Straight pipe 7040?
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=134529
Printed Date: 29 Sep 2024 at 12:30am
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Topic: Straight pipe 7040?
Posted By: nick121
Subject: Straight pipe 7040?
Date Posted: 01 Feb 2017 at 8:50am
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Hey guys, Just curious if anyone here runs a straight pipe on a 7000 series with the 426? Is it a lot louder? I want to hear a bit more turbo whistle and wouldn't mind it being a bit louder, As long as it isn't unbearable. Would there be any issues with a straight piped 7040.. would I lose any power or harm the engine? Thanks,
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Replies:
Posted By: Lonn
Date Posted: 01 Feb 2017 at 9:03am
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It's not too bad on my brother's 7030. Just a little louder. The muffler will go back on sometime soon. Just used a straight pipe until the new engine was broken in. I'm a muffler fan and value my hearing. Even a little louder is still louder. ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
Posted By: Tbone95
Date Posted: 01 Feb 2017 at 9:22am
| I love the sound of an awesome running straight piped diesel.....for about 5 minutes from a distance on somebody else's tractor and farm. I'd never want to do that to my ears continuously. |
Posted By: skateboarder68
Date Posted: 01 Feb 2017 at 9:47am
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Have a straight piped 7045, I think it sounds good but the door and Windows are tight with a new cab kit. Had a D21 fender tractor straight pipe that sounded good but after 5 minutes running her wide open discing I was ready for earmuffs or a muffler. 7045 been that way for 4000 plus hours no harm yet ------------- Orange & Silver still earnin their keep on the farm: R62, Series IV D17 nf, 185, 6080, 6080 fwa, 220, 1968 D21, 7045, DT240. |
Posted By: CALEBnOK
Date Posted: 01 Feb 2017 at 10:14am
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Our d21 has straight 5" loud and can hear it a mile away. I wear plugs but if it was more than a toy we would run a muffler. |
Posted By: Stan R
Date Posted: 01 Feb 2017 at 10:55am
| What? |
Posted By: Dans 7080
Date Posted: 01 Feb 2017 at 11:18am
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I have a 4" on my 7040 and 5" on my 7060 and 7080. I wouldn't have them any other way! I love the sound and in the cabs its not much of a difference. ------------- When someone tells you Nothings Impossible, Tell them to slam a revolving door |
Posted By: DougS
Date Posted: 01 Feb 2017 at 11:56am
Spoken like someone who knows your hearing already goes downhill fast enough as you get older and not wanting to have it go faster. |
Tbone95 wrote:Posted By: Dan73
Date Posted: 01 Feb 2017 at 12:00pm
I have to agree hearing is one of those things you don't notice getting worse till it is too late |
Posted By: CrestonM
Date Posted: 01 Feb 2017 at 12:03pm
I have a friend in his 80s, and he said his wife sometimes complains about is hearing loss. He tells her, "I can't hear as good as I used to, but I can hear pretty darn well for what I've been through!"
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Posted By: 7060
Date Posted: 01 Feb 2017 at 12:09pm
| I have a 3" pipe on my 7060 and had a muffler on my 7050. I couldn't tell any difference inside the cab. I have a 5" on my 7030 and it is a lot deeper tone than the 3". I think the 5" with a cab wouldn't be bad. |
Posted By: darrel in ND
Date Posted: 01 Feb 2017 at 12:16pm
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Huh. ..? What. ..? Could you repeat that please. ...? What's that you say. .? I'm sorry. ..? Yeah, I didn't take such good care of my hearing when I was young, and am paying for it now, but I think it was ruined by far louder noises than a straight pipe on a 7040, Darrel |
Posted By: farmboy520
Date Posted: 01 Feb 2017 at 12:31pm
I have a straight pipe on my 7010 and 7060. I also had one on a 7040. Not much difference in the cab as said before. The 7060 had a real good whistle to it until I had to have the turbo replaced. I love to here a good sounding straight piped diesel. All of them have 3 inch pipe. 
