The V8 Owners Forum -

DaveEFI wrote:

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.

Not really. The standard around the world for O2 sensors is M18. There are a few variations, but the bulk are M18. The sensor is large, hence a large thread.

An M18 coolant or air temp would be a very very rare thing.

You could probably buy one of these alloy adaptors to something else...cut the dead end off and re-tap as required

http://stores.ebay.co.uk/Torques-U-K/_i ... d=81447352


or buy the ATS04 Marelli sensor and use this

http://www.ebay.co.uk/itm/Spark-Plug-Th ... 35ca740146

There are other similar adaptors on egay

As I said, the CTS on my SDI EFI is M18. That's why I fitted an M18 ATS to my home made trunking.