I don't think these are primarily fuel overflows. I believe that they're
just vapor vents. They're directed towerds the carbs to catch fumes.
Frank Crowe wrote:
>
> Original Message:
> I'm at a loss with the fuel line setup of the new HS6s. There are 2
> tubes on the float chamber lid, obviously one is for the fuel line but
> what is the use of the second tube.
>
> Ken Nuelle replied:
> SU H6 (TR3) carbs are as you describe. The second tube is, I believe, an
> overflow which is normally directed toward the air cleaner. There is
> normally a short (1-1/2" or so) length of rubber tube and then a short
> length of steel tube bent about 80 degrees or so.
> -------------------
>
> I agree, but I've never been sure about the practicality of this
> overflow! It seems to me that if one of my carbs overflow, this fuel is
> not going to be somehow sucked into the air intake, but instead is going
> to drip straight down onto the exhaust manifold and create one hell of a
> fire!
>
> On my TR3 I took two lengths of fuel line and routed this overflow down
> next to the frame rail and below the exhaust to try to get the extra
> fuel as far as possible below and away from the exhaust. (Somehow I
> always like inline engines where the fuel is on one side of the engine
> and the fire is on the other.)
>
> Comments would be appreciated.
>
> Frank
> '59 TR3
> (and 71 BMW 2002, fuel & fire on opposite sides.)
--
George Richardson
The Wyvern - '57 TR3, TS15559L - Now on the road!
http://www.merlingroupinc.com/tr3.htm
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