Rasp Galore?

mfanatic325 · 03-23-2011, 01:29 AM

EDIT: HD Recordings uploaded in post #16. Enjoy in HD mode!

Why does the S54 motor rasp so much?! I just swapped out my stock section1 with a SuperSprint uncatted S-Pipe and omfg, the rasp is killing me

I might hafta put some kind of resonator into the S-Pipe to reduce all the metallic rasp

BTW, my current exhaust mods are (in order): JVT headers, SS section1, stock section2, SS race mufflers.

I ordered my SS section2 (X-Pipe) a couple weeks ago and it's supposedly coming in from Italy and I should receive it in a week or so. But I know for a fact that it will add even more rasp

The power from section1 swap is absolutely amazing though. Maybe it's because I have the headers and the ECU tune, but holy crap it surprised me when I first got on the throttle to test it out

I'm just really not a big fan of rasp though...
What to do, what to do...

BlackMoupe · 03-23-2011, 01:33 AM

m3forum.net has many solutions. Rasp-B-Gone

mfanatic325 · 03-23-2011, 01:36 AM

I'll look into that, thanks!

BlackMoupe · 03-23-2011, 01:39 AM

http://www.m3forum.net/m3forum/showt...highlight=Rasp

mfanatic325 · 03-23-2011, 01:43 AM

LMFAO, I was just going to do a P.S. : "for future reference" and provide that link

Thanks!

onebluemcm · 03-23-2011, 06:25 AM

You must resonate.

It's not a big deal other than having to cut the new SS section 1. Resonators won't hurt exhaust gas flow like cats. I'd be surprised if any other x-pipe made it worse - removing the cats is the rasp creator.

Diokaef · 03-23-2011, 12:24 PM

The AR20 or AR25 will be a pain to try to instal on your section 1 SS, you need a 9-10" resonator with a 4" body to use the SS sec 1. I tried that, trust me.

mfanatic325 · 03-23-2011, 12:34 PM

Quote:

Originally Posted by Diokaef

The AR20 or AR25 will be a pain to try to instal on your section 1 SS, you need a 9-10" resonator with a 4" body to use the SS sec 1. I tried that, trust me.

Damn...anywhere I can find such resonators then for purchase? I wanna keep my system all SuperSprint. My headers are reps, but at least reps of SS

edit: Will the magnaflow resonator work? http://www.custom-performance.net/pr...3&idproduct=25

Diokaef · 03-23-2011, 02:47 PM

Nope, But I may be able to get you one from the manufactory that I'm working with but that will take me at list one or two weeks, its 9" long I don't know how much it cost but I can check if that helps you out.

Diokaef · 03-23-2011, 02:57 PM

This may work for you http://www.clubrsx.com/cr/VIB-1792.html (but remember you should try to be with less then 9" long for the SS sec 1).

Nate2046 · 03-23-2011, 08:51 PM

Glad to hear you got it hooked up. Hard to believe no cats (headers or section 1) and a race muffler would be loud and raspy

I'm sure you can find some resonators that would weld into those pipes and tone it down a bit without really reducing flow. If not maybe a less agressive, chambered muffler? Anyhoo, howz about some sound clips

I'm sure it sounds vicious

Jbs · 03-23-2011, 09:06 PM

nothing wrong with a little rasp..

mfanatic325 · 03-23-2011, 09:51 PM

LoL your wish is my command. HD recordings will be posted later tonight, so stay tuned =]

sabbanick · 03-23-2011, 10:24 PM

cmark8 · 03-23-2011, 11:20 PM

What did I tell you about all that rasp? Hahaha! Only solution is to wear ear-plugs while you drive or sound-deadening bose headphones! I just kept my stock section 1 so I won't become completely deaf.

mfanatic325 · 03-24-2011, 12:44 AM

Whelp, here are the recordings I did earlier today...split into 6 total parts, starting from a complete cold start in the garage, to a slow warm-up, and a quick freeway merging pull. The camera I used was a Panasonic Lumix DMC-ZS3 HD camera/recorder. I also had the wind noise feature turned on, so the overall effect of the recording is very mellow. You may have to turn your speakers up. But the quality is very good

Though the rasp sucks

I'm going to post all 6 parts, but for most people, I would suggest watching only part 1 and part 6, for the cold start, and the freeway pull. So unless you're pretty bored, and would like to hear the car through various speeds with windows down for the most part, you really don't need to watch parts 2-5

Part 1

Part 2

Part 3

Part 4

Part 5

Part 6

Diokaef · 03-24-2011, 01:10 AM

video says private^^

mfanatic325 · 03-24-2011, 01:35 AM

Sorry, try again now. Had it set on private on accident to begin with.

