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Re: [Healeys] Overdrive query

To: simon.lachlan@alexarevel.plus.com, 'Healeys' <healeys@autox.team.net>
Subject: Re: [Healeys] Overdrive query
From: Bob Haskell via Healeys <healeys@autox.team.net>
Date: Wed, 28 Jul 2021 18:47:10 -0400
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <000001d783f9$f290f300$d7b2d900$@alexarevel.plus.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0
Simon,

The handwritten dimension on page 4, illustration 6.9 is 0.125" -> 
0.219".  It's 0.125" plus 3/32" as mention in the text.

I don't have a loose piston.  For the washers to install in the piston, 
the inside diameter ought to be smaller than the spring and the outside 
diameter a bit smaller than the piston's inside diameter.  Might have to 
chamfer the OD to match the piston.

Cheers,

Bob Haskell
Austin Healey 3000 BN7/BT7 registrar

On 7/28/21 5:45 PM, Simon Lachlan via Healeys wrote:
>
> Hi,
>
> Attached is Del Border?s excellent work on, you guessed it, the 
> overdrive. Doubtless, you?ve all got a copy.
>
> Page 4, illustration 6.9. Can anyone tell me what the second 
> handwritten figure is? ie, ?Increase this dimension from 0.125? to ??????.
>
> And?..Page 5, paragraph starting, ?Now to get the pressure?? Does 
> anyone have the precise dimensions of these washers? ie 1/16? thick by 
> ????? wide?
>
> Lastly, has anyone tried these two mods?
>
> Page 6?s work the springs is interesting but OTT for my purposes!
>
> Thanks,
>
> Simon
>
>
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