isspro post-turbo to pre-tubo egt probe

[AMongold]

i have decided to move my egt probe from post-turbo to pre-turbo and wondered if anyone had a set of directions? i have an isspro pyrometer with k-type thermocouple and needed to know drill size, tap size, tap depth, etc. i did a search but came up empty handed. i'm ready to put bigger injectors in, but not till i move my pyro probe. i appreciate all the help in advance!

 

[BWillard]

If I remember correctly, it's a 7/16th drill bit and 1/4" NPT tap. Just watch on the tap, it is tapered and if you go to far your bottom out the fitting before it's tight!!

 

[Kennywould]

If I remember correctly, it's a 7/16th drill bit and 1/4" NPT tap. Just watch on the tap, it is tapered and if you go to far your bottom out the fitting before it's tight!!

One more tidbit, tap it until you have about three full threads on the probe, I run the tap in a little then check it by threading the probe in, the worst thing to do is bottom out, plus you don't want the probe hitting the back side of the manifold, so be careful!