New Muffler, Want to try to make one???? Options

[PAPERBOY]

Brian,

I'd be a test case for a 4. I've got a '74 2.0, stock h/e's Bursch exhaust. I live in Waukesha county(New Berlin). I agree, you could sell a bunch of these for 4's. Let me know if you still need someone to try it out on, no problem recording the sound.


Jay

[Mueller]

at least for the /4's*, recording the sound is okay, but to me it's useless unless you can do a sound comparison back to back...........also, do you have access to measure the dB levels? (which again would need to have a comparison to help)


*/6 motors always sound awesome, it does not matter what muffler is installed (IMG:style_emoticons/default/smile.gif)

[736conver]

Jay,

I sent you a PM. I am just down the road from you.

Brian

[736conver]

I sent Sean a PM. I might be able to send one of these down to the FCC even if I cant make it.

[IronHillRestorations]

Any thoughts about a dyno test?

I realize 914'ers tend to be the, um, er, thrifty end of the Porsche spectrum. So $300 is in the right price range.

My personal preference would be performance first and sound second. I'm one of those oddballs that does not like Bursch (headers or "mufflers"), and prefers the sound and performance factory style mufflers. Not to big of a fan of loud exhausts.

PK (IMG:style_emoticons/default/cool.gif)

[736conver]

Just an update for the 4 poppers out there. It will take some time to develop.
Its going to be hard to keep them in this price range with the flanges. I will update everyone when a 4 gets developed.

[MartyYeoman]

I like the packaging of using a Flowmaster cross-flow for a 914-4 application. However, the question I have is: How is the crossflow accomplished within the Flowmaster muffler (42582 I presume). The firing order of a 4 cyl is 1-4-3-2. This means that first one head fires both cylinders then the other (alternating back and forth). Without communication between the two wouldn't the exhaust also alternate between sides? Has anyone looked into this?

[Demick]

When I did my muffler, I looked into using one of these 2 in 2 out flowmasters much like the picture Aaron shows on page 1 of this thread. Problem was that the muffler was too long to fit between the exhaust flanges (considering tubing bend radii and room to combine from the dual pipe exhaust flanges of the heat exchangers, etc). I would have had to go from the exhaust flanges 90 degrees outward, and then 180 degrees back inward to the muffler inlets. That was too much work. Much easier to just weld on a regular 40 series onto the 4-1 collector. But of course with this, you don't get the dual muffler outlets.

Demick

[Aaron Cox]

ahhh grasshoppa,

this dynomax muffler is small enuff to fit between both flanges of the heat exchangers (IMG:style_emoticons/default/biggrin.gif)
this would also require a little u bend too. the bursch exhaust already has 90 to 180 degree bends in your picture. my drawing isnt done yet...just to give you an idea. also. my current bursch already has 2.25 inch tubing, seems very doable to me (IMG:style_emoticons/default/biggrin.gif)

[Aaron Cox]

the flowmaster's case is 2" bigger and overall 3.5" longer...............too big (IMG:style_emoticons/default/wink.gif)

[Demick]

Yep

Just what I was talking about. Too much work for me. Yes, some of the bends and flanges from a hacked up Bursch or equivalent could be used. One problem - the 90 degree bends out of the HE flanges only go toward the right. You will need one set that bends to the right and one set that bends to the left. It will also then be a PITA to combine each pair of tubes before entering the muffler.

Like I said, too much work for me.

Demick

[Aaron Cox]

Yep

Just what I was talking about. Too much work for me. Yes, some of the bends and flanges from a hacked up Bursch or equivalent could be used. One problem - the 90 degree bends out of the HE flanges only go toward the right. You will need one set that bends to the right and one set that bends to the left. It will also then be a PITA to combine each pair of tubes before entering the muffler.

Like I said, too much work for me.

Demick

my bursch has one that goes left, and one that goes right. it goes 4 - 2 -1 and then the muffler... yours is a 4 - 1

[Demick]

Ahhhh. Well that will save you a lot of work then.

Demick

[tracks914]

My initial thought was to make a SS exhaust similar to the factory original but with a bigger expansion chamber and a bigger (single or dual) outlet to give it a throatier sound. Anybody try this or just adapt another exhaust system to a teener? <_<

[Aaron Cox]

My initial thought was to make a SS exhaust similar to the factory original but with a bigger expansion chamber and a bigger (single or dual) outlet to give it a throatier sound. Anybody try this or just adapt another exhaust system to a teener? (IMG:style_emoticons/default/dry.gif)

you dont like my idea>? (IMG:style_emoticons/default/ohmy.gif) (IMG:style_emoticons/default/sad.gif) jk (IMG:style_emoticons/default/laugh.gif)

[tracks914]

you dont like my idea>? (IMG:style_emoticons/default/ohmy.gif) (IMG:style_emoticons/default/sad.gif) jk (IMG:style_emoticons/default/laugh.gif)

I love your idea...I just like mine better. (IMG:style_emoticons/default/biggrin.gif)



All those bends without a good bending machine sounds like a lot of work. I just thought my way would be a bit easier and still get the deeper sound I am looking for, but until I try it I will never know. (IMG:style_emoticons/default/wacko.gif)

[Aaron Cox]

you dont like my idea>?  :o  :(      jk  :lol:

I love your idea...I just like mine better. (IMG:style_emoticons/default/biggrin.gif)



All those bends without a good bending machine sounds like a lot of work. I just thought my way would be a bit easier and still get the deeper sound I am looking for, but until I try it I will never know. (IMG:style_emoticons/default/wacko.gif)

my unc has a mandrel bender (IMG:style_emoticons/default/wacko.gif) (IMG:style_emoticons/default/wink.gif)