Straight pipe exhaust
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=147212
Printed Date: 04 Jul 2024 at 11:54am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Straight pipe exhaust
Posted By: jerbob
Subject: Straight pipe exhaust
Date Posted: 05 Feb 2018 at 8:20am
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Howdy forum friends. A an insignificant question. Upon inspection of my exhaust system, I found the original muffler has s spit in it. My tractor is a HD16DC. Has anyone run just a straight exhaust pipe without a muffler? Not sure I would find a replacement unit. Bet it's loud but I use hearing protection regardless. |
Replies:
Posted By: CAL(KS)
Date Posted: 05 Feb 2018 at 9:00am
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Im guessing it would be awful loud. I would try to repair yours by welding or you could fabricate something without too much trouble. A large section of round pipe with inlet and outlet welded on and some kind of smaller perforated pipe down the center. It would probably make a big difference in sound and pretty simple but up to you.
or put on a turbo and straight pipe... lol
------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: Coke-in-MN
Date Posted: 05 Feb 2018 at 9:26am
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Depends on IF some back pressure is needed for proper performance of engine - On my little 2-71 on HD5G - I made my own ehaust as muffler rotted out and the Oval muffler that was stock bolted directly to head - I used 4" round tube welded to plate to attach to engine - then welded a 2 1/2" outlet to that and extended through hood - attached a IH tractor muffler to that - did remove baffel from muffler though for better flow . ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: DMiller
Date Posted: 05 Feb 2018 at 10:49am
| My 7G 344 is a straight pipe on a turbo. I HAVE to use ear protection on it. I am going to do some exhaust rehab on it come spring. |
Posted By: Tad Wicks
Date Posted: 05 Feb 2018 at 10:52am
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Is that a turbocharged engine? Here in the "land of fruits and nuts" and I am not talking about tree products, where the loonies are ,with out a doubt, running the asylum , a spark arrestor is required on just about anything off highway unless it has a turbo. If there is a fire where you are working, it doesn't matter what started it, and your piece of equipment does not have a legal spark arrestor, you will be cited and stuck with all suppression costs associated with that fire. Can you imagine the operating costs on a Sikorsky Sky Crane (about 30K/hr) and a DC 10 and all the dozers, firetrucks and alllllll the little yellow jacketed minions that hooked themselves to a State nipple, that do nothing but watch the airplanes. Long story short, a spark arrestor will quite down an engine considerably. Tad |
Posted By: jerbob
Date Posted: 05 Feb 2018 at 12:36pm
No my tractor is not a turbo unit. My bobcat is however and that does have a spark arrestor on it by design. Thank you |
Tad Wicks wrote:Posted By: jerbob
Date Posted: 05 Feb 2018 at 12:37pm
The split is easy to get at and I will likely put a bead on it to seal it back up. I was mainly curious as to if anyone was using just a straight pipe deliberately. As loud as my old girl is, I cannot imagine her with out a muffler. Thank you for the opinion Cal. |
Posted By: jerbob
Date Posted: 05 Feb 2018 at 12:39pm
I never considered on the back pressure thing but would make sense. No way to verify that however and as I mentioned to Cal, the split is easy to get at and I will just put a bead on it to seal it up. Nothing that a wire brush and some Black stove pipe paint to make it look good as new. Thank you Coke. |
Posted By: jerbob
Date Posted: 05 Feb 2018 at 12:41pm
I like the exhaust tone of my 16 but she barks pretty loud with the muffler even with a split. No turbo on her either. I heard the 16000 engine did not respond well to a turbo added on. No intent to do so either. Thank you D. |
Posted By: Ian Beale
Date Posted: 05 Feb 2018 at 4:14pm
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If you find that the metal is thinned out where it is split think about making a wrap around that goes over the outside of the muffler and welding that on. You get more metal to weld to on the seams. I rebuilt the one on our AC Forty Five that way. Panel beat the basic shape (round in this case - would be easier if I'd had a roller) out of about 2 mm sheet, clamped it down over the original, trimmed and welded it in place. Even beat out a a new domed top cover. There was room in the bonnet hole for it without modification. YMMV |
Posted By: jerbob
Date Posted: 05 Feb 2018 at 5:47pm
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That would be a good approach and will see if feasible. My split is on the top do I am figuring a way for a heavy or thicker gauge cap piece and come down the sides. Thank you Ian |
Posted By: Lazyts
Date Posted: 06 Feb 2018 at 12:52pm
| The muffler on my project 11-B is totally rotted out, not sure what to do for a replacement. Most if not all turbocharged AC construction equipment ran a straight pipe from 1964 on, but they started adding mufflers in the mid seventies, right after the merger. I could just eliminate the muffler and add a straight pipe (most have had this conversion by now), but I really don't want to cut another hole in the hood... |
