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Anonymous-0

Well-known Member
I want to put a straight pipe on my restored 51 super C when I pull. Does my engine need that back compression that my regular muffler gives? Will it give me more or less power or just a cool sounding tractor.
 
cant say as to the super c specificly, but most factory tractor mufflers are pretty efficient when it comes to flow, most tractors need a little back pressure to help develop torque,if you have ever run a straight piped tractor all day, day after day, it will get to ya lol, up to you, its your tractor and you can build it your way, but if it were mine id put a muffler on it, the factory sound is what us old people like to remember as well as the good simpler times and all that went with it, [ we just chose not to remember the dust, heat, endless days in the field on a open station tractor lol]
 
Make sure and put a 90 degree elbow in it so it points right back at your head!!!! That way YOU get the full benefit of the crappy sound. Those smaller displacement engines don"t have a good rumble it is more a high pitch screech.
You will not gain any horse power either. You might gain if it was a diesel turbo engine. Even then it is not much.

At My local show we put in a rule this year about no tractors over 100 decibels allowed to pull. Had too many guys with those GM diesel come in with straight pipes making too much noise. We got complaints last year from the neighbors. The owner of the grounds told us if we did not quite it down he was not going to rent to us anymore. I don"t blame him we have the show in a nice valley and those loud GMs echoed against the hills and you could not hear anything. My youngest grand kids only stayed a few hours complaining about their ears hurting.
 
(quoted from post at 05:07:03 02/17/11) I want to put a straight pipe on my restored 51 super C when I pull. Does my engine need that back compression that my regular muffler gives? Will it give me more or less power or just a cool sounding tractor.
Click to expand...

I like the sound of a straight pipe on a tractor, but I don't like it all day long.

You can use a muffler, or a straight pipe, or just straight out of the manifold and the tractor really will not perform much differently, if at all. You can even experiment with different diameters of straight pipes, and how far down onto the manifold pipe it fits which will change the sound you get, but unless you are running a highly modified, high revving engine, the exhaust system, or lack, really won't make much difference in winning or losing.

Bottom line. It's your tractor. Do it your way.
 
I have put straight pipes on several tractors over the years.Sounded good,for awhile......In all cases,the pipe was later removed and the muffler reinstalled.In answer to tour question,a straight pipe will not harm or help/increase a thing.
 
Back in the day on saturdays I would hire out to some of the neighbors to drive tractor for them during planting season,big deal for a 10-12 year old. I soon found out who had a pc of corrugated down spout for a exhaust pipe on an old F20 or maybe an F12-14 and was always busy when they came in the yard looking for me to help.I never did like the straight pipes that some prefered. My dad never liked them either,in 1954 when he got his new Super99 Oliver the dealer talked a good talk about the GM diesel and dad sat there listening and when the dealer was done with his speal dad calmly said,"I want the one with the quiet gas engine,and keep the muffler on it "
 
Look closely at your muffler. Many of the mufflers on Farmall tractors are a straight through pipe with holes into an expansion chamber around the middle section. If you can see through the muffler from one end to the other, you won't gain anything except noise by installing a straight pipe. If the muffler has a baffle in the middle to deflect all exhaust gasses into the expansion chamber, you won't gain power with a straight pipe unless your engine has been extensively modified, or you are using a muffler for a smaller-displacement tractor.
 
this may not pertain to old tractors but most newer vehicles require a certain amount of back pressure for engine controlls to function properly, so in some cases some back pressure is a good thing
 
Yes you will gain with the pipe but,you have to put it on a dyno, try different lenghts to see where it works best.The best result might be 3 hp.The noise on a 30 sec pull will be minimal (DO NOT let the nay sayers stop you from having fun and enjoying YOUR tractor).
 
(quoted from post at 19:57:20 02/17/11) this may not pertain to old tractors but most newer vehicles require a certain amount of back pressure for engine controlls to function properly, so in some cases some back pressure is a good thing
Click to expand...

Just what other wisdom did Bubba tell you down at the roadhouse?
 
(quoted from post at 19:05:55 02/17/11) Yes you will gain with the pipe but,you have to put it on a dyno, try different lenghts to see where it works best.The best result might be 3 hp.The noise on a 30 sec pull will be minimal (DO NOT let the nay sayers stop you from having fun and enjoying YOUR tractor).
Click to expand...

3HP????

That's a 15% increase in horsepower for a Super C.

People spend dozens of hours balancing cranks, porting and polishing, swapping heads, valves, rockers, cams, tuning carburetors. All to squeeze 3HP out of a big block V8 engine.

You're telling me you can get 3HP out of a 123 cubic inch, 4-cylinder, 20HP Super C by simply putting a piece of pipe on the exhaust?

Maybe, if you also put a turbocharger in between the pipe and the exhaust manifold, and plumb it into the intake...

Besides, the Stanley mufflers are already straight-through.
 
Read the whole story.You MIGHT see 3 hp.Go back to the woods and keep feeding the ox.Once in a while you might stick your head out of the cave and figure out what others have learned.
 
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