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Posted By: injpumpEd
Date Posted: 01 Feb 2017 at 12:36pm
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A straight pipe is the best thing you can do for a turbo diesel. As long as it has a cab, and you either use a curved pipe, or long enough straight one, the noise level inside the cab should not increase much. Non turbo diesels, ugh! put the muffler on! lol! ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: Tbone95
Date Posted: 01 Feb 2017 at 1:12pm
| The hours per year you need to sit in the seat has a lot to do with it too I would think. Like Lonn said above, just a little bit louder is still louder. When you're exposed to a frequency for a long time, it takes it's toll, and for every decibel louder that frequency is, the more quickly it leaves its mark. I hope to hear my grandkids someday, even after "all I've been through". The high pitched constant whine at work here is enough for me. |
Posted By: johnkc
Date Posted: 01 Feb 2017 at 1:26pm
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I have 3" straight on my 7040 and it is 3" higher than the cab I have had people tell me it sounds good. I always wear hearing protection when running it. I run a 13 ft sidewinder tiller at 2200 rpm. ------------- I support the development of hybrid automobiles and alternative fuels as I need DIESEL fuel for my ALLIS CHALMERS! |
Posted By: jiminnd
Date Posted: 01 Feb 2017 at 2:22pm
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Ran a D21 for a few years, loved the sound but did wear hearing protection. When I was younger I would even open the door on my M2 for a few minutes just to listen to the motor, now that I am older I think I am paying for it. Protect your hearing as much as possible. ------------- 1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner) |
Posted By: TREVMAN
Date Posted: 01 Feb 2017 at 2:23pm
| Ive been using the yellow ear plugs since about 1984. Can still hear the machine, stereo. Wear them in tractor, combine. Take out the "harsh" sounds. I think if you use proper hearing protection you'll be fine. I straight pipe all my engines, have for years. Take care, Trev. |
Posted By: tadams(OH)
Date Posted: 01 Feb 2017 at 2:53pm
| Used to run my brothers Farmall M with a straight pipe now I wear a $6,000.00 pair of hearing aids |
Posted By: hillmonkey
Date Posted: 01 Feb 2017 at 3:15pm
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One vote for leave the muff.If you are going to run a straight pipe with ear plugs you might as well leave the muffler on.Spend the $ on air filter,oil and oil filter,batteries etc. |
Posted By: DrAllis
Date Posted: 01 Feb 2017 at 4:11pm
| Running a straight pipe will usually drop exhaust temps 100 degrees or a little more, which is good for the engine. If you simply remove the mufflers two internal baffles, you can keep the noise level down and drop exhaust temps as well. Use a piece of pipe three feet or so long and 1 1/2" diameter. Set the pipe on the shop floor and slide the muffler down over it. Pound the muffler up and down like a fence post driver until the first baffle is broken loose. Turn muffler over and pound out the other baffle. Result is cooler exhaust temps and pleasant noise levels. I used to do this to many brand new tractors and the Customer never even realized it. |
Posted By: John D
Date Posted: 01 Feb 2017 at 4:59pm
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We have a curved pipe on our 7060, I believe it is louder but not terrible. I'm not a fan of the big hole it leaves in the hood though. http://s131.photobucket.com/user/jd1783/media/IMG_1283_zps3bd5cb1f.jpg.html" rel="nofollow">  ------------- 1964 D17 series 3 |
Posted By: DIESEL
Date Posted: 01 Feb 2017 at 5:18pm
| I put one on my 7010 last year before bailing and I don't think it's any louder than the muffler was. It is about the same height as the cab I don't know if that help's and I like the visibility better. |
Posted By: AC7060IL
Date Posted: 01 Feb 2017 at 5:31pm
Good one. LOL!
