[Fot] TR4 axle shafts

[Tony Drews]

That makes more sense.  By the way, in the US there is a similar rule 
about rear axles - but it wasn't strictly enforced.  Anyway, all of 
the US sanctioning bodies accept the modification I describe as a 
safety improvement that does NOT violate the rules.  It might be 
interesting to ask your governing body for an exemption - this is not 
a performance improvement, just a safety improvement.

Also, tracks with long sweeping corners (like the "carousel" at Road 
America) are particularly hard on the stock design.

What you are describing, if properly engineered, sounds like a good solution.

Cheers, Tony Drews

At 01:44 AM 1/20/2014, MadMarx wrote:
>Scott and all the others responded,
>
>
>
>I never intended to find an alternative to the Southwick conversion. The
>reason is a different one.
>
>
>
>Our rules say: Strengthened axle shafts are allowed but no word about doing
>any changes to the axle housing.
>
>As I understand the rules the stock housing has to remain stock.
>
>
>
>I had on my wish list:
>
>
>
>1.    Make it safe
>
>2.    Keep it within the rules
>
>3.    Keep it interchangeable with the stock system
>
>
>
>I own a Porsche 911 and this car has a TR2 like axle spline on which the hub
>is pushed on.
>
>No woodruff key, not press needed to remove. Quite simple thing.
>
>The TR2 has the same idea but not well engineered. So I thought I could use
>the TR2 shaft as a basic pattern and remove all the wrong stuff to make it
>last as good as the Porsche shaft does.
>
>
>
>The good thing would be if I hit a concrete wall and bend the shaft, I can
>part out any TR4 road car for a spare axle on the track parking lot to make
>the car going again.
>
>
>
>Racing in Europe is quite strict with rules and also competitors might
>protest you out of competition if the car is not bullet proof according to
>the rules.
>
>
>
>Sorry to rise concerns.
>
>
>
>Cheers
>
>Chris
>
>
>
>
>
>Von: Scott Janzen [mailto:sjanzen at me.com]
>Gesendet: Montag, 20. Januar 2014 03:28
>An: Tony Drews
>Cc: MadMarx; fot at autox.team.net
>Betreff: Re: [Fot] TR4 axle shafts
>
>
>
>I know of at least one TR racer that has just gotten the modified axles from
>Southwick, and had a local machine shop do the axle housing modifications.
>This would avoid the need to ship the whole axle assembly.  Not sure what
>sort of jig is needed to get the housing ends in the correct position for
>welding - perhaps the axles themselves?
>
>The axles are available from a number of circle-track aftermarket suppliers
>- quite possible they could be modified locally as well, and a quick search
>indicates they are about $300/pair. If they have to be bought from the US
>anyway you might as well have Southwick do it and send them to you.  They
>might be able to supply the axle housing ends as well.
>
>
>
>Southwick Machine
>
>Coal Valley, Illinois
>
>Robert Southwick
>
>robsouthwick at gmail.com
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