[Healeys] Non Healey Question...Blower Bentley

Patrick & Caroline Quinn p_cquinn at tpg.com.au
Sun Feb 19 17:18:44 MST 2017

Hello Mike


I heard that it was a good event.


As you say the twin SU carburettors are hanging off the front mounted blower and those things are two blow-off valves that protect the supercharger from the effects of backfiring.


Hoo Roo


Patrick Quinn

Blue Mountains, Australia


From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Michael Salter
Sent: Monday, 20 February 2017 10:10 AM
To: healeys at autox.team.net
Subject: [Healeys] Non Healey Question...Blower Bentley


​I was at the Ellerslie Intermarque Concours ​in Auckland last weekend and had the opportunity to take a close look at a "1931 Blower Bentley".

There is a part of the engine that I cannot figure out and was wondering if anyone on the list who can shed some light on this.
Inline image 1

Where the carburetors would be mounted on a non supercharged engine there are these very complicated devices.
Inline image 2

I would guess that they are some sort of relief valve but, as the carbs are on the blower inlet I don't think that is very likely.

Anyone know?

Michael S

BN1 #174


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