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Posted by: jacksun Apr 18 2014, 02:01 PM

hi, curious as to if this is a correct muffler for 73 1.7l?

part number is 021251053D as given by the seller...

auto Atlanta has the "D" as being for a 2.0L. and "C" for 1.7L

the distance measured from centers of the single hole side is 25 3/8 inches

he measured and has 25 1/2 inches..

so????

tks

randal




Attached image(s)

Posted by: bdstone914 Apr 18 2014, 02:15 PM

QUOTE(jacksun @ Apr 18 2014, 01:01 PM)

Posted by: jacksun Apr 18 2014, 02:50 PM

QUOTE(bdstone914 @ Apr 18 2014, 04:15 PM)

QUOTE(jacksun @ Apr 18 2014, 01:01 PM)

hi, curious as to if this is a correct muffler for 73 1.7l?

part number is 021251053D as given by the seller...

auto Atlanta has the "D" as being for a 2.0L. and "C" for 1.7L

the distance measured from centers of the single hole side is 25 3/8 inches

he measured and has 25 1/2 inches..

so????

tks

randal

That is a 1.7 muffler. Definitely not 2.0 which is a banana shape. The 1.8 looks much the same with the exit on the end. Will still fit a 1.7L
Bruce

Posted by: Dave_Darling Apr 18 2014, 05:27 PM

Here's a diagram that can help you tell the difference:




Depending on what you mean by "the single side holes", it sounds like a 1.7 or 1.8 muffler. The 1.8 mufflers were a sausage shape, much like the 2.0 ones, without the flange sticking out around the body of the muffler. The one in your picture has the flange, so I'm pretty sure it is a 1.7 muffler.

--DD

Posted by: cpavlenko Apr 18 2014, 06:43 PM

That's a great diagram for the sizing. I'm going to make a copy of that for my records, that's if don't mind...

Posted by: jacksun Apr 19 2014, 10:01 AM

thanks for the diagram and the info

randal

Posted by: Dave_Darling Apr 19 2014, 11:12 AM

Not my diagram. I swiped if off Jeff Bowlsby's site. I knew about it because he had posted it here before...

--DD

Posted by: r_towle Apr 20 2014, 05:47 AM

I thought the ends of the heat exchangers had the flange upside down on 1.7 versus the 2.0

Meaning the two bolts are on top for one type and on the bottom for the other type???

Second point.
There are bus mufflers out there that are being passed off as the OEM porsche 914 muffler yet they have the exit on the passenger side and you need the cross over pipe to get it over to the drivers side exit in the valance.

From what I have seen, those don't line up correctly, but it can be made to work.

Have him post a picture of the other side of that muffler to be sure.

Posted by: jacksun Apr 20 2014, 06:33 AM

another image of same muffler.

I checked the existing, ( soon to be replaced) heat exchangers and their orientation

is as depicted in the diagram provided above. single hole on top...


thanks for the info....

randal








Attached image(s)

Posted by: r_towle Apr 20 2014, 07:43 AM

Buy it, those are no longer being made.
Get it coated again so it lasts...

The next replacement will be a bus muffler

Posted by: jacksun Apr 20 2014, 09:32 AM

QUOTE(r_towle @ Apr 20 2014, 09:43 AM)

Posted by: pete000 Apr 21 2014, 12:27 PM

Why did Porsche change the exchanger design for the 2.0 cars? I understand the dia is slightly bigger. On the SSi replacement the dia is the same for both designs. Just wondering why they flattened out the rear bends on the 2.0 To make more power?