[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.

[steve-d]

I was curious how the gauges would read off the track and took the car out onto the street. Ambient temp was around 85* Temps driving around in a "spirited fashion" on the street:

water-- 195*-200*

oil------- 220*

Seems in line w/others. Now I don't know if the pegged 320*+ on the track was wrong. As Jon stated, it may have (unfortunately) been accurate!! OMG! I wonder how much extra that pegged needle was trying to tell me?

I wonder if the mech hooked the lines up correctly? Front line on the engine adapter goes to which radiator opening?

IOW, which engine oil hose is the outlet to the radiator -- front or rear?

Regards
Steve