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Gizzmo57 Samba Member
Joined: March 23, 2024 Posts: 3 Location: Ohio
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Posted: Sat Mar 23, 2024 5:30 am Post subject: Fuel injected to carburetor swap |
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I’ve been working to restore a 78 type two Bus the gentleman working on my motor sadly passed he had the motor done except for intake and exhaust when I look up a 78 2 L engine I get fuel and injected wiring. Can anybody tell me where I can find 2 L wiring that is carbureted Also, what size fuel pump and do I need voltage regulator?thanks
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Wildthings Samba Member

Joined: March 13, 2005 Posts: 52722
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Posted: Sat Mar 23, 2024 9:01 am Post subject: Re: Fuel injected to carburetor swap |
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The wiring harness for a single carb is just a few wires and easy enough to build. You need power to the coil (which should still be there) and then power to the fuel pump and coil heater, which are best done with a FI relay with a built in timer to cut power if the engine isn't running. I just use a low pressure (<4psi) Airtex marine pump while many use low pressure rotary pumps.
If you find you need to rejet the carb to get it to run well, I would start by disabling the power valve as that can make the carb and engine vacuum signal match better.
It can take a bit of work to get a progressive carb to work well on these engines as there is no manifold heat or preheated intake air for the carb. You should just keep a lookout for a decent looking fuel injection including the fuel pump. |
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aeromech Samba Member

Joined: January 24, 2006 Posts: 17753 Location: San Diego, California
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Posted: Sat Mar 23, 2024 9:32 am Post subject: Re: Fuel injected to carburetor swap |
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I’ve never seen an air cleaner like that in a bus. _________________ Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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Wildthings Samba Member

Joined: March 13, 2005 Posts: 52722
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Posted: Sat Mar 23, 2024 12:31 pm Post subject: Re: Fuel injected to carburetor swap |
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| aeromech wrote: |
| I’ve never seen an air cleaner like that in a bus. |
It's not as good of a choice as one with a inlet horn as the horn makes it easier to feed warm air into the carb. Do know how the one shown fits onto the progressive carb either. |
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Gizzmo57 Samba Member
Joined: March 23, 2024 Posts: 3 Location: Ohio
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Posted: Sun Mar 24, 2024 12:51 am Post subject: Re: Fuel injected to carburetor swap |
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| Thanks for your input. I just set the air filter on there more or less just to keep things from going into the carburetor. I’m not sure what kind of air filter should be on there. I guess my big question is hooking up the alternator with a voltage regulator a good wiring diagram would be helpful thanks for your help |
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crownline Samba Member

Joined: September 10, 2010 Posts: 613 Location: Northwoods of WI
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Posted: Sun Mar 24, 2024 4:45 am Post subject: Re: Fuel injected to carburetor swap |
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That center section should be turned around so the brake booster hose faces front ie: towards the flywheel. Also see if you can get some cooling flaps from busted bus or one of the other scrappers.
A Bentley Manual will have all the wiring diagrams you need and shows cooling flaps and associated parts. _________________ 1972 Bus 1700 cc Single Carb. But not a progressive.
Barelymuvin
Wish I still had the ones I got rid of.
"It"s got some dings and dents and neither of us is going to SEMA."(Update, I went to SEMA in 2019 but the Bus stayed home)
[url=http://www.vw-mplate.com/mplate-8446.png]Click to view image[/URL] |
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busdaddy Samba Member

Joined: February 12, 2004 Posts: 53210 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Sun Mar 24, 2024 7:57 am Post subject: Re: Fuel injected to carburetor swap |
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Ask the the used parts seller about a carb style breather box cap too, that FI one won't work. _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
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Wildthings Samba Member

Joined: March 13, 2005 Posts: 52722
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Posted: Sun Mar 24, 2024 8:43 am Post subject: Re: Fuel injected to carburetor swap |
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| Gizzmo57 wrote: |
| Thanks for your input. I just set the air filter on there more or less just to keep things from going into the carburetor. I’m not sure what kind of air filter should be on there. I guess my big question is hooking up the alternator with a voltage regulator a good wiring diagram would be helpful thanks for your help |
Not sure what you are trying to do, but you can find wiring diaphragm in the Technical section at the top right of any Samba page. |
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Wildthings Samba Member

Joined: March 13, 2005 Posts: 52722
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Posted: Sun Mar 24, 2024 8:52 am Post subject: Re: Fuel injected to carburetor swap |
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This was my solution, but it took some work to make the adaption. The setup has been somewhat modified since the picture were taken to improve its function.
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Gizzmo57 Samba Member
Joined: March 23, 2024 Posts: 3 Location: Ohio
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Posted: Sun Mar 24, 2024 10:41 am Post subject: Re: Fuel injected to carburetor swap |
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| Thanks guys I didn’t notice the flat missing appreciate all the help. This is my first BW. I’m working on all help appreciated. |
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