MG
The Classic Marque

Not me but I did walk past the local earlier and they had tables in the car park and maybe a dozen or more people sitting spaced out at various tables.

William is spot on with his calculations

The volume of each cylinder can be calculated by using the formula Pi x R squared x H. R being the radius of the bore and H the stroke
If the std bore is 7.62 cm, then add the 0.1016 cm overbore so the bore is now 7.7216 cm. Divide by 2 to get the radius 3.8608 cm. 3.8608 squared is 14.905.
Multiply by Pi 3.142 x 14.9 = 46.833
Mul...

Just asking.

Cheers - I'm at home :)

SU Berlen (not always the best place to source info and parts) - HIF (click 'Next>>' at bottom of page to continue) -
https://sucarb.co.uk/technical-hif-type-carburetter-dismantling

Bigger carbs but general idea -
https://www.v8register.net/FilesV8WN/SUbookletsAUC9939AHIFtuningandservicing.pdf

Colin - and anyone else.
THIS IS IMPORTANT!

It has just been brought to my attention a detail that I had skipped, and not been aware of. I wasn't clear that there was a distinction between DOT 5 and DOT 5.1. My comments earlier were about DOT 5.1 which is a Glycol based fluid, similar to DOT 4 and DOT 3. Which explains why the bottle says it is compatible and can be mixed.

...

Bruce. Generally speaking, an overflow of fuel can be traced to one of two conditions--the valve or the float. The float can develop a minor hole or crack and fill with fuel resulting in its never rising upwards sufficiently to close the fuel shutoff valve. I have seen this a single time in something over 50 years.

More common is some form of problem with the valve that the float rises...

Bruce, Service and adjustment sheets are available online from the Burlen website, though whether they cover your specific issue I cannot say.

You forgot the image. I can send you the carb manual pages for the HIF44 if you send me an email. Dominic AT clancy DOT ch

I have been running, in my 1959 MGA with stock 1600cc motor, 93 Octane Methanol free fuel.

I suspect about anything would work as these cars weren't very picky. The Methanol concerns me for fear of perhaps loosening deposits. That fear may have no basis in fact.

Nonetheless, it seems to run fabulous and continues to provide immense joy.

Given how finicky some of the new vehi...

HI,

attached is a picture of HIF44 carb. When the fuel pump is on fuel comes up the exposed pipe marked with blue arrow. I assume this an overflow.

I generally understand how these work, but cant find a diagram that shows why this would happen. From what Ive read so far HIF carburetors have a seperate fuel cicuit.

I think this would due to the float chamber. The carb wa...