MPE Perforated Tip-Swap?

slipaway37 · 11-20-2013, 12:21 PM

Need opions:
I recently installed the Gintani catless x-pipe coupled with my MPE. Rather than revert back to a stock exhaust to curb the rasp I am thinking that the majority of the rasp emits from the Iconel perforated tips. Theory tells me to swap these perforated tips with perhaps the BMW black chrome tips which are non-perforated to help reduce the rasp. Of course my testing this theory will run approx $500 and also alter the MPE affecting a potential re-sale. I know the internals of both exhausts are different, but I seriously believe that changing the perforated MPE tips will help.
Any thoughts? Thanks guys!

gatorfast · 11-20-2013, 12:22 PM

I doubt changing the tips would change the sound at all.

slipaway37 · 11-20-2013, 04:21 PM

Quote:

Originally Posted by gatorfast

I doubt changing the tips would change the sound at all.

Yeah, my shop guy said the same thing.
I'm gonna swap with the stock exhaust and give that a whirl.

Denk · 11-20-2013, 04:32 PM

The stock exhaust with a catless xpipe has crazy rasp!

sylonien · 11-20-2013, 05:00 PM

The MPE on its own is quite raspy already.
So not surprised that you are getting rasp sound from a cat less xpipe

dparm · 11-20-2013, 05:07 PM

Quote:

Originally Posted by gatorfast

I doubt changing the tips would change the sound at all.

Correct.

Install properly-sized resonators.

slipaway37 · 11-20-2013, 08:16 PM

Quote:

Originally Posted by Denk

The stock exhaust with a catless xpipe has crazy rasp!

Yeah, but not nearly as bad as what I've got going on.

slipaway37 · 11-20-2013, 08:17 PM

Quote:

Originally Posted by sylonien

The MPE on its own is quite raspy already.
So not surprised that you are getting rasp sound from a cat less xpipe

Huh? I had absolutely ZERO rasp/drone with the MPE and OEM x-pipe. That sound was most awesome!

edwinm3 · 11-20-2013, 08:20 PM

MPE with stock X pipe sounds very good but with a catless X pipe sounds horrible.

sylonien · 11-20-2013, 08:22 PM

Quote:

Originally Posted by slipaway37

Huh? I had absolutely ZERO rasp/drone with the MPE and OEM x-pipe. That sound was most awesome!

The MPE on its own is quite (subjective) raspy already. Didn't say it was droney.
So not surprised that you are getting rasp sound from a cat-less pipe (again, didn't say it was getting rasp from stock OEM x-pipe, but from a cat less one

meko · 11-21-2013, 03:36 PM

When you guys are talking about catless x-pipes are you referring to primary and secondary catless or just primary?

slipaway37 · 11-21-2013, 03:42 PM

Quote:

Originally Posted by meko

When you guys are talking about catless x-pipes are you referring to primary and secondary catless or just primary?

primary & secondary & OEM resonators: a straight x-pipe without any HFC's.

11-20-2013, 12:21 PM	#1
slipaway37 First Lieutenant 83 Rep 333 Posts Drives: '13 ZCP/E92/M3 Join Date: Mar 2010 Location: California iTrader: (0)	MPE Perforated Tip-Swap? Need opions: I recently installed the Gintani catless x-pipe coupled with my MPE. Rather than revert back to a stock exhaust to curb the rasp I am thinking that the majority of the rasp emits from the Iconel perforated tips. Theory tells me to swap these perforated tips with perhaps the BMW black chrome tips which are non-perforated to help reduce the rasp. Of course my testing this theory will run approx $500 and also alter the MPE affecting a potential re-sale. I know the internals of both exhausts are different, but I seriously believe that changing the perforated MPE tips will help. Any thoughts? Thanks guys! __________________ '13 Frozen Grey, ZCP/E92 M3. Expel Stealth PPF; BPM Stage II; Macht Schnell Stage II intake & pulleys; Brembo 380 BBK; Gintani x-pipe w/4 resonators; Akrapovic slip-on; RD springs. '16 Porsche Cayman GT4: No MODS required, lol.
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11-20-2013, 12:22 PM	#2
gatorfast Major General 4995 Rep 6,862 Posts Drives: 718 Cayman Join Date: Jan 2008 Location: SoFla iTrader: (4)	I doubt changing the tips would change the sound at all.
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11-20-2013, 04:32 PM	#4
Denk Brigadier General 1006 Rep 3,341 Posts Drives: 2021 X5M Join Date: May 2011 Location: PNW iTrader: (2)	The stock exhaust with a catless xpipe has crazy rasp!
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11-20-2013, 05:00 PM	#5
sylonien Major 114 Rep 1,326 Posts Drives: M3 Join Date: Apr 2012 Location: UK iTrader: (0)	The MPE on its own is quite raspy already. So not surprised that you are getting rasp sound from a cat less xpipe __________________ Please consider checking out my YouTube Channel for car and tech videos.
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11-20-2013, 08:20 PM	#9
edwinm3 Brigadier General 980 Rep 4,001 Posts Drives: F82 Join Date: Nov 2011 Location: Broward iTrader: (32)	MPE with stock X pipe sounds very good but with a catless X pipe sounds horrible. __________________ Grigio Telesto M4, 6MT. Coyote 5.0 F-150 991 GT3
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11-21-2013, 03:36 PM	#11
meko First Lieutenant 179 Rep 387 Posts Drives: E92 M3 - 535i Sport Join Date: Oct 2010 Location: New Jersey iTrader: (3)	When you guys are talking about catless x-pipes are you referring to primary and secondary catless or just primary? __________________
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