You are not logged in or registered. Please login or register to use the full functionality of this board...


Alternate Muffler Replacement
Sad I recently had to replace the muffler on my 99 Newell. The original was the Riker model as documented in other threads. I could not find the Riker on line, and I wondered if there was a financially efficient solution than ordering one from the mothership. 

I did not want to use a straight pipe, and I really didn't want to do any major welding or modifications that would prevent the use of the original style Riker. 
I opted to use this round muffler.
You also need a elbow to transition out of the existing flex tubing into a horizontal run.

You need two clamps
And a short piece of round tubing to make an exhaust tip.

I used an angle grinder to get the length and angle right.

I used two generic muffler hangars to support the muffler at the elbow, and at the exhaust tip. Total modification to the coach was to drill one hole for the aft hangar. 

Initial results are the sound is no louder than the original muffler. I will report on maximum turbo boost, fuel mileage, and jake brake sound when I have some miles on this setup.
Richard and Rhonda Entrekin
99 Newell, 512
Subaru Outback Toad
Inverness, FL (when we're home Cool )
Nice write up Richard, thank you! Missouri Mike is building mine with a straight pipe so I'll be looking to put a muffler on when I get it back home. The links will really help.
Jon & Chris Everton
1986 40' Dog House #86
0 hp 8V92 Allison HT740
Soon to be 500 hp ISM 6spd ZF
It looks really really nice, great job! Thanks for sharing all that information.
1988 40ft Newell Classic
8V92 TA Mechanic
Allison 740 (4 speed)
This is a follow up to the original post. I now have about 2500 miles on this setup. I notice NO additional increase in noise at idle or full bore. The jakes may be slightly louder, but certainly no more obnoxious than the old muffler. I do not see an increase in maximum boost.

I do sense marginally quicker spool up of the turbo when starting up a grade.

I do see an 0.1 to 0.2 MPG increase over the fuel mileage from previous long term monitoring.
Richard and Rhonda Entrekin
99 Newell, 512
Subaru Outback Toad
Inverness, FL (when we're home Cool )

Forum Jump:

Users browsing this thread: 1 Guest(s)