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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm Posts: 1872
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Go Devil 23 Custom Exhaust Build
Built a custom exhaust for my 23 Go Devil Longtail. I see a lot of guys who look for affordable exhausts, so i figured i would share what i did. I cut the stock exhaust off at the manifold (left about an inch of the 1 inch piping off of the manifold). We then welded an inch and a half pipe about 4 inches long onto the manifold that we tapered to inch and 3/4s. we then put the mufflers on (walker exhaust resonators, 12 inch, 2 inch inlet, 2 inch outlet) onto the inch and 3/4 piping and welded it together. After that, we added some 2 inch exhaust tips and bolted it to the frame with two rubberized brackets to reduce vibration noise. The total build cost me about 85 bucks and I had the welding done at Midus in Houma by John, who does excellent fabrication work. The mufflers can be ordered from auto zone for about 16 bucks a piece.
I saw about a 2mph difference in performance and a little more torque when going through thick stuff. We did a GPS on it before and after. Before, we were doing 18-19 with two people and two ice chests. We did the GPS after and were going 20-21. By myself I ran 21 and now run 23. I'm running it on a 1440 ouchita.
Figured you guys would like to see this option if you are on a budget and want something unique that gives you some good little gains and sound.
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Sat Sep 30, 2017 9:49 pm |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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Re: Go Devil 23 Custom Exhaust Build
Cool pipes man. The should flow enough for a small block chevy
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Sun Oct 01, 2017 9:25 am |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm Posts: 1872
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Re: Go Devil 23 Custom Exhaust Build
Hahahahahaha thanks man, I bet they would lol I based the design off the little inboard boats I see running around and figured, if it could work for a small onboard, it should work for a longtail lol
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Sun Oct 01, 2017 12:05 pm |
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CypressCritter
MMT F.E.
Joined: Tue Aug 26, 2014 10:36 am Posts: 822 Location: Jefferson TX
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Re: Go Devil 23 Custom Exhaust Build
Them dirt dobbers will like those!
_________________ SEAARK FX 2472 CC Merc 150HP 4Stroke(CypressCadillac) Uncle J Custom - 19x54 CC Skiff w/40XD GTR
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Tue Oct 03, 2017 7:50 am |
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Bayport
MMT Pro Member
Joined: Mon Jan 26, 2009 12:51 pm Posts: 151
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Re: Go Devil 23 Custom Exhaust Build
Naive question...what does that get you?
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Tue Oct 03, 2017 12:04 pm |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm Posts: 1872
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Re: Go Devil 23 Custom Exhaust Build
That's why that boat cover is clutch lol
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Tue Oct 03, 2017 12:05 pm |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm Posts: 1872
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Re: Go Devil 23 Custom Exhaust Build
What's your question bayport?
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Tue Oct 03, 2017 12:05 pm |
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Bayport
MMT Pro Member
Joined: Mon Jan 26, 2009 12:51 pm Posts: 151
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Re: Go Devil 23 Custom Exhaust Build
What does doing all that result in? Did u have to do it bc of mods to the engine or??? Does the motor run a lot better w those exhausts? Just wondering how much you can get out of a 23. Thx
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Tue Oct 03, 2017 12:12 pm |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm Posts: 1872
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Re: Go Devil 23 Custom Exhaust Build
I originally decided to go with a custom exhaust after my buddy put a voodoo on his GTR. It sounded great and he saw some changes on the top end. I also noticed in my go devil that when I was running wide open, it sounded very restricted, so I decided to do a performance exhaust on it. Once I saw the price of the performance exhausts (400-500 range), I decided to design my own based off of the performance exhausts on in board boats with small engines. I did a little research and decided that, for the price, the above set up would be the best for my boat.
Once we finished it, i immediately noticed a big difference in sound and my little 23 did not sound like it was restricted anymore. We did a gps before and after. Before, our gps with two people and two ice chests was between 18-19. After the exhaust build we were at 20-21. My gps with just me in my boat was 21. By myself after the exhaust, my gps was at 23, which I was very pleased with for a 23 longtail, granted my boat is small (1440), but I was still very happy with those numbers.
All in all, the exhaust was mainly done for a performance aspect as well as for something unique. To me, the 85 dollar total cost for the project is definitely justified by gaining 2mph on the top end and a lot less restriction.
My target is 25 mph by myself in my boat. My next additions are sharpening and cupping the prop, going with a higher flow air filter (possible custom air intake build), and some bigger injectors on my carbs, and then see where I am at on my gps.
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Tue Oct 03, 2017 12:30 pm |
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Bayport
MMT Pro Member
Joined: Mon Jan 26, 2009 12:51 pm Posts: 151
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Re: Go Devil 23 Custom Exhaust Build
Thanks for the details..sounds like you have it pretty well set up
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Tue Oct 03, 2017 12:35 pm |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm Posts: 1872
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Re: Go Devil 23 Custom Exhaust Build
No problem bro, I have the parts details in the original post if you decide to do one yourself or have a friend who wants To make one. In my opinion, it's definitely worth the 85 bucks for the gains, the unique factor, and the good sound.
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Tue Oct 03, 2017 12:48 pm |
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flint87
MMT 1000 Club
Joined: Sun Dec 14, 2014 2:21 pm Posts: 3214
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Re: Go Devil 23 Custom Exhaust Build
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Sat Oct 07, 2017 6:37 am |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm Posts: 1872
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Re: Go Devil 23 Custom Exhaust Build
Can you send me a pic of your intake bro? I would love to see it. Thanks for the info too man.
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Tue Oct 10, 2017 9:40 pm |
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