Air temperature sensor

DaveEFI · Post by **DaveEFI** » Tue Sep 09, 2014 5:45 pm

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.

Cobratone · Post by **Cobratone** » Tue Sep 09, 2014 6:21 pm

Can't you get an adapter Dave??

DaveEFI · Post by **DaveEFI** » Tue Sep 09, 2014 7:13 pm

Dunno - thought the two sizes might be too close for that?

SimpleSimon · Post by **SimpleSimon** » Tue Sep 09, 2014 7:37 pm

Hi Dave

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

Eliot · Post by **Eliot** » Tue Sep 09, 2014 8:43 pm

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.

DaveEFI · Post by **DaveEFI** » Tue Sep 09, 2014 10:43 pm

SimpleSimon wrote:Hi Dave 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

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?

DaveEFI · Post by **DaveEFI** » Tue Sep 09, 2014 10:47 pm

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.

bodger · Post by **bodger** » Wed Sep 10, 2014 10:23 am

http://shop.motorsport-developments.co. ... -167-p.asp

) ?

DaveEFI · Post by **DaveEFI** » Wed Sep 10, 2014 11:05 am

bodger wrote:http://shop.motorsport-developments.co. ... -167-p.asp

) ?

Yes - that's the sort of thing. Sadly, it doesn't say what thread it fits?

bodger · Post by **bodger** » Wed Sep 10, 2014 6:19 pm

It could be about right going by the connector size ...
Maybe a phone call ?

M18 is lambda bung size isnt it ?

DaveEFI · Post by **DaveEFI** » Wed Sep 10, 2014 10:39 pm

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.

DaveEFI · Post by **DaveEFI** » Wed Sep 10, 2014 10:43 pm

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.

SuperV8 · Post by **SuperV8** » Fri Sep 12, 2014 1:39 pm

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.

stevieturbo · Post by **stevieturbo** » Sat Sep 13, 2014 10:34 pm

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

DaveEFI · Post by **DaveEFI** » Sat Sep 13, 2014 10:48 pm

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.