[TR] SU carb fuel bowl

[Andrew Uprichard]

"the gas will drip/run onto your very hot exhaust manifold with dire
consequence" raises an interesting question.  Having just last week cremated
a lawnmower/tractor which had a leaking valve cover gasket, I know that oil
will spontaneously ignite when hot.  But I thought that the same was not
true for gas.  Everyone shudders at the thought of gas dripping on a
manifold, but my understanding was that, unless there was a source of
ignition, the gas would not burn.

Not that gas dripping on a manifold is a good idea.....

Andrew Uprichard

-----Original Message-----
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of Frank Fisher
Sent: Monday, June 04, 2012 11:07 AM
To: wbeech at flash.net; 'Dave'; triumphs at autox.team.net
Subject: Re: [TR] SU carb fuel bowl

i would route the tube as Randall suggested or route them into your air
filter
as originally fitted.
in the event your float bowl overflows the gas will
drip/run onto your very hot exhaust manifold with dire consequence.
Frank
From: "wbeech at flash.net" <wbeech at flash.net>
To: 'Dave' <dave at ranteer.com>;
triumphs at autox.team.net 
Sent: Sunday, June 3, 2012 8:31 PM
Subject: Re: [TR]
SU carb fuel bowl

The vent is also the overflow in the incidence of a stuck
float valve.  I
have 3 sets of SU H6 for the TR3s and they all have the short
piece of fuel
line followed buy a short copper line bent at 90 degrees
pointing down,
presumably to route any spillage.  I recently worked on a
Morgan with the
same SU carbs and there were rubber lines run down to just
below the frame,
much like the radiator overflow, this seems to make more
sense to me.

So I would keep the length of hose on the vent tubes so they can
provide
proper routing of excess petrol but also to prevent airborne
contaminants
from entering the float bowl through the vents, and consider a
longer hose
as extra security from fire.

Hope this helps,
Bill

-----Original
Message-----
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of Dave
Sent: Sunday, June
03, 2012 9:07 PM
To: triumphs at autox.team.net
Subject: [TR] SU carb fuel bowl
on each of the fuel bowls on the su carbs on my 63 TR4 there is a little
vent
tube, which when it arrived had little lengths of hose attached.

seems rather
superfluous to me.  assuming Ibm not concerned about it
looking correct, do I
need to put an inch or two of hose back on or should I
just leave it off. 
what is the point of the short hose?

before picture: 
http://www.ranteer.com/davescars/tr4/DSCN6284.JPG

after picture: 
http://www.ranteer.com/davescars/tr4/DSCN6774.JPG

and yes, I do know that the
fuel line has to connect from one to the other.
Ibm talking about the other,
little vent tube.

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