Weber carb return line

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NORSK
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Weber carb return line

Post by NORSK »

I would like to try to use a return line on a dual weber set up in a vw rabbit.

Anyone have an idea where to find a fuel pressure regulator able to work with that low pressure (approx 3psi)
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SWR
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Post by SWR »

Use an ordinary adjustable Lotus-Malpassi fuel regulator... I guess KRB or some of the other bigger companies over here has them. I used to have one on my turbo GSX-R a decade ago when I ran blow-through stock carbs, set to 3 psi...
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Post by NORSK »

Ok,do you think that regulator can handle the higher flow of a fuel injection pump?

Just trying to get some circulation through the system to cool the gas/carbs down a bit
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Post by SWR »

NORSK wrote:Ok,do you think that regulator can handle the higher flow of a fuel injection pump?

Just trying to get some circulation through the system to cool the gas/carbs down a bit
Sure. I ran a Volvo 240 TIC fuelpump on the bike the first few years, no issues at all. :)
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Post by NORSK »

Supert.

Takk for hjelpen
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Post by MadBill »

Why not just use a restrictor, say 0.030" -0.040", in a return line teed in at or near the carbs? It worked for tens of millions of carbureted V-8s in the 50's through the 80's. The main purpose was reducing vapor lock after a hot soak.
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Post by NORSK »

MadBill wrote:Why not just use a restrictor, say 0.030" -0.040", in a return line teed in at or near the carbs? It worked for tens of millions of carbureted V-8s in the 50's through the 80's. The main purpose was reducing vapor lock after a hot soak.
I planned to run it like a EFI set up with a cooler in the return line.
The carbs are exposed to quite much heat since they are on a counterflow head.
Even if i use header wrap and some heat shields,they still get a little hot.

But yes,for vapor lock your suggestion would be fine i guess.
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