Diokaef · 03-24-2011, 01:39 AM

dude you sound just like me on the video lol. Also you need my sec 1 just saying (feed the pig) lol

Diokaef · 03-24-2011, 01:41 AM

Also I think what is killing you is the headers not the S-pipe.

Diokaef · 03-24-2011, 01:42 AM

Do you DD your car?

mfanatic325 · 03-24-2011, 01:43 AM

Quote:

Originally Posted by Diokaef

dude you sound just like me on the video lol. Also you need my sec 1 just saying (feed the pig) lol

I'll see if it still sounds this bad after the SS x-pipe. Then will look into the resonator(s). Worst case scenario, I'll either sell my section1, or have someone fab a copy of the SS section1 and for me to put resonators into them

Quote:

Originally Posted by Diokaef

Also I think what is killing you is the headers not the S-pipe.

I did mufflers first, followed by headers, and now the section1. There was barely any rasp right after the headers, but then after I swapped the S-Pipe (section1) out, the rasp became what you hear in the videos: unbearable

Quote:

Originally Posted by Diokaef

Do you DD your car?

I try to use my MR2 as my daily driver, but the M is just too addicting sometimes. Especially if the weather is real nice out, or if I have a hot date or something lolol

03-23-2011, 01:29 AM	#1
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	Rasp Galore? EDIT: HD Recordings uploaded in post #16. Enjoy in HD mode! Why does the S54 motor rasp so much?! I just swapped out my stock section1 with a SuperSprint uncatted S-Pipe and omfg, the rasp is killing me I might hafta put some kind of resonator into the S-Pipe to reduce all the metallic rasp BTW, my current exhaust mods are (in order): JVT headers, SS section1, stock section2, SS race mufflers. I ordered my SS section2 (X-Pipe) a couple weeks ago and it's supposedly coming in from Italy and I should receive it in a week or so. But I know for a fact that it will add even more rasp The power from section1 swap is absolutely amazing though. Maybe it's because I have the headers and the ECU tune, but holy crap it surprised me when I first got on the throttle to test it out I'm just really not a big fan of rasp though... What to do, what to do... Last edited by mfanatic325; 03-24-2011 at 01:57 AM..
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03-23-2011, 01:33 AM	#2
BlackMoupe Mouper 113 Rep 1,064 Posts Drives: _____ Join Date: Apr 2010 Location: _____ iTrader: (1)	m3forum.net has many solutions. Rasp-B-Gone
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03-23-2011, 01:36 AM	#3
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	I'll look into that, thanks!
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03-23-2011, 01:39 AM	#4
BlackMoupe Mouper 113 Rep 1,064 Posts Drives: _____ Join Date: Apr 2010 Location: _____ iTrader: (1)	http://www.m3forum.net/m3forum/showt...highlight=Rasp
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03-23-2011, 01:43 AM	#5
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	LMFAO, I was just going to do a P.S. : "for future reference" and provide that link Thanks!
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03-23-2011, 06:25 AM	#6
onebluemcm Captain 42 Rep 632 Posts Drives: '07 Z4MC Join Date: Apr 2010 Location: Richmond, VA iTrader: (0)	You must resonate. It's not a big deal other than having to cut the new SS section 1. Resonators won't hurt exhaust gas flow like cats. I'd be surprised if any other x-pipe made it worse - removing the cats is the rasp creator. __________________ \|=.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-.=\| Silbergrau A08 / Sepang Brown LSD6 / Carbon Leather 4MY (1 of 3, this combo) RAC RG63 \| Conti EC-DW \| GC/Koni-Dinan \| Rogue RSM \| Arqray \| Autosolutions \| BMW brace \| Pinnacle tint
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03-23-2011, 12:24 PM	#7
Diokaef Engineer 212 Rep 2,122 Posts Drives: M235I 2015, 335i 2011 Join Date: Dec 2009 Location: TAMPA FL iTrader: (17) Garage List 2008 Z4M Coupe [6.33]	The AR20 or AR25 will be a pain to try to instal on your section 1 SS, you need a 9-10" resonator with a 4" body to use the SS sec 1. I tried that, trust me.
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03-23-2011, 02:47 PM	#9
Diokaef Engineer 212 Rep 2,122 Posts Drives: M235I 2015, 335i 2011 Join Date: Dec 2009 Location: TAMPA FL iTrader: (17) Garage List 2008 Z4M Coupe [6.33]	Nope, But I may be able to get you one from the manufactory that I'm working with but that will take me at list one or two weeks, its 9" long I don't know how much it cost but I can check if that helps you out.
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03-23-2011, 02:57 PM	#10
