so i should have rwhp figures but wont have 1/4 times for a few weeks atleast

-michael-

So, you are having front cats removed as well? What about those four "lambda sond" sensors? Are you losing them as well? TIA

RNS-11Z

yes that is correct and sensors will be kept. i will try to take photos when i go to pick up the car.

h

AMS Performance

This is not an X-pipe its a crossover pipe (completely different). In order to get any gains it has to be a true X-pipe crossover otherwise you won't really see any legit gains.

Magnaflow makes them and now there are a bunch of polished stainless X-pipes on ebay for $30-60 shipped, hope that helps.

RNS-11Z

green line is new power and torque (xpipe + retune), blue is before x pipe fitted (still tuned), red line stock

Unbreakable1

nice...i like that torque curve!

bozelloy

mate - who did your tune?

RNS-11Z

bps

Maverick1975

Those are awesome numbers mate! You have probably got the bset value tune out there from what i have seen

jjb03

I have this tune also and am very pleased with it.
All you aussie guys have to do is airbag your ecu to james at bps
and you will get it back within a few days. Huge difference.

C63newdude

RSN-111,

I did some calculations and you made like 33-35lb-tq(to the wheels) and no less than 9whp(up to about 13whp) with the all cat removal and x pipe. I am impressed with the torque. This tells me that this engine can squeeze tons of power and torque just on exhaust mods alone(headers, cat removal, bigger diameter piping, cat backs)

RNS-11Z

thanks maverick, i stuck with the factory 2.5in diameter aswell. overall i think the tune, x pipe and removal of front cats have all played a role in the significant torque gain i have down low and mid range. The car is alot smoother to drive now and revs alot cleaner and quicker too. You can definately notice the difference.

This will all stay until i get my headers and new exhaust in a few months.

h.

shardul

iTrader: (1)

A x pipe will definitely add some low end torque