A quieter PT422

Phils · Nov 17, 2004

I had discussed this in the "customization" forum, and since it's done and working I thought it appropiate to post the photo here.

I installed a Supertrap muffler on my 422 a week ago. It provided a significant decrease in noise. The machine is now only as loud as a normal lawn tractor (which is about half as noisy as it was). I initially installed it according to the directions, with a hose clamp. As I expected, after about a half hour of stump grinding it fell off, with the sudden increase in noise making it obvious what had happened. I reattached it temporarily with a couple of screws and will weld it on next chance I have.

Total price for it was $90, which included the muffler, resonator and three 3-paks of discs. The application says to use one disc for each 3HP, so I should have needed 7 but since you buy them in paks of 3, I put all nine on. I've noticed no reduction in power, only less noise.

Phil

MuncyBob · Nov 17, 2004

Thanks for the pic and info...looks like a muffler on a muffler? This won't have any negative effect on the engine I /forums/images/graemlins/confused.gif hope!

pequeajim · Nov 17, 2004

WHere did you get this from?

Phils · Nov 17, 2004

I got it from Jacks Small Engines dot com:

Supertrap muffler

Phil

Phils · Nov 17, 2004

I can't imagine anything bad it could do, as there's no perceptible back pressure with those 9 plates installed.

( This won't have any negative effect on the engine I hope! )

ontheweb · Nov 17, 2004

( The application says to use one disc for each 3HP, so I should have needed 7 but since you buy them in paks of 3, I put all nine on. I've noticed no reduction in power, only less noise.

Phil )

Hmmmm, the application I read on the Web said to use 1 disc per every 7HP, and you are using 9?

Phils · Nov 17, 2004

( Hmmmm, the application I read on the Web said to use 1 disc per every 7HP, and you are using 9? )

 It's one disc/7hp for the 5", and one disc/3hp for the 3". The 5" wouldn't fit on my PT without some major muffler mods. I wanted something simple.

pequeajim · Nov 17, 2004

How did you fit it on with the square pipe coming out of the muffler?

Phils · Nov 18, 2004

Mine has a round pipe coming out of the muffler. I figured there have been enough different mufflers that I should show a photo of the one I have, but I didn't realize that ones like mine had a square final exit pipe too. Guess that's one of the fun things about the PT..... the ol' box o' chocolates from Forrest Gump.

Phil

Phils · Feb 7, 2005

Just an update. Finally tried out my new MIG welder this weekend and attached the SuperTrap permanently to the PT exhaust. When reassembling the SuperTrap I used the recommended discs (seven instead of the previously installed nine) and it quieted the little machine even more! No problem with power that I could notice.

Phil

stray · Feb 7, 2005

Good deal. Does it still look like the first pic you posted? I'll bet that mig welder is NICE! I am still sticking and beating flux.

egb6550 · Feb 7, 2005

That looks like a great modification pardon my ignorance but what is a MIG welder?

Phils · Feb 7, 2005

I don't know what MIG means, but it's a welder that feeds the wire directly to the weld and doesn't use flux, but uses a mixture of argon and carbon dioxide to keep the weld clean. No slag. Nice weld even if the welder is less than skilled (like me). Yes, it looks like it did with the hose clamp, only no clamp.

Phil

Charlie_Iliff · Feb 7, 2005

what MIG means 

metal inert gas

MuncyBob · Feb 8, 2005

Thanks for the update!...I'll be ordering mine soon since spring is right around the corner(I hoipe!) and windows will be open more often.

egb6550 · Feb 8, 2005

I looked at my 422 exhaust last nite and the pipe out doesn't look wider that 2" more like 1 1/2" how do you get the 3" to fit? Do you use other fittings as well?

Phils · Feb 8, 2005

The OD of the pipe that exits the bottom of the PT muffler on MINE is 1 and 1/4". The Supertrap comes with that ID on the inlet and is the one I used (other IDs are available). The outside diameter of the whole Supertrap is 3". There is a 5" model that won't fit on a PT without some major modification (more than I'd like to do). I can take some more photos if it would help.

Phil

egb6550 · Feb 8, 2005

Thanks, I ordered mine you should be getting your commission from Jack's soon..

egb6550 · Feb 22, 2005

Phils, can I borrow yours?.. they are backorderd until 3/24/05.. I could be deaf by then. Oh I just remembered you welded yours on.. never mind.

RegL · Feb 22, 2005

Was wondering if any of you diesel guys have tried any different mufflers than the stock PT one. I sure would like to quiet down the 2cyl on the 1430.