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Air temperature sensor

Posted: Tue Sep 09, 2014 5:45 pm
by DaveEFI
I'm looking for an open frame ATS with an 18mm thread. Junior timer connector even better. All the ones I seem to find from MegaSquirt etc dealers are NPT.

Posted: Tue Sep 09, 2014 6:21 pm
by Cobratone
Can't you get an adapter Dave??

Posted: Tue Sep 09, 2014 7:13 pm
by DaveEFI
Dunno - thought the two sizes might be too close for that?

Posted: Tue Sep 09, 2014 7:37 pm
by SimpleSimon
Hi Dave :D why not use an NPT one out of curiosity? I got some ali bosses for this thread from the states for my 2 MS installs 8)

Posted: Tue Sep 09, 2014 8:43 pm
by Eliot
You can buy the thermistor from RS under part number 151-215 which is the same curve as the GM one used on megasquirt.

Then you can make up any fitting you like with a boss and some epoxy. I used them for measuring my intercooler water temperatures on the megsquirt. In fact they are so small, you can just tuck them into the air pipe.

Posted: Tue Sep 09, 2014 10:43 pm
by DaveEFI
SimpleSimon wrote:Hi Dave :D why not use an NPT one out of curiosity? I got some ali bosses for this thread from the states for my 2 MS installs 8)
Because my housing already has an 18mm thread and the wiring a Junior power timer connector. So one that simply replaces the existing one would be easiest - surely they must exist? Most vehicles other than US ones would have metric threads?

Posted: Tue Sep 09, 2014 10:47 pm
by DaveEFI
Eliot wrote:You can buy the thermistor from RS under part number 151-215 which is the same curve as the GM one used on megasquirt.

Then you can make up any fitting you like with a boss and some epoxy. I used them for measuring my intercooler water temperatures on the megsquirt. In fact they are so small, you can just tuck them into the air pipe.
MS can be calibrated for most sensors. The GM curve is simply the default one.

I'm not sure I could be bothered making up one since ready made ones are cheap enough.

Posted: Wed Sep 10, 2014 10:23 am
by bodger

Posted: Wed Sep 10, 2014 11:05 am
by DaveEFI
Yes - that's the sort of thing. Sadly, it doesn't say what thread it fits?

Posted: Wed Sep 10, 2014 6:19 pm
by bodger
It could be about right going by the connector size ...
Maybe a phone call ?

M18 is lambda bung size isnt it ?

Posted: Wed Sep 10, 2014 10:39 pm
by DaveEFI
bodger wrote:It could be about right going by the connector size ...
Maybe a phone call ?

M18 is lambda bung size isnt it ?
Think so. It's also the size of the CTS in my RV8 - so I sort of assumed it was a standard.

Posted: Wed Sep 10, 2014 10:43 pm
by DaveEFI
bodger wrote:It could be about right going by the connector size ...
Maybe a phone call ?

M18 is lambda bung size isnt it ?
Think so. It's also the size of the CTS in my RV8 - so I sort of assumed it was a standard.

I''ve tried contacting an Ebay seller about one which looked correct. They couldn't tell me what the thread was. I've a feeling there is an NPT used which is similar in diameter, so difficult to tell at a glance.

Posted: Fri Sep 12, 2014 1:39 pm
by SuperV8
I use this one TS10219-12B1

http://www.delphicat.com/WebForms/frmDe ... 0527738554

Fits cosworth and all manor of others inc Ferrari F40!!!
Has a M14x1.5 thread and mini timer connection so half way there!
Might be able to get/make M14 to M18 adaptor?
Tom.

Posted: Sat Sep 13, 2014 10:34 pm
by stevieturbo
M18 is bloody massive, cant imagine why an air temp would ever be so large.

Even the Cossie M14 is larger than most.

just adapt it down, weld/block up the old hole etc etc

Posted: Sat Sep 13, 2014 10:48 pm
by DaveEFI
stevieturbo wrote:M18 is bloody massive, cant imagine why an air temp would ever be so large.

Even the Cossie M14 is larger than most.

just adapt it down, weld/block up the old hole etc etc
You could say the same about an 02 sensor. Or CTS. The CTS on the flapper and hotwire RV8 is 18mm.