Ruadhd2 Posted September 27, 2011 Share Posted September 27, 2011 Who has a quiet exhaust system and how? Link to comment Share on other sites More sharing options...
Ruadhd2 Posted September 27, 2011 Author Share Posted September 27, 2011 By "quiet" I mean below 95db and sounds properly like a sports/racing car without hurting your ears or the neighbors; or the neighborhood pets' ears. Like maybe you could have a conversation with a passenger without screaming type quiet. Link to comment Share on other sites More sharing options...
locost7018 Posted September 27, 2011 Share Posted September 27, 2011 I have a stock GSXR1000 can on mine and it is almost too quiet. But then again I only have a 1300cc xflow. I doubt if it would be good for motors over 1600cc. Russ Link to comment Share on other sites More sharing options...
twobone Posted September 27, 2011 Share Posted September 27, 2011 definitly interested in other folks experiences. In the UK, everyone seems to point to these folks: http://powerspeed.co.uk/exhausts.html Techcraft: http://freespace.virgin.net/seven.workshop/tuningparts.html Link to comment Share on other sites More sharing options...
danilo Posted September 27, 2011 Share Posted September 27, 2011 There's an Older person in my neighbourhood that has a new Caterham. But the Muffler is so damn loud that it's sets off every Alarm on the street when he drives by even slowly.. every single time. He's Embarrassing in a word. One Neighbor is seriously thinking of seriptitiously painting "Too Loud' on the fool's car. Nothing cleverer than Audibly Identiying oneself to Every police officer within a Mile radius, without mentioning the wisdom of continually annoying the neighbors. Link to comment Share on other sites More sharing options...
BruceBowker Posted September 27, 2011 Share Posted September 27, 2011 Mine is stock from Caterham. Actually I would not mind just tad more noise but it is fine. Link to comment Share on other sites More sharing options...
blubarisax Posted September 27, 2011 Share Posted September 27, 2011 I've got the standard Caterham exaust. To get the car to pass the 88 db limit at Lime Rock, I put in a modified Dynatech Vortex Insert Cone (inserted just after the collector and before the muffler) and that did the trick. While power seems just the same, I do miss the louder sound on the track. It makes me think I'm going faster!!! Link to comment Share on other sites More sharing options...
twobone Posted September 29, 2011 Share Posted September 29, 2011 From powerspeed in the UK: yes we can make you a larger 6" repacakable type which will bring the noise down a lot, cost will be £350* + postage and VAT if that’s applicable * Link to comment Share on other sites More sharing options...
fastg Posted September 29, 2011 Share Posted September 29, 2011 Don't under estimate the motorcycle mufflers. The companies spend a fortune on R&D. They are in a highly competitive market where a few HP counts, performance and dyno numbers plastered in every magazine and web site days after being releases. Yet the bikes meet every sound regulation around the world, with the muffler just sitting there is full view. The high end race systems that have ear bleeding sound levels often only pick up 8hp on a 150hp bike. The volume of air they can handle is large, the modern sport bike at 16k is pushing a lot of air. You can often pick the stock ones up for next to nothing. I would have one on mine but the header is to close to the bodywork, so I went for a Hushpower. Link to comment Share on other sites More sharing options...
westy turbo Posted September 29, 2011 Share Posted September 29, 2011 Try to talk to wunnoff in uk,really satisfied with money,you choose the db,s Link to comment Share on other sites More sharing options...
readysetgo Posted September 29, 2011 Share Posted September 29, 2011 I agree with "fastg"...I have (Like Locost7018) a stock bike muffler, but from the GSXR750.... I don't know the db's...But there no way I'm louder then any Harley Davidson, or musle cars. And my exhaust is what...3 feet away from my head??? Link to comment Share on other sites More sharing options...
HOTTTCAR Posted September 29, 2011 Share Posted September 29, 2011 We put Hushpowers on Joe's car #119. Wow what a change. They produce a deep mellow tone that most every one enjoys. But i am not saying they are quiet at full throttle. Gale Link to comment Share on other sites More sharing options...
twobone Posted September 30, 2011 Share Posted September 30, 2011 (edited) Hi Michael, A larger diameter Silencer will help with your noise issue, the greater the area of the silencer the more it will reduce the dBA. We manufacture a Repack Silencer which is 6” Diameter (please see attached sketch for common dimensions), I have also attached a few images to show some of our previous work. I have attached a link from our noise test results we have previously carried out - http://www.wunoff.co.uk/images/WUNOFF%20WEB-SITE%20INFO2.pdf A non-cat Repack silencer is £220 GBP + VAT If you wanted to order, I would need to know the following; · External size of manifold/link pipe. · Whether you would like a Brushed or polished skin · Road of motorsport application · BHP of the engine If you have any further questions please do not hesitate to contact me Kind Regards Mark Hope BSc (Hons) Commercial & Plant Exhausts Ltd Design & Manufacturers of Bespoke Exhaust Systems Friars Works, Bradford Road, Idle, Bradford, BD10 8SX Web: http://www.wunoff.co.uk Edited September 30, 2011 by twobone Link to comment Share on other sites More sharing options...
twobone Posted September 30, 2011 Share Posted September 30, 2011 pics Re-Pack Outline Dims.PDF Link to comment Share on other sites More sharing options...
HOTTTCAR Posted September 30, 2011 Share Posted September 30, 2011 That's a class Act! Gale Link to comment Share on other sites More sharing options...
Ruadhd2 Posted October 1, 2011 Author Share Posted October 1, 2011 Anyone have a quieter exhaust solution running with rotary power? (much hotter and louder). Link to comment Share on other sites More sharing options...
Mondo Posted October 1, 2011 Share Posted October 1, 2011 I wonder if you could put a side exhaust, with a small resonator, then small muffler. Then route the tip thru the fender to the rear (some cars have this) and than put a rear muffler like this... Seems that would be the most you could do. The sound out the back would be less annoying than the side (especially if it's on your side). Link to comment Share on other sites More sharing options...
scannon Posted October 1, 2011 Share Posted October 1, 2011 A turbo is a good way to cut down on exhaust noise level. It also adds some fun to the drive. Link to comment Share on other sites More sharing options...
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