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Posted By: HD6GTOM
Date Posted: 01 Feb 2017 at 6:38pm
| I bought a late 200 with factory cab. Came with a straight pipe. Had to run it 7 miles down the road. Went to town and bought a muffler put it on before tractor came home. I hope your cab is good, you will wish it was before the day is over. |
Posted By: Jwmac7060
Date Posted: 01 Feb 2017 at 9:13pm
| Our cranked up 7060 has a three inch chrome pipe with a turn out on it....Lots of whistle and talk when u load her up |
Posted By: DSeries4
Date Posted: 01 Feb 2017 at 9:14pm
Amen to that. The pipe on my 6080 is the same height as the top of the cab. It is not loud inside the cab. On the outside you can hear that thing coming from a mile away at wide open throttle. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: victoryallis
Date Posted: 01 Feb 2017 at 11:32pm
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I have a FW-30 Ford with a VT 903 Cummins it has a straight pipe. Last spring my step cousin was working ground for us. My wife told him call when you cross the highway and I will get you back to your pickup. She was out in the yard when he called she could hear him take off from the stop sign ....... it's 3 miles away. But in the cab I can talk on my cellphone. Point is it might be louder to be around but not louder to operate. But then again Steiger built them like tanks. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: shameless (ne)
Date Posted: 01 Feb 2017 at 11:39pm
| my 7010 and 7080 both have straight pipes, and I don't hear any dif in noise inside the cab, but my old lady.....ooooops....I mean the loving wife says both sound sweet! |
Posted By: GM Guy
Date Posted: 02 Feb 2017 at 1:11am
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I think as long as the pipe exits above the cab roof, there should be no increase in noise in the cab, but I have not proven that idea scientifically. btw, a 7040 with a straightpipe sounds so good. :) ------------- Gleaner: the properly engineered and built combine. If you need parts for your Gleaner, we are parting out A's through L2's, so we may be able to help. |
Posted By: shameless (ne)
Date Posted: 02 Feb 2017 at 2:17am
| my 7010 has a short pipe, only about 1-1/2 ft above the hood and then curves to the side. I did this because I was in near a bunch of low tree branches that like to break pipes off. and it worked well, no extra noise inside the cab, so I left it that way. I can hear a small amount of turbo with it this way...but not bad. the turbo eats a lot of the exhaust noise. |
Posted By: darrel in ND
Date Posted: 02 Feb 2017 at 10:38pm
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Posted By: Carl(NWWI)
Date Posted: 02 Feb 2017 at 11:10pm
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Interesting topic. We put a 4" curved pipe on our 7045, it's awful in the cab, right at pto rpm it has a terrible low tuned hum in the cab, almost like you are sitting in a tuning fork. I've never figured out why. Sure sounds nice on the outside! But you won't last long inside! We put the muffler back on, kinda bummed about it. Doesn't make any sense. |
Posted By: shameless (ne)
Date Posted: 03 Feb 2017 at 2:46am
| did you try curving the pie to the front? also put your foam blocks back in under the dash, that will help a lot. |
Posted By: Carl(NWWI)
Date Posted: 03 Feb 2017 at 5:31pm
| The dash is full of foam, and I did try pointing the pipe different ways, didn't make a difference. It's a wierd one. Lol |
Posted By: DougS
Date Posted: 03 Feb 2017 at 6:00pm
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The cab is resonate at that engine RPM. Apparently there is a low frequency sound component in the exhaust note. I doubt foam will help. Try changing the length of the exhaust pipe |
Posted By: Dans 7080
Date Posted: 03 Feb 2017 at 8:54pm
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Carl, go with a 3" or 5" pipe it will cut down on the resonance of the engine. I have a 5" on my 7060 and at about 1600rpm it does the same thing. Speed it up or slow it down and it quits. The 5" is great at pto speed. It is a curved pipe facing to the right as I'm in the seat. ------------- When someone tells you Nothings Impossible, Tell them to slam a revolving door |
Posted By: Carl(NWWI)
Date Posted: 03 Feb 2017 at 10:24pm
| OK, would be worth a try. I know I tried the 3" off our 1486 and that seemed to cut it down a lot. I did have the curve facing the right. I always bumped it up higher in rpm range, but kinda feel bad making er scream when it does need to be haha |
Posted By: GM Guy
Date Posted: 11 Aug 2018 at 6:16pm
