crg53

I am toying with the idea of fitting a complete 993 exhaust on my 964. I have the heat exchangers already and know the right side flanges needs to be turned 90 degrees, no problem. I am thinking of a DACH X pipe from headers to mufflers that should be straight forward. The 993 mufflers is what I am concerned about, will they fit the 964, I have read that with slight modifications to the top of the muffler and to the rear bumper supports, they will fit using stock mounting hardware; IS that the case? Any insight and help will be greatly appreciated.
Thanks in advance.

crg53

O.K. If this is not a good idea, which other possibilities do I have for mufflers or muffler using the 993 HE. I like the idea of using the stock system, but am open to any suggestions.

PChar

I know many other 964 owners have been toying with the same idea, including myself.

I found someone in Maryland (I believe) who would do the flange removal and turn 180 deg., and he has some muffler options you can discuss this with Him. Here is his contact Info:
http://instant-g.com/Products/Exhaus...Out/index.html

I am at the same point where I want to pull the trigger on this, but need additional input from thos who have them. I know they are out there,..

Keep us posted of your progress

Bill Verburg

A little known fact is that the original 964 3.6RS was the first car to use the 993 style exhaust pictured here





the issue for you is the narrow a restrictive fenders that just don't have the room for the side mufflers.

Rather than side mufflers why not think about light weight rear mounted alternatives similar to what was used here, both Coast and Burns offer mufflers that might work

crg53

Thanks for the input, I will keep you posted on which way I end up going.

Gus

Bill is right, to fit the side mufflers you need to make some serious mods to the fender well area . Right side is the worse as you need to move the oil filter and oil lines. Plus fabricate mounting brackets. It would be easier to have a center muffler system married to the 993 headers and then route the exhaust like a stock 964.

trophy

If anyone is after a set of 993 Headers, PM me.

Black930

+1 Bill said it best.

crg53

Thanks guys, it looks more and more like the best solution is the muffler across the back, too much trouble fitting the 993 mufflers. I know from conversations with Steve Weiner that a 2 in 1 out Monty or Dansk muffler across the back is a very possible solution, and by far the easiest way to go, will give that some more consideration.

Anatol

Since I took the pics above, I take the liberty to correct Bill: actually it was the 964 RS 3.8 that used a 993-style exhaust. The usual 3.6RS uses the same exhaust like any other C2/C4.

So width of body seems to be an issue. However, ages ago, someone posted pics of a conversion on this forum. Something like ten years ago...

Bill Verburg

Yeah that was a typo and thanks for the pics

Metal Guru

There are two styles of 993 heat exchangers: the Bischoff ones exit at a 45 degree angle and the Gilllette ones exit parallel to the bumper.

The flanges that meet up with the engine have to be flipped for the right hand bank. Building a muffler shouldn't be a big deal. If anyone is interested contact Ben at M&K Exhaust. He has recently purchased a 964 RS America replica and is developing mufflers for the line. He's done headers for Turbos using Bischoff heat exchangers (I own a set; they are outstanding and were not a fortune compared to other turbo headers) so he is familiar with the hardware.

Bill Verburg

That's not true at all. The difference between 993 Bischof and Gilette is only in the configuration of the outlet flange of the header, Bischof are elongated ovals and Gilett are more circular, they are oriented in the same plane

The mufflers are also somewhat different but are interchangeable, on the left are Bischof with a removeable sealing doughnut on the right are Gilette w/ integral doughnut



here's the doughnut

crg53

Metal Guru is right in that there are 2 different HE designs for the 993. The Bischoff HE's for the 1995 model 993 sans varioram had oval exits that were angled more towards the back than the later Gilettes that have a more rounded exit with a triangular flange. I have a set of Bischoff 1995 HE pictured below. In the smaller picture you can see the difference between on the DACH X pipe, top one is for Bischoff, bottom is Gilette.

ZG862

Bumping an old thread.
Has anyone completed this on a narrow body?
What was done and was it worth it?

Z