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John Deere Tractors Discussion Forum
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Muffler or straight pipe ?

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5020Chris

11-09-2003 12:47:04




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Is it best to keep factory muffler on turboed engine or replace with straight pipe ? Will the lack of baffles affect exhaust gas flow from the turbo in any way ? Does having straight pipe do any harm to the engine ?
Thanks.




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will

11-11-2003 22:16:45




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 Re: Muffler or straight pipe ? in reply to 5020Chris, 11-09-2003 12:47:04  
I say all turbo-charged engines deserve a strait pipe. It will lower exhaust temps by several degrees, and will certainly help your boost( the turbo will spool up faster) if exhaust can flow more easily through the exhaust chamber of the turbo. Beside the mechanical reasons you just cant beat the sound of a turbo whistling. Wear your ear plugs if it is an open station tractor!!!! Even though it may not seem loud it is the high pitched sounds that you cant hear that really damage your hearing.

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Glen in TX

11-10-2003 15:09:24




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 Re: Muffler or straight pipe ? in reply to 5020Chris, 11-09-2003 12:47:04  
Ran a straight pipe on a 6030 for years with no harm and it runs cooler. Get it long enough to get over cab if you have one and you may want some ear plugs. You can even weld a suction pipe into one to use a aspirator/pre-cleaner set up. Thomure has been making them for years now for different applications and flared to fit the turbo and OEM clamp. Email me for their number. I don't sell them.

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Adam B.

11-09-2003 21:33:47




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 Re: Muffler or straight pipe ? in reply to 5020Chris, 11-09-2003 12:47:04  
If you use a pipe with a curved tip and aim it forward, you will deflect a lot of sound away from yourself vs. a straight-cut pipe. Don't count on a shiny chrome pipe looking nice and shiny for long, especially with a turbo. If you use it much at all, or work it hard once, it'll turn gold, then gold and blue, then finally blue and purple.

Keep in mind, if you haul the tractor you need to tape down your rain cap (if so equipped) or stuff a rag snugly in the pipe to prevent airflow from spinning your turbo while its not being lubricated.

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John

11-09-2003 14:11:20




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 Re: Muffler or straight pipe ? in reply to 5020Chris, 11-09-2003 12:47:04  
No harm to the engine. Yes harm to your hearing



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Terry

11-09-2003 14:01:48




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 Re: Muffler or straight pipe ? in reply to 5020Chris, 11-09-2003 12:47:04  
I live in town. I also have a neighbor who likes to party until the early hours of morning. He has woke me up countless times with his loud cars and music. In the mornings when I trailer my 2-cly, I ALWAYS remove the muffler. The manifold faces his bedroom window. You just can't beat the sound of a Popping Johnny the first thing in the morning!



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Henry J

11-09-2003 13:45:54




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 Re: Muffler or straight pipe ? in reply to 5020Chris, 11-09-2003 12:47:04  
My neighbor has a couple of his tractors straight piped. He said it don't make any noise because of the turbochargers. Anytime He uses them, I can tell because it sounds like someone has constructed a new freight train track through the area.

In reference to HP, I would think that the only way that that stuff could be measured would be on a dyno. I have seen certain applications in other than tractors that guys used to think that the air cleaner off (makes great noises) and bug headers (more great noises) would actually result in less HP but much more diriver satisfaction. Maybe it falls in line with the tires on the highway on a picl up up that you can hear howling 1/2 mile away.

Anyway, I tried a straight pipe on my two cyl, and switched back to the JD muffler. It caused me to say "what" much less.

Have fun, but don't wake the neighbor in the middle of his nap lol.

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old

11-09-2003 12:53:51




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 Re: Muffler or straight pipe ? in reply to 5020Chris, 11-09-2003 12:47:04  
As long as the pipe is long enough it doesn't hurtto stright pipe it, adds just a little more Hp that way hope this helps



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buickanddeere

11-10-2003 19:29:37




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 Re: Re: Muffler or straight pipe ? in reply to old, 11-09-2003 12:53:51  
If the origional mufflered diesel engine is overfueled-currently running rich. Tahn moving more air through the engine should add power/efficiency. If the mufflered engine puts some unused oxygen up the stack , than extra airflow will add no HP.



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