[Land-speed] Tire Valves

[Dave Dahlgren]

Actually the previous design is mechanically more robust than any pipe 
thread could ever be where is the upgrade. If you doubt my reasoning install 
one of each in an out rim or pieve of steel and atack it it with a hammer or 
any other way that might put a side load on it and see for yourself. If I 
was a tech inspector no way would I pass an 1/8 inch pipe tire valve.
Dave
----- Original Message ----- 
From: "Joe Timney" <joetimney at dol.net>
Cc: "land-speed" <land-speed at autox.team.net>
Sent: Friday, January 22, 2010 7:52 AM
Subject: Re: [Land-speed] Tire Valves


> Speaking of screw in valve stems...I got this tip from a rim manufacturer:
> Red or yellow color coded stems are ok, white or blue are not to be used 
> for our application.
> joe
>
> Kirkwood wrote:
>> I picked up some ''special'' tire valves this afternoon from a racing 
>> tire
>> distributor. He said a few folks are using them on their LSR tires. I 
>> have
>> never seen them before and would like your comments.
>>
>>
>> The usual steel valve is inserted from the inside and has a nut screwing
>> everything together from the outside (with a rubber gasket providing the
>> seal). These valves have a 1/8 NPT (tapered pipe thread). You just tap 
>> the
>> rim (carefully) and then screw them in from the outside. They are high
>> quality Schrader tank valves. There is no rubber gasket because the pipe
>> thread is self-sealing. I don't think any pipe thread is completely leak
>> proof but the dealer said red Locktite will do the job. There is no 
>> rubber
>> gasket which could be a failure point. What is your experience with the 
>> high
>> pressure (70psi) LSR tires? Is the screw in design as strong as the other
>> method?  TIA  :-)
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