[mitchntx]

Glenn has done tons of research on this and we are both about to the point of have custom machining done.

Autometer guages have a sending unit that is 1/8" NPT.
An LS1 motor has ports machined in, but are 12x1.5 metric.

Sure there are adaptors, but the wall is so thin the adaptors twist off with MINIMAL torque. And by that, not enough to crush a seal enough to prevent a leak.

Why don't they make a 12x1.5 sender?????

The stock sender ohms out WAY different ... almost 1K ohms lower than the AM.

[GlennCMC70]

...two words....

MECHANICAL GUAGES!

(IMG:http://www.frrax.com/rrforum/style_emoticons/default/cool.gif)

how does that solve the problem of putting NPT parts in METRIC holes that are very close in size?


and just for an FYI - i said "F" it, and pulled the water pump, drilled a hole just to the left of the T/B on the round part of the water pump that faces up. tapped it 1/8" NPT and put a temp sender there. i figured that was the bast place to look @ water temp as thats where the water leaves the pump to go to the radiator so it would be the hottest water.