OK to put temp senor in waterpump bypass line?

[bingo2]

I'm not certain what having a heater has to do with this. Put the tee in the other port on the intake manifold.

I have the Holley Sniper atop an Edelbrock Air Gap intake, which is a dual plane, and haven't experienced any issues.

[Apex_speed]

Originally Posted by bingo2

I'm not certain what having a heater has to do with this. Put the tee in the other port on the intake manifold.

I have the Holley Sniper atop an Edelbrock Air Gap intake, which is a dual plane, and haven't experienced any issues.

Glad to hear it's running well for you.

The heater return hose IS IN THE RIGHT PORT of the manifold. If you put a street tee there, you can still attache the heater return to the top of the tee. BUT, I have had an issue where running the temp sender in an adaptor block (street tee) lifted it far enough away from the coolant flow that it didn't read accurately. This was not on a V8 though but a guy on here had a similar issue on a 427R. The heater comment is that when you turn the heater on, it circulates coolant THROUGH the street tee with the sender mounted in it and then would read more accurately (heater core does cool down the return temp a bit if the heater is on).

Anyway, I'm going to pick up a tee at the hydraulic supply house tomorrow when I'm there and try it. I suppose it's worth a shot and I can compare the dash gauge to the data in the Holley system to see if it reads reasonably accurately.

I suppose it's possible that the guy that had the issue had air in his system as that's about where it would end up as it's the highpoint.

[bingo2]

I get all that but, you have two ports, the tee doesn't need to be in the same port as the heater fitting.

[xb-60]

Originally Posted by Apex_speed

....I have had an issue where running the temp sender in an adaptor block (street tee) lifted it far enough away from the coolant flow that it didn't read accurately.....

I agree. I also had the same issue on my Alfa, using a tee to to be able to fit an oil temp sender.
The result of the sender being out in the air flow rather than in direct contact with the block or head was that it read way too low.

Cheers,
Glen

[Apex_speed]

Originally Posted by bingo2

I'm not certain what having a heater has to do with this. Put the tee in the other port on the intake manifold.

I have the Holley Sniper atop an Edelbrock Air Gap intake, which is a dual plane, and haven't experienced any issues.

Ok, how about we try this if you don't mind....where are the following located in your car?

1. Holley Sniper coolant temp sender?

2. Dash gauge coolant temp sender?

3. Heater return line?

[bingo2]

No heater. The CTS is located in the passenger side port where the heater valve would be located and the sender for the analog temperature gauge is in the driver side port. I originally had them installed opposite of their current location but, I changed to more efficiently route the wiring; readings were identical from either location. If I did have a heater, I would try the tee in the driver side port and if it didn't function to my satisfaction I would drill and tap another port as others have suggested.

[Apex_speed]

Originally Posted by bingo2

No heater. The CTS is located in the passenger side port where the heater valve would be located and the sender for the analog temperature gauge is in the driver side port. I originally had them installed opposite of their current location but, I changed to more efficiently route the wiring; readings were identical from either location. If I did have a heater, I would try the tee in the driver side port and if it didn't function to my satisfaction I would drill and tap another port as others have suggested.

Ok, thanks.

I'm going the path of least resistance for now. Holley sender on the right side and gauge sender on the left side as the Edlebreock Performance RPM manifold is drilled correctly for that.

I think I will look into an extension for the t-stat housing that is threaded for a sender as that would likely work well. I'm just not sure if it's physically possible in an SPF Cobra with a 351W block and the surge tank mounted at the top front of the engine.

[Gaz64]

Is there no room in the front water crossover to add a temp sender?

I would drill a hole, tap it 1/8 npt, and fit the sender.
That way you can see the engine warming up on all gauges.
Adding a sender after the thermostat, the gauge will barely work at all, then rise up, showing the thermostat operation.
Unless you want to see it that way.

Gary

[cycleguy55]

Originally Posted by Apex_speed

Ok, how about we try this if you don't mind....where are the following located in your car?

1. Holley Sniper coolant temp sender?

2. Dash gauge coolant temp sender?

3. Heater return line?

BTW, the fitting on the intake manifold is the hot coolant to the heater, and the heater return goes to the water pump.

[Gaz64]

Originally Posted by cycleguy55

BTW, the fitting on the intake manifold is the hot coolant to the heater, and the heater return goes to the water pump.

If you must use a heater hose, this is correct.

Using the return hose would be like placing it in the bottom hose, as the return from the radiator.