Posted By: shameless dude
Date Posted: 06 Feb 2018 at 1:35pm
| I had a curved straight pipe on my HD5 D, it wasn't very loud, I placed the curve outlet towards the front. |
Posted By: CAL(KS)
Date Posted: 06 Feb 2018 at 1:42pm
chrome turnout stack on top of muffler is the way to go.   ------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: jerbob
Date Posted: 06 Feb 2018 at 3:39pm
I am leaning towards the turn out slash cut chrome pipe when painted. I have a straight pipe off the muffler that has the rain cap on it. I took it off and cleaned it and painted it flat black and it is an improvement. With a fresh paint job, I like the look of yeller with black accents. Hard to beat chrome though Cal. |
Posted By: jerbob
Date Posted: 06 Feb 2018 at 3:42pm
A question for ya Lazyts. Would a turbo reduce the sound more than a non turbo unit. with both using no muffler, which would be louder? Turbo no muffler or non turbo no muffler? Im going to take the muffler off for repair and will see the difference myself but was curious how a turbo would affect the exhaust note. Thank you for joining in on my trivial topic. Is it possible Chrome makes every thing alright? |
Posted By: jerbob
Date Posted: 06 Feb 2018 at 3:53pm
Thank you shameless. I lost the muffler on my Oliver 1855 tractor. It is a 1972. Put a great straight slash cut chrome pipe on it and love the sound. My Oliver has the 98 HP Waukesha diesel engine in it. It sounds awesome moving what that straight pipe on it. Yes its chrome! |
Posted By: DMiller
Date Posted: 06 Feb 2018 at 7:14pm
| Turbo diffuses the exhaust enough to muffle some. In heavy trucks USED to be if turbo charged could have straight pipes as the turbo qualified as a 'Muffling Device' |
Posted By: lowell66dart
Date Posted: 06 Feb 2018 at 7:34pm
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If you look on the Summit Racing or Jegs websites you can find short bullet type mufflers/glasspacks. I bought one for a 7060 and added muffler pipe with the same od as the muffler. A little welding, grinding and paint and it works well. I think I had $70 in it. ------------- AC 6080 (8030,7060,200,175,D-17HC, 6040,160,6140 all gone) Farmall 1066 & 656 Hi-Clear (for sale), White 2-62 High Clearance, JD 4255 Hi Clear. |
Posted By: DiyDave
Date Posted: 06 Feb 2018 at 8:44pm
Always liked the straight pipe, on the old D-19...
[TUBE]MLCGNyBtOls[/TUBE]
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Posted By: Ian Beale
Date Posted: 06 Feb 2018 at 10:09pm
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When we got our new-to-us FA 10 dozer (and before the books arrived) I wasn't sure who made what on it. Except for the muffler, reasoning that only Italians would have used a baked enamel muffler |
Posted By: jerbob
Date Posted: 07 Feb 2018 at 6:14am
Now that's interesting DMiller. I did not know that. Good to know. |
Posted By: Morten.have
Date Posted: 07 Feb 2018 at 6:27am
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Jerry if you want to pay the shipping. I will give you my original muffler. I’m going to remove it this weekend. Because I will make a self hanging exhaust system to release the pressure on the manifold. I can send the 3 light set up to ;) |
Posted By: jerbob
Date Posted: 07 Feb 2018 at 10:39am
Hey Morten,,, wondered where you have been and if you are OK. I will PM you on this. I took off the muffler and its pretty fixable so I am going to go that route. How is the weather over there right now. Here in Michigan which is called the Great Lake State, its around 14 degrees F with snow almost daily this past week and into this weekend. How have you made out with your exhaust manifold repair'/replacement. I have tried but cannot find one anywhere here in the states. I have a large Cat Dealer and Repair house call AIS and they have a posting board for parts selling and folks looking with your needed manifold listed. Hoping they can come up with a solution |
Posted By: Morten.have
Date Posted: 07 Feb 2018 at 3:24pm
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I have bin working my Ass off lately, mostly for Cat and a bit with my Cat digger. In the meanwhile Joel have send a manifold overseas that should be fixable. It have received to Denmark, but the tax system has taken the lead and they are ripping me for money Big time!! Today I’m started to prepare the dozer for the manifold but that didn’t turn out well because I snapped 5 studs so tomorrow’s I’m gonna get the drill skills testet. The weather here is damm cold but it’s only -2 C no snow but it’s storming and the air is thin. Over here they give all the roads salt 4-6 times a day so there is salt everywhere by now It’s make a big rust problem, and a lot of washer fluid ;) |
Posted By: jerbob
Date Posted: 07 Feb 2018 at 5:33pm
That exhaust manifold is fighting you every step of the way. We use a lot of salt in Michigan and not uncommon to see salt trucks out 2 to 3 times per day. When it's under 10 degrees Fahrenheit our salt does not work and they plow and drop sand. They call our area the Rust Belt for a reason. |