[TR] Superchargers

[spook01@comcast.net]

Or you can use a Mazda unit like a lot of mg guys.  Kinda fun to adapt, and its modern though it looks vintage.

Sent from my Verizon Wireless Phone

----- Reply message -----
From: "Hdefer" <tr3 at roadrunner.com>
To: "Triumphs List" <triumphs at autox.team.net>
Subject: [TR] Superchargers
Date: Sun, Sep 4, 2011 11:44


Thanks, Randall,

Just the info. I was looking for; makes  me think  twice now! I never intended  it for the TR as, contrary to the 190SL,  I find its power quite adequate, but I would  be very interested in your Judson  project when you get around to it. I have been communicating with Haddon Judson Jr. who highly recommended a George Folchi as being the expert for adapting, rebuilding of, and parts and advise for, vintage Judsons.

See you at the Triumphest?

Hans

On Sep 1, 2011, at 1:08 PM, Randall wrote:

>> Does anybody have recommendations and/or experiences with Judson
>> superchargers? I am actually thinking of picking up a rebuilt one for
>> my 190SL.
>
> Unless being period correct is important to you, I would highly > recommend
> using a Roots-type blower instead, preferably with a "priority > valve".  The
> Judson blower design is considerably less efficient, which means it > both
> sucks more power and heats the intake air more, which in turn makes
> detonation much more likely.  And detonation can literally destroy > the motor
> in a matter of seconds!
>
> The Judson uses phenolic vanes (although perhaps yours will be > rebuilt with
> a more modern plastic) that wear and shed particles directly into > the engine
> intake.  The original TR and MG setup (likely your MB will be > similar) is
> also a "full time" blower, meaning it is always compressing the > intake air
> (and drawing significant power) even when it is not needed (throttle > plates
> are closed).  The modern designs use a "priority valve" to bypass > the blower
> when it is not needed (and some even have a clutch to let the blower > stop
> turning altogether).
>
> Because of the rubbing contact surfaces inside the Judson, it also > requires
> a steady supply of oil through the intake.  Although the original > oilers
> were made by Marvel, the oil should be motor oil, not Marvel Mystery > Oil.
> The oil also tends to promote detonation.
>
> All that said, I do have a TR3 Judson stashed away, that I hope to > be able
> to try out some day.  Most likely I'll also install water injection > and
> boost retard, to control detonation.
>
> PS, the factory MB superchargers are Roots-type, made by Eaton I > believe.
> Some of them include the priority valve right in the blower housing.
>
> -- Randall>
>
> triumphs at autox.team.net
>
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