16MS exhaust query

middleton1 · Post by **middleton1** » Mon Feb 21, 2011 11:03 pm

I've posted a photo of the exhaust pipe from my 53 16MS. Any suggestions/advice greatly appreciated.
Thanks, Nigel

ianselva · Post by **ianselva** » Tue Feb 22, 2011 9:15 am

I dont quite understand what youre asking.
it looks like it has a slot in the side and a plate welded over the end as a baffle . It looks like the plate is too close to the end of the pipe. Get the slot welded up and just perforate the end plate with a drill.

middleton1 · Post by **middleton1** » Tue Feb 22, 2011 12:14 pm

There are 4 slots located around one side of the pipe only and it's one of the strips between the slots that has detached itself. Anyone know what the purpose of the slots is? The end plate is fixed in 2 places. I wondered if a previous owner had at some point modified the pipe.

paul knapp · Post by **paul knapp** » Tue Feb 22, 2011 12:40 pm

The slots are to let the exhaust gas out since the end of the pipe has been capped!
Forcing the gas out sideways into the silencer box tends to muffle the sound of the exhaust.

Eric · Post by **Eric** » Tue Feb 22, 2011 1:51 pm

AMC used different forms of adding a baffle system to their silencers one was very similar if not the same as in your photograph, four slots toward the end of an otherwise plain capped pipe.

Another method did exactly the same thing but used holes instead of the slots.

I once set eyes upon an original pipe for a 500 twin this had four rows of 4 holes where each hole was 7/16" dia and the centres of each hole were offset to the centres of each hoe in the adjacent rows.

I think the hole system came later than the slots, probably because it was easier to do.

Both ideas provide a simplistic method of providing baffles that were considered adequate for silencing at the time.

The end cap was just that, a blank cap and had no holes in it.Edited by - Eric on 22 Feb 2011 1:53:05 PM