temp sensor for holley 2D What size? My manifold port is 1/2 npt and it looked like the sensor was a 3/8 npt, but it does not fit in a 1/2 to 3/8 reducer. Is this fawkin thing metric?

Autometer uses BPT (British Pipe Thread) for their temperature senders - maybe Holley does too? There was a thread (sorry, no pun intended) about this a while back; something to search/try.

I'll second the vote for BPT. I don't know that that's what it is, but like was said, Autometer uses BPT and so does some others like ARB.

so where do i get a fitting that will adapt the autometer BPT, to a 1/2" NPT? i been tryin to figure this out for a while now.

Dallas

Looks like BPT is wrong; it's probably BSPT; see here: http://www.pirate4x4.com/forum/showthread.php?s=&threadid=41890

The Holley temp sensor I just bought threaded right into the IH intake. Didn't pay attention to the size but it sure aint metric.;)