Best Muffler For 930

[matthew1turbo]

Can anyone recommend a good muffler for my 82 930, thinking of B&B or hayward & scott in uk....

[sand_man]

I've ordered this (another RarlyL8/M&K product):
Passenger's Side Muffler Ready For Testing

More info here:
http://www.rarlyl8.com/

[sand_man]

BTW, there is a Turbo forum:
http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/

[kcpaz]

DON'T GET B&B. Their 930 system never fits without modification to the wastegate pipe.

[RarlyL8]

What flavor would you like?

Stock Outlet:




Dual Outlet:




Passenger's Side Exit with Matching Waste Gate Dump:




Or maybe no muffler at all:



Note: Pelican has agreed to carry these items so it is OK to show them.

[9dreizig]

Go with Rarly's !! but who needs a muffler when you can get a Zork tube??

[Emission]

I have a Fabspeed dual-out, and I am happy with it. But, if I had to do it again, I would go with a RarlyL8/M&K solution.

[spuggy]

Ha. A Zork only routes flameballs past the body work, LOL. I think in the UK it'll get you an ASBO on a daily driver, and on first-name terms with LEO pretty quick. Don't kid youself it'll make track noise limits either, because I think they make exceptions for real 935s on special occasions that they're not prepared to make for you...

People who tell you "a turbo quiets it down a lot" - why, yes it does. It quiets it down a lot in comparison to headers sawn off 3 ft from the exhaust port. So it's a little quieter than a pre-war racing Bentley with 2 ft headers. That really isn't the same thing as "quiet". Or even "vaguely legal".

An open pipe on a idling 930 will set off car alarms 20-30 feet away. At least. I think my record was 60 or 80 ft. At 1200 RPM, inching round a multi-story with the clutch fully home. Which means that you mark your progress through city streets with triggered alarms on parked cars. Yah, very smooth...

Rarly's mufflers are very nice, and I will certainly buy one when I go back to the US. Without noise info, I have some reservations as to how well they would translate to a Nanny State setting, but that probably also has a lot to do with where/how often you drive the car and how much attention you want/are prepared to attract.

I'm betting that all of the US "roll a baseball through it" stuff would be totally unacceptable in the UK, at least to me, for my purposes. Rarly's stuff, with the (optional) noise absorbant material in the expansion chamber would be somewhat quieter than that.

[GaryR]

I would go with Rarly's muffler. I have a Fabspeed single out and the darn thing is too quiet on the track (and you can roll a tennis ball right through it)..

[RarlyL8]

Zorks are for the hard core, no doubt about that. It's a 12" pipe off the turbo, there should be no dilusions of muffling.

The sound deadening material silences the beast. You still get all the cool noises but at a very acceptable volume level.

[spuggy]

Originally Posted by RarlyL8

The sound deadening material silences the beast. You still get all the cool noises but at a very acceptable volume level.

Heh. "acceptable" is so subjective, and so much of this doesn't translate culturally. Rarly, this was why I was asking for dB readings...

Main street in my town is two lanes, ~14 ft wide. For some of it, the sidewalk is 4ft wide, and then the fronts of the 2-3 story buildings start. At other places, the sidewalk is maybe 8-12ft wide. Then the 2-3 story buildings etc.

Even the coffee-can exhausts they sell to ricers here are only a fraction louder than stock factory exhausts - and if it doesn't have the BS-approved kitemark, it's illegal, strictly speaking. They enforce noise regulations here, both on the street and at the annual inspection.

You get much more slack as an older fart in a 911 than a kid in a riced-out Civic or WRX, but something that a cop in the US wouldn't even register is pretty darned obvious around here. That's all I'm saying... Sheesh, 20 years ago, I had cops pulling me over for REPLICA FACTORY PIPES - WITH BAFFLES! on a '64 Sportster.

[RarlyL8]

Extreme examples bring out the good questions.
If a muffler must be approved by DOT/TUV/CARB or whatever then mine will not do, nomatter how quiet it is.
Unfortunately dB readings only give one data point. I can make you a quiet muffler that also sounds dead, robs power and drones from 1500-3000rpm. Sound quality is very difficult to relay. I am working on how to produce fine audio that will accurately represent the experience.

So the question to the original poster becomes: what do you want in a muffler?
What expectations on quality, design, sound, price, etc. May be simply a process of elemination.

[sand_man]

Whatever you decide - and my hope is that your local inspection/sound laws allow you to support the RarlyL8 efforts - just say "NO" to B&B!!!!!!!!!!!