Knock sensor thread pitch?

[Shannen Durphey]

Jason_Leone at amat.com wrote:
> 
> Anybody know what the available thread pitch is on a standard single wire GM
> knock sensor? 1/8 NPT?
I've seen 10mm metric thread sensors on a Saturn (I'm running this on
my crossfire engine), and pipe thread sensors on V-8 engines.
Shannen

> 
> Reason I ask is this...I'm using an Electromotive TEC II on my VW VR6 engine,
> but the TEC II wants one single wire GM knock sensor. I currently have dual
> Bosch knock sensors (one per bank of cylinders) that came with the factory
> Motronic 2.9 system (but they aren't doing anything, obviously). The Bosch knock
> sensors are multi wire, and not single. I'll have to check my Bentley Manual
> wiring diagrams, to figure out the Bosch knock sensor wiring (-gnd, shield,
> +pos, etc.). I'm wondering if the tapped threads in the VR6 block will accept a
> GM knock sensor...perhaps the Bosch knock sensors are a metric thread (12mm or
> so)?
> 
> Another thought is to use a Bosch single wire knock sensor from the late '80s
> and early '90s 4 cyl/8v VWs. What do you guys think?
> 
> Oh yeah, "Todd...!!" gets the award for the most posts in a DIY_EFI digest. Get
> to work Todd, go buy some foreclosures or something! =)
> 
> Jason
> '93 SLC