» Site Navigation | | » Recent Threads | | 1999 M3 Swap 09-07-2023 10:10 PM 05-02-2024 08:18 PM 6 Replies, 405,334 Views | | | | | 04-18-2012, 06:55 AM | #1 | Member Join Date: Apr 2012 Location: Grass Valley Posts: 30 | Why so raspy? Why are dohc BMW's so raspy? I've read a few threads here recommending not to remove the resonator because it will make the sound way too raspy. I had a '92 525it 5-speed M50 and I removed the resonator, it made it raspy as hell so I put it back in. Why do these cars sound like this!? My 318ti sounds just as raspy and I don't get it! | | | 04-18-2012, 12:02 PM | #2 | Senior Member Join Date: Jul 2005 Location: Va Posts: 256 | I recall reading about a UUC exhaust designed to eliminate raspiness. I think they blamed the sound on VANOS. I wasn't aware that it was an issue with the non-VANOS DOHC motors. My first BMW was a '72 Bavaria. . .SOHC M30 with minimal exhaust. . .no cat. . .twin downpipes into a common resonator then single pipe to a muffler. Sounded pretty sweet! My DOHC M42 with a BroSpeed cat-back(no resonator) sounds about as raspy as that M30 did. Not bad for a 4-banger, IMO, but not as sweet as the six. The M30 in my E28 was quiet, but that had a full-length twin exhaust with cat + resonator. What kind of exhaust is on your Ti? | | | 04-18-2012, 07:21 PM | #3 | Member Join Date: Mar 2012 Location: iowa Posts: 90 | I think four cyl. engines are inherantly raspy sounding due to the unbalanced nature of the engine. I'm not sure how much better inline 6's are. The more pistins the better I'd think. Many four's have balance shafts in them to make them run smoother. Seems like larger diameter pipes make more hp but increase the raspy sound. I wondered about putting a motorcycle muffler on a car once, one with tunable baffles, never did it but wondered. | | | 04-18-2012, 08:47 PM | #4 | Member Join Date: Apr 2012 Location: Grass Valley Posts: 30 | My ti has stock exhaust. It's an M Sport, not sure if that is any different. I kinda like it, but its soo similar to the m50 in the e34 525it 5-speed I had. I used to joke about that car sounding like it had square pistons. The sohc m20 in my e30 has a nice smooth tone. The e30 sounded pretty good stock but it's even better with the Abarth muffler I put on it. I'd like to put a different muffler on the ti, since I paid so little for the car I just want to have fun with it. I'm considering a cheap ebay DTM muffler, there are several options under $100. Anyone have a favorite in that category? | | | 04-18-2012, 09:37 PM | #5 | Senior Member Join Date: Oct 2011 Location: Fremont, CA Posts: 148 | I just put a Magnaflow on mine and it was right at the $100 mark. I like the sound, but my wife thinks it is too loud. __________________ Trixie Alpine White 1996 BMW 318ti Sport | | | 04-18-2012, 10:41 PM | #6 | Senior Member Join Date: Feb 2012 Location: Sacramento, CA Posts: 2,451 | Quote: Originally Posted by jggonzalez I just put a Magnaflow on mine and it was right at the $100 mark. I like the sound, but my wife thinks it is too loud. | I have a Magnaflow on my other M42 and while I like the tone, my wife thinks it is too loud. I look forward to hearing yours to compare when we meet this weekend. __________________ 1998 318ti Sport - "Cali" Schwartz II/Schwartz sport interior, Cali top 1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52 1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior 1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior Other Current Bimmers: 2006 530i / 2000 2.3L Z3 / 1997 1.9L Z3 / 1999 540it 1997 318ti Sport - "Huera" - RIP 1995 318ti Active - RIP 1995 318ti Sport - "Tiny" Sold 1994 325i Sedan - "Jade" - Sold 1991 318ic - "Bert" - Sold 1985 635csi sold 1984 533i "Max" Sold 1984 318i sold BMWCCA #160411 SUPPORT 318ti.org! CLICK THE LINK ABOVE! Hosting a forum like this is not free. 318ti.org is one of the best BMW forums on the web because it is member supported, not vendor supported. The cost to become a Supporter is a nominal $10.00... A YEAR! DO IT! NOW! | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |
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