[64speed]

I am running both the factory light and a mechanical gauge in my car. Right now I have the idiot light in the back of the head and the gauge probe in the crossover. I am going to have to cut back the wrap on the harness to get this to work. Long story short how inaccurate will my gauge be if it’s in the back of the head and place the idiot light in the crossover?

[chuckies76ta]

Well, seeing the coolant enters the block through the large holes in the front of the block from the water pump, I believe it then moves coolant through the holes in block into the heads which moves it to the front crossover then exits through the thermostat when open. So I would say the coolant is at it's hotter point when it gets into the crossover. The passenger head moves coolant to the heater core then back to water pump. I would say the gauge in the crossover would be the better location for the coolant temp point. I would think for a more accurate reading. There maybe other factors at play when it comes to engine temp.

[steve25]

It’s hard to say, but why don’t you get the car running first and then once the motor has been broken in and idling at temp, take a thermal gun and shoot the rear of each head where a water nipple could go and then do the same at the crossover .

I doubt you will find more then a 8 degree difference between front and rear once everything is all heated up and at a stable temperature and at cruse rpms, but at full throttle and high rpm there may be a greater difference.

[64speed]

Originally Posted by steve25

It’s hard to say, but why don’t you get the car running first and then once the motor has been broken in and idling at temp, take a thermal gun and shoot the rear of each head where a water nipple could go and then do the same at the crossover .

I doubt you will find more then a 8 degree difference between front and rear once everything is all heated up and at a stable temperature and at cruse rpms, but at full throttle and high rpm there may be a greater difference.

That sounds good. This M&H harness is really nice and I don’t want to make a splice unless I have too. The sending unit is in the drivers head. Will that make a difference you think?

[grivera]

Where are you installing the the Sniper temp sensor?

[HWYSTR455]

If you have a gauge, just eliminate the idiot light, you will never use it anyway. Plus, I believe the factory light/sensor doesn't come on until like 225-230 degrees.

If you're intent on running it, just add a jumper wire from the harness back to the new sensor location, done.

.

[64speed]

Originally Posted by HWYSTR455

If you have a gauge, just eliminate the idiot light, you will never use it anyway. Plus, I believe the factory light/sensor doesn't come on until like 225-230 degrees.

If you're intent on running it, just add a jumper wire from the harness back to the new sensor location, done.

.

I am putting the sniper sensor in the crossover. I like having the light cause you aren’t always looking at the gauges AND I am anal and like everything to work.

[dataway]

Some idiot light temp sensors, in fact quite a few of them, are adjustable ... small slotted screw in a recess next to the terminal .... you could adjust it to compensate for whatever location you use it in.