how can i make my SC roar

[frz]

how can i make the SC sound great?
what improvements can i make with out a full s/s exhust

can i squeeze a little more out of her performance

[DANNOV]

I have a 1985 Carrera, I'm very happy with my stock muffler modified with a new exhaust pipe welded to the right side. It sounds good and there is a noticeable increase in power coming in at about 4000 rpm. On a USA Carrera, a modified twin pipe exhaust coupled with a a Euro pre-muffler gives about 12 -15 hp additional ( per B. Anderson). For details, see my earlier posts on this subject on this website. In the USA the muffler mod cost me $200, but some have had it done for less than $100. Cheap way to get some good sound and a bit more HP. I don't understand why so many people here in the US go to expensive aftermarket mufflers and SSI setup on a Carrera. You can achieve nearly the same HP increase with modified stock muffer (dual outlet) and Euro pre-muffler. On a SC the results may be a slightly different but I doubt if the aftermkt muffler + SSI is cost efficient. Lot of additional money for a bit more HP. Convert your stock muffler to a dual outlet and see what happens, you might be pleased.

[rstoll]

Knock the stuffing out of your cat and hang on a Bursh Carrera muffler.

[Superman]

From all I've read, it sounds like the SSIs are necessary for power gain on an SC. On an SC, I doubt that the muffler change alone would increase power much.

I will agree that knocking the stuffing out of your CAT will improve the sound. It gave my car that deep, hollow 'big block' sound. Particularly at idle. Sounded pretty serious. It did not improve noise or volume at higher RPMs though.

[DANNOV]

Originally posted by Superman
From all I've read, it sounds like the SSIs are necessary for power gain on an SC. On an SC, I doubt that the muffler change alone would increase power much.

I will agree that knocking the stuffing out of your CAT will improve the sound. It gave my car that deep, hollow 'big block' sound. Particularly at idle. Sounded pretty serious. It did not improve noise or volume at higher RPMs though.

Over the past 18 years I have owned both a 1977 911 (3 yrs) and a Carrera (15 yrs), and I think the stock muffler is not only wimpy sounding but also very, very restrictive. With the exception of the Bursch (a loud low quality muffler that will soon rust away), aftermarket SS mufflers are very expensive. I urge an SC or Carrera owner to modify the existing stock muffler with a dual outlet. It is cheap, and you will hear the difference, and if you are really atune with your automobile you will also feel it. YOU DON'T NEED TO SPEND BIG BUCKS ON A FANCY MUFFLER. On the SC I agree the SSI heat exchangers will gain more HP than on a Carrera, but you pay a lot for those horses. Paying big bucks for a aftermarket muffer is a waste of money and SSI heat exchangers add to the pain. The way to go is modified stock muffler, combined with cat bypass or euro pre-muffler, and in my humble opinion I think that is true for an SC or Carrera.

[Eric Coffey]

Oh come on, live a little. Get a set of Jerry Woods' headers and mate them up to a pair of megaphones!

[Adam]

Well, I'm keen to make one of these up...



I'm now just looking for a Euro pre-muffler to butcher and modify. Image courtesy of Emcon5. He had one previously installed on his SC and said it sounded mean. He even posted an MP3 of it on a recent thread.

[Leland Pate]

I'm going to be attempting the "Flowmaster Special" conversion when I get home.

The parts are all waiting for me... and I only spent $170 for the muffler, two J pipes and a set of SS Borla tips..... we'll see...

[Kemo]

You can always put a SCWDP sticker on your car. I hear it makes your car go faster. Since im no longer a lurker...i can say stuff like that.

[911nut]

Originally posted by DANNOV

I urge an SC or Carrera owner to modify the existing stock muffler with a dual outlet. It is cheap, and you will hear the difference, and if you are really atune with your automobile you will also feel it. YOU DON'T NEED TO SPEND BIG BUCKS ON A FANCY MUFFLER. On the SC I agree the SSI heat exchangers will gain more HP than on a Carrera, but you pay a lot for those horses. Paying big bucks for a aftermarket muffer is a waste of money and SSI heat exchangers add to the pain. The way to go is modified stock muffler, combined with cat bypass or euro pre-muffler, and in my humble opinion I think that is true for an SC or Carrera.

