 Hi pressure to low pressure fuel pump conversion, changing to carbs |
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| brandomc |
 Dec 15 2009, 12:53 PM
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#1
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Member  Group: Members Posts: 113 Joined: 14-May 09 From: los angeles california Member No.: 10,363 Region Association: Southern California  |
Hey everyone, i was wondering what will be required for me to switch to a low pressure fuel pump for carbs. Do i plug off the return line or do i still use it somehow? Anyone have any specific examples of what they did with all of the extra lines after removing their fuel injection system? Thanks
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| SirAndy |
Dec 15 2009, 01:01 PM
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#2
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Resident German Group: Admin Posts: 42,284 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
This will get you started:
http://www.914world.com/bbs2/index.php?showtopic=25954 I recommend using a rotary pump. They're MUCH quieter! I used the CB Performance pump and liked it. As for the return line, you can safely cap it off in the engine compartment. That way, if you ever go back to a setup where it's needed, you don't have to run new lines. However, it is beneficial to run the return, even with carbs. It will require some extra work to set this up, so most people don't do it. Make sure you run the thick FI spacers between the heads and the intake runners to prevent heat soak. As for the wiring, the FI brain and and harness are pretty much one unit. Simply remove those. The rest of the wiring is still needed. Coil, Tach etc. And lastly, if it's a stock engine, i'd rather fix the FI than run carbs ... (IMG:style_emoticons/default/shades.gif) Andy |
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| Shade Tree |
Dec 15 2009, 01:11 PM
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#3
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Member Group: Members Posts: 260 Joined: 18-December 08 From: Springfield, Oregon Member No.: 9,860 Region Association: Pacific Northwest |
QUOTE(SirAndy @ Dec 15 2009, 11:01 AM)  This will get you started: http://www.914world.com/bbs2/index.php?showtopic=25954 I recommend using a rotary pump. They're MUCH quieter! I used the CB Performance pump and liked it. As for the return line, you can safely cap it off in the engine compartment. That way, if you ever go back to a setup where it's needed, you don't have to run new lines. However, it is beneficial to run the return, even with carbs. It will require some extra work to set this up, so most people don't do it. Make sure you run the thick FI spacers between the heads and the intake runners to prevent heat soak. As for the wiring, the FI brain and and harness are pretty much one unit. Simply remove those. The rest of the wiring is still needed. Coil, Tach etc. And lastly, if it's a stock engine, i'd rather fix the FI than run carbs ... (IMG:style_emoticons/default/shades.gif) Andy Not trying to hi jack and maybe this question will help the original poster. Andy, I would like to use the return line on my carb set up just because of the benefit of colder gas circulating instead of hot has sitting. I have a low pressure (3.0 psi) pump. It seems like the best place to insert the return line would be After the second carb. I don't have that type of fitting on the second carb and was considering a tee right before it. I'm worried about losing pressure. If the tee has a smaller outlet to the return than the outlet to the carb, do you think it will work? Suggestions? Thanks. |
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Posts in this topic
brandomc Hi pressure to low pressure fuel pump conversion Dec 15 2009, 12:53 PM
type47 First: Why are you switching to carbs? :stir:
Sec... Dec 15 2009, 12:59 PM shoguneagle I agree with Andy. I think you are creating unnec... Dec 15 2009, 01:14 PM brandomc I bought an engine that is all set up with carbs o... Dec 15 2009, 01:23 PM
type47
I bought an engine that is all set up with carbs ... Dec 15 2009, 03:09 PM Joe Ricard Carbs are OK just different.
No need for return l... Dec 15 2009, 04:03 PM ME733 :popcorn: ...Lots of ideas in this post Brandomc. ... Dec 16 2009, 08:41 AM Cevan
3. you will need a good (metal cannister) fuel f... Dec 16 2009, 12:32 PM ME733
3. you will need a good (metal cannister) fuel ... Dec 16 2009, 06:21 PM kg6dxn You can buy an adjustable regulator with a return ... Dec 16 2009, 06:31 PM neil30076 Using the stock FI pump and a regulator to get the... Dec 16 2009, 06:51 PM r_towle Cevan,
I have a metal filter that is capable of be... Dec 16 2009, 07:19 PM neil30076
Cevan,
I have a metal filter that is capable of b... Dec 16 2009, 08:55 PM |
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