<VV> Thermisters (Now plug depth)

[Rick & Janet Norris]

As for carbon in the last threads of a head, all you need is a tool from 
NAPA or other FLAPS. I have one made by K-D that will chase two thread sizes 
and fits neatly in a sparkplug socket. It will reach through the end of the 
threads so id the head is on the car you need to make sure the piston is 
down the bore to prevent any interference.

Rick Norris

> Hello Craig,
>
> I have always wondered if there is any issue with sparkplug thread depth 
> when
> you use an under-the-plug thermistor.  Obviously, the sparkplug will sit a
> little higher in the hole by the thickness of the thermistor.  If any of 
> the
> threads in the head are exposed, wouldn't there be a problem with carbon 
> build
> up?  This could cause a problem if you ever remove the thermistor for any
> reason.  The carboned threads would cause interference with the plug that 
> would now
> want to go deeper.  Also, if the plug is at all recessed in the plug hole,
> could this cause an ignition problem?  I understand that some plugs 
> already have
> a depth problem even without the use of an under-the-plug thermistor.
>
> Inquiring minds want to know.
>
> Doc
> ~~~~~~~~~~
> In a message dated 8/15/2005 7:52:46 AM Pacific Daylight Time,
> virtualvairs-request at corvair.org writes:
>
>> Message: 7
>> Date: Mon, 15 Aug 2005 10:36:32 EDT
>> From: NicolCS at aol.com
>> Subject: <VV> Thermisters
>> To: virtualvairs at corvair.org, pp2 at 6007.us
>> Message-ID: <158.56bb6e03.30320270 at aol.com>
>> Content-Type: text/plain; charset="US-ASCII"
>>
>>
>> AC no longer manufactures the thermister but they seem to be somewhat
>> available used; usually trading for $75 give or take.  There are no 
>> direct
>> replacements. Many EE-types have investigated substitutes.  Lew Richel 
>> (San Diego)
>> sells a rough substitute that provides a reading on the gauge, but  it's 
>> not
>> accurate.  He includes a conversion chart.  Clarks  occasionally has new
>> thermisters and their price is $250 or so.  VDO  and Westech both make 
>> CHT gauge
>> setups.  I'm not familiar with the Westech  sender but the VDO sender 
>> attaches
>> under a sparkplug.  The VDO unit  provides accurate readings at the plug 
>> but
>> these readings do not seem to  correlate to what we see with the GM
>> hardware.
>> <snip>
>> Craig Nicol
>>
>
> _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are 
> the property
> of the writer, please attribute properly. For help, 
> mailto:vv-help at corvair.org
> This list sponsored by the Corvair Society of America, 
> http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options: 
> http://www.vv.corvair.org/mailman/options/virtualvairs
> _______________________________________________
>