TR2/3/3A TR3 Exhaust System - how does it fit

[PatGalvin]

Gents

I loosely installed stock TRF exhaust system. Pipe from manifold to frame box section fits perfectly. But the first long (22 inches, I think) muffler fouls the frame and nearly the differential pinion flange too. Does anyone have a picture of how the exhaust should be oriented. I don't think I have this backwards - that would be difficult to do.

Thanks

 

[TR3driver]

As I recall, the front of the muffler has to be turned "just so" and supported, so it actually fits inside the flanges on the frame. And even then, it almost touches the diff with the rear suspension at full droop.

Last time I installed a repro system, I also had to make up a short bend to go between the two mufflers.

Now you know why I just take them to my local muffler shop these days

 

[Geo Hahn]

Here's some photos that may help. As Randall notes, the front of the foreward muffler sort of nests in the sideways U of the frame...

One problem you may have is that not all mufflers are the same length. Mine (Falcon S/S) is 20" long, I recall another that was more like the 22" you mention -- that extra 2" may make things a tight fit.

Here's a shot around the diff -- getting everything in just the right location fore & aft allows the mufflers to sit level and have enough clearance.

I usually slip a bit of fuel line over any spot that looks like it might make contact on a real hard bump (e.g. the bottom lip of the frame box or that seat belt bolt in the 2nd pic).

PS -- Now that I look closely I see that same bit of fuel line on some other things like the hard fuel line and brake lines where they near or pass thru the frame (yes there are grommets at the pass thrus but I like to be sure)..

 

[vivdownunder]

The problem is that current repro mufflers are too large, being about 7" wide x 5" deep. This makes it difficult to run the muffler front pipe through the frame cross without the muffler casing hitting the floor. Also, these oversize mufflers usually foul the frame at the front LH side, and I've seen owners having to cut a corner off at an angle and weld in a closure.

Original mufflers were 5" wide x 3" deep.

I too now only use a local exhaust shop with access to all muffler makers. He supplies an "off the shelf" 20" long x 5" wide x 3" deep glasspak straight through muffler to take 2" exhaust pipes in and out. This size clears the floor, frame and axle housing, and modern materials render it quiet enough not to need a second tail muffler. The exhaust shop makes up a length of front pipe to marry up with the engine pipe, and the whole set up fits trouble free.

Regards,

Viv.