PT425

toolz_not_toyz · May 21, 2006

I find the same problem with the exhaust pointing down. At least for the creation of dust storms. Pointing it straight back or angled up would work much better. Instead of modifing the current muffler maybe it might be better just to replace it.

toolz_not_toyz · May 21, 2006

I find the same problem with the exhaust pointing down. At least for the creation of dust storms. Pointing it straight back or angled up would work much better. Instead of modifing the current muffler maybe it might be better just to replace it.

Marks481 · May 21, 2006

I had the same problem with the exhaust... I was wondering where all the brown streaks in the grass were coming from....

I took a 90 degree cast iron 2" (?) elbow and sort of screwed it in place to direct the exhaust backwards, which has stopped that problem.

I really don't like the exhaust arrangement on the PT. The "muffler" just doesn't work very well. Some others on this forum have replaced it with a supertrap, although that is an engineering challenge, since it exits in a 360 degree arc, which can add heat to the engine compartment or burn your tire.

supertrap muffler thread

Marks481 · May 21, 2006

I had the same problem with the exhaust... I was wondering where all the brown streaks in the grass were coming from....

I took a 90 degree cast iron 2" (?) elbow and sort of screwed it in place to direct the exhaust backwards, which has stopped that problem.

I really don't like the exhaust arrangement on the PT. The "muffler" just doesn't work very well. Some others on this forum have replaced it with a supertrap, although that is an engineering challenge, since it exits in a 360 degree arc, which can add heat to the engine compartment or burn your tire.

supertrap muffler thread

Phils · May 22, 2006

First -- my PT came with a heat deflector mounted on the tub just below the exhaust outlet. Don't your units have it?

And an appropiate update:

The SuperTrap is still working great. It's canted somewhat out and to the rear from my experimenting with the vaporlock solutions (moving the entire "fuel system" to the right side of the machine fixed that problem acceptably -- it hasn't died from VL since, but after working hard and long, then shutting down, upon restart I can hear the electric pump has vapor in it, but the PT still starts and runs).

I have added to my 'round tuit' list rewelding the SuperTrap back to the vertical but that's not high on the list as it's working fine now. I used the stock deflector plate behind the Supertrap to help prevent it from being hit when I'm backing around in heavy brush.

If I had a decibal meter it'd be easy to get readings "before" and "after" since all of the SuperTrap comes off with one nut, except the part that's welded to the PT muffler.

I have a Fluke multimeter (88 comes to mind but I could be way off as memorizing numbers is not my strong suit). If anybody has an idea on how I can measure decibals with it I'm willing to do it in order to get some definite numbers.

Or if someone has a meter that adapts to a Fluke, or a meter by itself, and wants to lend it to me I promise to return it.

Phil

Phils · May 22, 2006

First -- my PT came with a heat deflector mounted on the tub just below the exhaust outlet. Don't your units have it?

And an appropiate update:

The SuperTrap is still working great. It's canted somewhat out and to the rear from my experimenting with the vaporlock solutions (moving the entire "fuel system" to the right side of the machine fixed that problem acceptably -- it hasn't died from VL since, but after working hard and long, then shutting down, upon restart I can hear the electric pump has vapor in it, but the PT still starts and runs).

I have added to my 'round tuit' list rewelding the SuperTrap back to the vertical but that's not high on the list as it's working fine now. I used the stock deflector plate behind the Supertrap to help prevent it from being hit when I'm backing around in heavy brush.

If I had a decibal meter it'd be easy to get readings "before" and "after" since all of the SuperTrap comes off with one nut, except the part that's welded to the PT muffler.

I have a Fluke multimeter (88 comes to mind but I could be way off as memorizing numbers is not my strong suit). If anybody has an idea on how I can measure decibals with it I'm willing to do it in order to get some definite numbers.

Or if someone has a meter that adapts to a Fluke, or a meter by itself, and wants to lend it to me I promise to return it.

Phil

toolz_not_toyz · May 22, 2006

(
I really don't like the exhaust arrangement on the PT. The "muffler" just doesn't work very well. Some others on this forum have replaced it with a supertrap, although that is an engineering challenge, since it exits in a 360 degree arc, which can add heat to the engine compartment or burn your tire.)

I think PowerTrac is just trying to cope with finding an engine that fits the specs. I think the exhaust outlet on all of these engines exits at roughly the same place which means PT has to turn the exhaust around. But I would think that the 90" bends in their exhaust pipe isn't going to benefit engine longevity or power production. The whole setup is probably pretty restrictive. What we need here is a decent set of headers! /forums/images/graemlins/grin.gif

toolz_not_toyz · May 22, 2006

(
I really don't like the exhaust arrangement on the PT. The "muffler" just doesn't work very well. Some others on this forum have replaced it with a supertrap, although that is an engineering challenge, since it exits in a 360 degree arc, which can add heat to the engine compartment or burn your tire.)

I think PowerTrac is just trying to cope with finding an engine that fits the specs. I think the exhaust outlet on all of these engines exits at roughly the same place which means PT has to turn the exhaust around. But I would think that the 90" bends in their exhaust pipe isn't going to benefit engine longevity or power production. The whole setup is probably pretty restrictive. What we need here is a decent set of headers! /forums/images/graemlins/grin.gif

KentT · May 22, 2006

(
I think PowerTrac is just trying to cope with finding an engine that fits the specs. )
Too bad they don't fit a really quiet Honda in there... all you'd hear then is the purrrrrrrrrrrrrrrrr and the PT whine.

KentT · May 22, 2006

(
I think PowerTrac is just trying to cope with finding an engine that fits the specs. )
Too bad they don't fit a really quiet Honda in there... all you'd hear then is the purrrrrrrrrrrrrrrrr and the PT whine.