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njnh

United Kingdom
428 Posts
Posted - 23/01/2025 :  10:12:46  Show Profile
If you look carefully, there is a hole in upper surface of the apron in front of the carburettor in both of these well known cars. Is it intended to facilitate "tickling" the carburettor float by inserting an index finger? If not, what is it for?


Nigel H

DK6780

United Kingdom
421 Posts
Posted - 23/01/2025 :  12:06:01  Show Profile
With Kigass why would you need to tickle the float chamber?
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coracle

United Kingdom
2208 Posts
Posted - 23/01/2025 :  14:56:55  Show Profile
"Belt & braces."
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DK6780

United Kingdom
421 Posts
Posted - 23/01/2025 :  15:22:51  Show Profile
In this picture taken when the car was sold in 2019 there's no sign of said hole although it has a later iteration of the cowl. My assumption is that the float chamber is there, but I've never understood why the need to remove the cowl to top up the (small) tank of lubricant for the supercharger (which I'd assume is on the other side of the supercharger).
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njnh

United Kingdom
428 Posts
Posted - 23/01/2025 :  15:59:21  Show Profile
I wonder whether K3001 and J4002 were deliberately not equipped with Ki-Gass for some reason? Perceived fire hazard from the separate fuel tank on the firewall perhaps?

Tim Birkin had a fire during the 500 mile race practice in his Bentley in 1931 which was caused by vapour from the Ki-Gass tank igniting. I have read that George Eyston supplied Tim Birkin with the blower for the 500 mile race, so perhaps Eyston was thinking about Birkin's conflagration? Others more expert in MG history will no doubt be able to correct me.

Nigel H
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DK6780

United Kingdom
421 Posts
Posted - 23/01/2025 :  19:42:45  Show Profile
I didn't think that Kigass had its own supply tank? Some of the other "similar" systems did, but certainly on "standard" Bentley they just draw from the main supply.
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JMH

United Kingdom
935 Posts
Posted - 23/01/2025 :  21:23:35  Show Profile
I've had floats stick from time to time & it certainly helps prevent a big puddle of fuel in the blower casing.
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DK6780

United Kingdom
421 Posts
Posted - 24/01/2025 :  11:40:03  Show Profile
That's given me an alternative thought. On some engines a drain is fitted at the lowest point with a sprung closed actuated arm. Could it be to access that?
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