Diokaef Engineer 212 Rep 2,122 Posts Drives: M235I 2015, 335i 2011 Join Date: Dec 2009 Location: TAMPA FL iTrader: (17) Garage List 2008 Z4M Coupe [6.33]	This may work for you http://www.clubrsx.com/cr/VIB-1792.html (but remember you should try to be with less then 9" long for the SS sec 1).
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03-23-2011, 08:51 PM	#11
Nate2046 Lieutenant 16 Rep 421 Posts Drives: '11 e92M Join Date: Mar 2008 Location: Indianapolis, In iTrader: (2)	Glad to hear you got it hooked up. Hard to believe no cats (headers or section 1) and a race muffler would be loud and raspy I'm sure you can find some resonators that would weld into those pipes and tone it down a bit without really reducing flow. If not maybe a less agressive, chambered muffler? Anyhoo, howz about some sound clips I'm sure it sounds vicious
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03-23-2011, 09:06 PM	#12
Jbs The Photographer 76 Rep 628 Posts Drives: 07 Z4MC BSM/Black extended Join Date: Sep 2008 Location: Los Angeles iTrader: (0)	nothing wrong with a little rasp.. __________________ John Batte Photography / Flickr / Facebook 2007 ///M Coupe BSM/Black Extended/Loaded \| RPi GT Exhaust w/custom gloss black tips \| KW V3 \| Michelin PSS 245/265 \| Pinnacle F1 Tint 35% \| ZHP Shift Knob
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03-23-2011, 09:51 PM	#13
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	LoL your wish is my command. HD recordings will be posted later tonight, so stay tuned =]
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03-23-2011, 10:24 PM	#14
sabbanick Lieutenant 13 Rep 505 Posts Drives: 08 SBM M coupe Join Date: Sep 2010 Location: NY iTrader: (1)
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03-23-2011, 11:20 PM	#15
cmark8 M52, M62TU, S50US, S54, S65 75 Rep 569 Posts Drives: E90 M3 6MT, E36 Touring MT Join Date: Jun 2010 Location: +5511 iTrader: (11)	What did I tell you about all that rasp? Hahaha! Only solution is to wear ear-plugs while you drive or sound-deadening bose headphones! I just kept my stock section 1 so I won't become completely deaf. __________________ 1995 E36 M3 USA / 2002 E46 M3 SMG / 2008 E90 M3 6MT 1996 E36 328i Touring 5MT / 1998 E36 323Ti M Sport 5MT 2002 E39 540i Protection
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03-24-2011, 12:44 AM	#16
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	Whelp, here are the recordings I did earlier today...split into 6 total parts, starting from a complete cold start in the garage, to a slow warm-up, and a quick freeway merging pull. The camera I used was a Panasonic Lumix DMC-ZS3 HD camera/recorder. I also had the wind noise feature turned on, so the overall effect of the recording is very mellow. You may have to turn your speakers up. But the quality is very good Though the rasp sucks I'm going to post all 6 parts, but for most people, I would suggest watching only part 1 and part 6, for the cold start, and the freeway pull. So unless you're pretty bored, and would like to hear the car through various speeds with windows down for the most part, you really don't need to watch parts 2-5 Part 1 Part 2 Part 3 Part 4 Part 5 Part 6 Last edited by mfanatic325; 03-24-2011 at 02:25 AM..
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03-24-2011, 01:10 AM	#17
Diokaef Engineer 212 Rep 2,122 Posts Drives: M235I 2015, 335i 2011 Join Date: Dec 2009 Location: TAMPA FL iTrader: (17) Garage List 2008 Z4M Coupe [6.33]	video says private^^
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03-24-2011, 01:35 AM	#18
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	Sorry, try again now. Had it set on private on accident to begin with. Last edited by mfanatic325; 03-24-2011 at 01:41 AM..
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03-24-2011, 01:39 AM	#19
Diokaef Engineer 212 Rep 2,122 Posts Drives: M235I 2015, 335i 2011 Join Date: Dec 2009 Location: TAMPA FL iTrader: (17) Garage List 2008 Z4M Coupe [6.33]	dude you sound just like me on the video lol. Also you need my sec 1 just saying (feed the pig) lol
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03-24-2011, 01:41 AM	#20
Diokaef Engineer 212 Rep 2,122 Posts Drives: M235I 2015, 335i 2011 Join Date: Dec 2009 Location: TAMPA FL iTrader: (17) Garage List 2008 Z4M Coupe [6.33]	Also I think what is killing you is the headers not the S-pipe.
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03-24-2011, 01:42 AM	#21
Diokaef Engineer 212 Rep 2,122 Posts Drives: M235I 2015, 335i 2011 Join Date: Dec 2009 Location: TAMPA FL iTrader: (17) Garage List 2008 Z4M Coupe [6.33]	Do you DD your car?
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