Fuel System: 164: - Unknown Orifice in Stromberg Carb

Dylan144GT · Sep 15th, 2015, 10:06

Hi All,

I have a question about the Stromberg Carb. The front Stromberg has an orifice on the lower face of the outlet flange; see the pic below, I have circled it in red. I was examining the carbs over the weekend and this particular orifice was blocked with a self tapping screw and glue!?

Can anyone shed some light on what this orifice is there for? One thing to note is that the orifice does not go through to the carb throat and it ejects fuel when not blocked. For obvious reasons, this is a concern as I don't want fuel randomly spurting onto the exhaust manifold...

Thanks for your time.

Dylan

960kg · Sep 15th, 2015, 15:18

Some carbs have alloy plugs in orifices especially fixed jet ones more so that they can be removed to try and unblock the drilled oilways/fuel ways within the casting where maybe they go at right angles. If you did`nt have these plugs then it would not be possible to unblock if they became clogged with sludge etc.

Volvorama · Sep 16th, 2015, 22:53

Could be the position for the vacuum pipe for the distributor.

Sep 15th, 2015, 10:06	#1
Dylan144GT Member Last Online: May 21st, 2023 08:35 Join Date: Aug 2008 Location: Cape Town	Unknown Orifice in Stromberg Carb Hi All, I have a question about the Stromberg Carb. The front Stromberg has an orifice on the lower face of the outlet flange; see the pic below, I have circled it in red. I was examining the carbs over the weekend and this particular orifice was blocked with a self tapping screw and glue!? Can anyone shed some light on what this orifice is there for? One thing to note is that the orifice does not go through to the carb throat and it ejects fuel when not blocked. For obvious reasons, this is a concern as I don't want fuel randomly spurting onto the exhaust manifold... Thanks for your time. Dylan Last edited by Dylan144GT; Sep 15th, 2015 at 10:15. Reason: Subscription

Sep 15th, 2015, 15:18	#2
960kg Premier Member Last Online: Dec 28th, 2022 12:25 Join Date: Jun 2009 Location: Mercville	Some carbs have alloy plugs in orifices especially fixed jet ones more so that they can be removed to try and unblock the drilled oilways/fuel ways within the casting where maybe they go at right angles. If you did`nt have these plugs then it would not be possible to unblock if they became clogged with sludge etc. __________________ Mercedes C320CDI Sport Estate 3 litre V6 7 Gear Auto Remap 290bhp 628Nm torque @ 1600revs 45.1mpg

Sep 16th, 2015, 22:53	#3
Volvorama Too many cats Last Online: Aug 24th, 2023 09:02 Join Date: Aug 2011 Location: Birmingham	Hmm Could be the position for the vacuum pipe for the distributor. __________________ Mark

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