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Hey all, I wanted to drag this thread back up to see where everyone in this thread is buying their straight pipes. Please tell me: Where you got it What size Rough cost and if you are pleased with the quality. I am looking at Shoup, and they want more for a straight pipe than they do a muffler. I am also eyeing a 40 dollar ebay special chromed curved straight pipe that does not look too bad. All of them I am looking at are 3 inch, I was planning on just mounting direct to the elbow. The bigger pipes are intriguing, but IDK how a guy would make those fit. Any input appreciated, Thanks! ------------- Gleaner: the properly engineered and built combine. If you need parts for your Gleaner, we are parting out A's through L2's, so we may be able to help. |
Posted By: OhKen
Date Posted: 11 Aug 2018 at 7:32pm
| My son built a 3" exhaust that exits under the side panel and follows the lines of the cab . No pipe in your view and a little louder in the cab , but ear plugs are a good trade to have an open view over the hood . This is on a Maroon 7060 .Dropped the precleaner below the hood to clean that up too . Has anybody tried putting a spiral/auger section in your straight pipes ? Was told this is a trick truckers do with their straight stacks . |
Posted By: Leon B MO
Date Posted: 11 Aug 2018 at 8:59pm
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I'm 51, and have worn hearing aids for 2 years, thanks to spending my youth on 100 hp open station tractors (190XT with factory straight pipe, 200 with muffler doing tillage work). I also spent a great deal of time inside a sow farrowing house. About 2 of the worst things a young kid can do. I also had a piece of sl*g burn a hole in my ear drum 3 years ago. 70% loss in that ear and 30 in other. Take care of your selves early on. Having said that we have an 8050 with the muffler eliminator and original stack. Listening to the tractor in the seat with door closed sounds no different than our other 8050 or 70. But get 50' away from it while it's working and it sounds deep and strong, like it bellows. Also have 7020 that I put a 3" resonator inside a 3.5" straight pipe to help with visibility and that is no louder than the muffler. Leon B MO ------------- Uncle always said "Fill the back of the shovel and the front will take care of itself". |
Posted By: Leon B MO
Date Posted: 11 Aug 2018 at 9:08pm
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http://www.thomuremanufacturing.com/%20" rel="nofollow - http://www.thomuremanufacturing.com/
Here is where I got the eliminator for the 8050. They have a pretty good selection of pipes. Leon B MO ------------- Uncle always said "Fill the back of the shovel and the front will take care of itself". |
Posted By: DSeries4
Date Posted: 11 Aug 2018 at 9:09pm
I just went to a local muffler shop for the straight pipe on my XT. I brought the turbo elbow and they cut a length of pipe to my request and then flared it to fit nicely over my turbo elbow - 3" pipe. Total cost: $30. Paint it black with high temperature paint and you are good to go. Don't buy anything off e-bay. Support your local businesses. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: AllisFreak MN
Date Posted: 11 Aug 2018 at 9:47pm
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This is a matter of personal opinion, and in my opinion they sound like chit without a muffler. My bro has one with a straight pipe (7010) and while it is true there is not much difference in the cab, there is a big difference if you are 50 feet away. I'd much rather listen to my 7040 with a muffler. Just one man's opinion though. ------------- '49 A-C WD, '51 A-C WD, '63 A-C D17 Series III, 1968 A-C One-Seventy, '82 A-C 6060, '75 A-C 7040, A-C #3 sickle mower, 2 A-C 701 wagons, '78 Gleaner M2 |
Posted By: AC720Man
Date Posted: 12 Aug 2018 at 7:27am
 My brothers XT has muffler, mine has a straight pipe. There is no doubt mine sounds better, especially under load. But his is much easier on the ears. A set of ear plugs still allows me to hear the music of that sweet 301 but you can hear me a half mile away lol. I have had multiple people tell me they love hearing her run in the field but have no idea how I stand it in the seat. 4’ straight pipe with a rain cap. Its personal preference, to each his own. ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: nick121
Date Posted: 13 Aug 2018 at 7:24am
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Hey GM guy, Got my straight pipe at a local exhaust shop. 3 inch plain steel 4 feet long. $20 cad Just clamped it right on the elbow. Sounds nice, but I wear earmuffs if I am in it all day
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Posted By: coggonobrien
Date Posted: 13 Aug 2018 at 9:06am
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