06-12-2019, 03:37 AM | #1 |
Gone Wild
Join Date: Dec 2010
Location: Southern Ontario
Posts: 533
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Clone carbs
I'm about done with cheap chinese carbs. I can't believe how quirky they are especially for start ups. There are cars driving themselves around these days but manufacturing a small engine that starts and runs good every time is still a problem? I know it's not that simple but I'm too annoyed right now to be realistic. Anyway.. I'm looking for an upgrade. Any suggestions? I need something for this 13 HP clone engine.
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06-13-2019, 12:18 PM | #2 |
Not Yet Wild
Join Date: Jul 2016
Posts: 66
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Re: Clone carbs
I recently installed an adjustable main jet kit. It made all the difference for the better. Now I can fine tune the main jet by turning a thumb screw. Along with an adjustable low speed needle screw, you should be able to fine tune the carb exactly how you need. EC Carburetors sells the kit, but I think others do too. I’d like the item but I don’t know if it’d violate the forum rules.
You should really have a choke if you already don’t. It’ll guarantee easy starting no matter the temperature. You’ll need a GX390 remote choke bracket and a generic choke cable. It surprises me how many people here don’t have a choke installed. For a total of $40, you can have a remote choke and never have to worry about starting issues again, even if it’s below freezing. |
06-13-2019, 01:42 PM | #3 | |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: Clone carbs
Quote:
The folks who run a starter/generator - some don't run a choke of any kind. The starter/generator turns the engine over faster and longer then an electric starter can. Starter/generator turns the engine 6-800 rpm till the engine starts. An electric starter needs all the help it can get, so a choke is necessary. This is my carb on a VC460 powered cyclecar. Fully adjustable by hand. |
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06-13-2019, 08:45 PM | #4 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,644
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Re: Clone carbs
Just to add to what Shepard said. I am one of those guys using a S/G for starting. There is a BIG power difference with the carb throat cleaned up and no choke. A hot rodded clone likes to be on the rich side and my starts even in cold weather. BUT my snowmobile cart with a electric started needs a choke any time from a cold start. And which ever way you do it the better flowing your air cleaner set up is the more power you make.
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06-13-2019, 10:46 PM | #5 |
Gone Wild
Join Date: Jun 2011
Location: Kingston Springs Tn.
Posts: 874
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Re: Clone carbs
Are there any threads on here about how many d the throat of the bored carb (without ruining it lol )
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06-13-2019, 10:46 PM | #6 |
Gone Wild
Join Date: Jun 2011
Location: Kingston Springs Tn.
Posts: 874
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Re: Clone carbs
Supposed to say mod the throat
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06-14-2019, 06:36 AM | #7 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,644
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Re: Clone carbs
In my case I used the VC billet intake manifold as my air cleaner mount. I then bolted it to the carb throat and marked areas that didn't match.Then carefully blended those edges for something like a port match. I was very careful in the floor area and around the brass orifices on the sides. More aggressive on the roof where the choke shaft had come thru.The top hole I threaded and red loc tited a large head machine screw. On pg 13 of my Vc 460 build shows my whole set up with the VC manifold and the oval K&N with my Ray produced UNI filter sock.It JUST fits in my G14.
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06-14-2019, 08:19 AM | #8 |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: Clone carbs
I opened up this carburetor's throat, I tried to keep it uniform and that was my problem. I removed to much material behind the bottom choke shaft hole and the venturi radius. That was where my leak came from. I had buffed to much the fuel passage to the float needle. The brass air bleed jets can be drove in deeper with a punch that has a flat bottom. I'm going to try again when I finish some of my other projects. Miles to go before I sleep ---
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06-14-2019, 08:43 AM | #9 |
Gone Wild
Join Date: Jun 2011
Location: Kingston Springs Tn.
Posts: 874
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Re: Clone carbs
Can any more be taken out of the throat where it’s bored ?
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06-14-2019, 09:20 PM | #10 |
Not Yet Wild
Join Date: Jul 2016
Posts: 66
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Re: Clone carbs
Shepard is the resident carb expert here so following his advice will get you what you need.
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