How to get quiet without a muffler, Exhaust Inserts....... Options

[john rogers]

Long ago when I raced Harley Davidson motorcycles we would drive them around on the street to tune and test them. We needed to quiet them down some and we used a steel multi disk insert with center tube which worked well. We would remove it to race. I just put one in each exhaust stinger on my 914 vintage six race car and they worked very well so hopefully I won't have to put the muffler on between races. An additional benefit is the cooler for the tranny sits right over the muffler and becomes a tranny heater, but no longer!! Available from Summit Racing and the 3 disk ones I bough were about $50 each.

[scotty914]

well i like my triad inspired exhaust i made for less than $75. if it is anything like triads for loss of hp, which it should be since he told me how to make it ( (IMG:http://www.914world.com/bbs2/html/emoticons/pray.gif) triad dave ) i will have only lost about 6 hp, out 175 or so. and it sounds sweet and type 4 ish, even though its a suby.

but i almost went with the summit muffs with disks, but i wanted the balance between the cylinder banks

[Triaddave]

scott, did i read this wrong when you said a loss of HP ? usually you gain HP with the triad, (triad inspired).

[scotty914]

QUOTE (Triaddave @ Mar 14 2005, 08:47 PM)

scott, did i read this wrong when you said a loss of HP ? usually you gain HP with the triad, (triad inspired).

sorry dave you did not mis read i mistyped, i meant a loss of 6 hp from an open exhaust, or a gain from a stock exhaust.

and john if you want a sweet muffler set up with as little loss from your open pipes as you can get BUY a triad, and its even quite enough for daily driving. nothing like a gain over stock with a better sound. (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

[john rogers]

Thanks for the info but I have a really good muffler, but I just do not want the hassle of having to switch it on and off. I am not currently doing any events that require any noise reduction so it is mainly for driving around and testing.

[cha914]

John,

Do you have a summit part #? or what brand are they? I would like to run my stinger for an upcoming event and would rather not have to change exhausts at the event. How are they held in the stinger?

Thanks,

Tony

[Qarl]

Try this...

[john rogers]

Here you go. I had to modify them slightly as my stingers are tapered and these are for a straight pipe. I notched the front and back discs and expanded them slightly. I noticed that at idle the car was loud, but at 3500 RPM it was about as quiet as the muffler?

http://store.summitracing.com/default.asp?...t=egnsearch.asp