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Dave H 
Orange Level
Joined: 11 Sep 2009
Location: Central IL
Points: 3576
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 Topic: Straight Pipe
Posted: 02 Mar 2016 at 1:10pm |
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I am going to straight pipe my D 15 II with a double wall that turns 90 degrees at the top. This is not a working tractor and will only be on one tractor ride a year and maybe push a little show.
Anyhow I cannot get a grip on what size outlet would look appropriate. The most readily available one I see is 3 inch, but i think it would look scrawny.
What size do you folks that have eyeballed them installed looked appropriate?
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jaybmiller
Orange Level Access
Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24572
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Posted: 02 Mar 2016 at 2:38pm |
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Since you're the one that'll have to look at it and ride it once a year, you should spend some time and mockup a few 'mufflers' from say 1 1/2, 3" and 4" ABS pipe and a few adapters. Dry fit, then when 'happy', spray with silver rattle can. Walk around it, take a few pictures....go back into house..put pix on PC and look again.
Jay
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Brian-KS
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Joined: 27 Aug 2014
Location: Kansas
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Posted: 02 Mar 2016 at 3:17pm |
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My guess is a 3" would look pretty beefy on a D15.
I think my 190 came from the factory with a 3" pipe.
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EAT BEEF!
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7482
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Posted: 02 Mar 2016 at 9:12pm |
 Brian-KS wrote:
My guess is a 3" would look pretty beefy on a D15.
I think my 190 came from the factory with a 3" pipe.
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My thoughts exactly. Any thing bigger than 3" would be alright on a 190, but on a little D15? 3" would be more than enough I think. With no muffling ability, that straight pipe is really going to make that tractor snort on a ride or parade!
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'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
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Dave H
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Joined: 11 Sep 2009
Location: Central IL
Points: 3576
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Posted: 03 Mar 2016 at 7:33am |
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thanks for the input guys, I am going with a 3 inch.
I don't know about the sound on the double walls. I just been slipping a pipe on the manifold for the initial run up and test ride. It was well within the bearable range for me, not pulling of course.
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desertjoe
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Joined: 23 Sep 2013
Location: New mexico
Points: 13688
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Posted: 03 Mar 2016 at 8:41am |
Yep,,,3" will look nice and,,,,I know it's gonna sound "raspy,snarly and get out the way",,,Tough,,,,!!! Just call it " The Straight Pipes Special",,,,, 
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PaulB
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
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Posted: 03 Mar 2016 at 2:07pm |
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The guy at the back of the line will probably be looking for earmuffs by the end of the ride. Why not just put the correct muffler on it so everyone can enjoy a nice ride through the without having their ears ringing after a couple hour ride?
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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SHAMELESS
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Joined: 13 Sep 2009
Location: EAST NE
Points: 29486
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Posted: 03 Mar 2016 at 2:08pm |
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can point the slant to the front!
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SteveC(NS)
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Joined: 12 Oct 2009
Location: Nova Scotia
Points: 663
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Posted: 04 Mar 2016 at 6:36am |
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I guess you're not concerned with efficiency or power, but no back pressure (free flow) will decrease the engine efficiency.
At least it did on my B.
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