ok I got a isspro R3607TRK pyro kit for christmas and was just getting around to installing it.
but I missplaced the directions for installing the pyro, only have the elec directions. I cant seem to find the right size drill or tap for install it. it has the piece i thread into manifold about 3/8ths inch( piece in question) and a little crush piece inside a larger peice that threads over it. please help.

 

The fitting that you need to thread into the manifold should be around the probe already, right?

1/8" NPT probably?



Here's a tap size/ drill size chart:

NPT Tap Drill Sizes - Engineer's Handbook

 

its 1/8th inch pipe

 

are the autometers different than the isspros? cause the drill bit i had to use was a hell of a lot bigger than that it was like a 3/8" or somewhere around there IIRC

 

I used a 1/8" pipe tap on mine and it was an Isspro gauge

 

i found my autometers you guys are right its 1/8" pipe. guess my memory was way off i remember it being way bigger than that

 

I know my Autometer needed a letter bit, an R, if I remember correctly.

 

I did the same thing when doing my 89... Went by memory... Used a 1/4 NPT... Now I have a nice brass reducer to make it work.