Dannov, I couldn't agree more. There is one more way to peel this onion, though. I gutted my stock mufler and replaced the long internal pipe and packing with two baffles, maintaining the single outlet. Also I'm running a test pipe in place of the cat. I'll add a pre-muffler this spring only because it's still a little loud. At idle it sounds like a turbo and at 5000 rpm sounds like a serious race car.
Whatever you do, don't gut your cat and use it. It'll knock off about 10 HP. Also, don't buy SSIs unless you hit the lottery. In spite of what people say who have them, they don't provide hardly any more HP than a bypass pipe and a low restriction muffler (Bruce Anderson himself only measured 1/2 HP advantage between SSIs and a 2 in/2 out muffler vs a test pipe and a Performance Products sport muffler on a .32 Carrera).

Adam

You don't happen to have a link for that MP3 file do you?

[DANNOV]

Originally posted by 911nut


Dannov, I couldn't agree more. There is one more way to peel this onion, though. I gutted my stock mufler and replaced the long internal pipe and packing with two baffles, maintaining the single outlet. Also I'm running a test pipe in place of the cat. I'll add a pre-muffler this spring only because it's still a little loud. At idle it sounds like a turbo and at 5000 rpm sounds like a serious race car.
Whatever you do, don't gut your cat and use it. It'll knock off about 10 HP. Also, don't buy SSIs unless you hit the lottery. In spite of what people say who have them, they don't provide hardly any more HP than a bypass pipe and a low restriction muffler (Bruce Anderson himself only measured 1/2 HP advantage between SSIs and a 2 in/2 out muffler vs a test pipe and a Performance Products sport muffler on a .32 Carrera).

At a DE event at Road America last year I met a guy who gutted his Carrera muffler and had a second tailpipe welded on to the right side. You could look into one tailpipe and see light from the other side. It was loud, LOUD! But he had a metal cap fabricated that fit over the right tail pipe for street use. That made a huge difference, it was still loud but acceptable for street use. However, it was about as far as anyone should go unless you like noise.

[frz]

well i have to say you boys are chapter an verse
you are the bomb!

[mattd]

Does the "dual outlet" modification for the stock Carrera muffler require any internal changes? Or is it just cut and weld?

TIA

Matt

[DANNOV]

Originally posted by mattd
Does the "dual outlet" modification for the stock Carrera muffler require any internal changes? Or is it just cut and weld?

TIA

Matt

A new exhaust pipe is welded to right side, internals are unchanged. Sounds great, its cheap, and it adds a bit of power at 4000+ rpm. You have to cut the rear bumper valance for the new pipe, but that it is a small and easy job. The biggest problem for my mechanic was to find an exhaust pipe that matches the stock pipe on the left side. He got one that is identical to the stock pipe, it looks nice.

[mattd]

Thanks Dannov, for the info.

Also - Mikkel - here is the link to that MP3:
http://www.pelicanparts.com/MotorCity/emcon5/911sc.MP3

Matt

[mattd]

Hey Dannov,

Do you know where your mechanic ended up finding the pipe?

Matt

[DANNOV]

Originally posted by mattd
Hey Dannov,

Do you know where your mechanic ended up finding the pipe?

Matt

I don't know, but he initially mentioned the possibility of salvaging a pipe off an old Porsche muffler. The pipe he put on looks like a new one and has the same up-turned edge as the stock pipe, a perfect match. He charged me $30 for the pipe itself.

[Steve W]

I have to go with Dannov on this one. I ordered and am still waiting for the stainless 2 1/4 j pipe I ordered from jegs.com to show up so I can cut a section from it and have a right side tip TIG welded on. Then I'll slip on a stock black Porsche exhaust tip over it for a identical look. The 2 1/4 end will have to be swaged up to 2 3/8 to accept the tip. Here's the chart section of the B. Anderson article Dannov scanned me showing the hp similarities of ssi/w dual outlet muffler vs stock/w extra tip on 88 Carrera. Bottom graph is stock hp.

[widebody911]

I have a dual-in/dual-out B&B muffler for sale, and I know someone who has the headers FS. That will get you some roar!