hans14914

Rennlisters.

I would like to get some feedback on the idea of relocating the temp senor on the driver-side(US) responsible for sending the temp signal to the dash. As I see it, it is important to have a good temp reading, but not as critical as the TEMPII sensor responsible for adjusting trims in the LH/EZK.

Does anyone see a reason why relocating this sensor to the rear of the same head in the factory block-off plate would give an invalid reading? I know there is less flow in that area of the head, but I would assume that it would be accurate enough. I am planning on getting the IR gun out to prove this theory, but figured I would start with a discussion here.

Thanks,
Hans

SeanR

The only thing I can think of is, why would you want to? Is this just so you can have more room up front for the SC manifold?

Louie928

Hans,
I'm puzzled why you'd want to move the temp sensor at all. It works fine where it is. To answer you question, I wouldn't do it. The block off plate won't have the flow to give accurate readings. In my probably uninformed opinion. Moreover, you can get air or a steam bubble under that plate. If you have overheating indications, one thing to do is to unscrew that plate to let out any trapped air.

hans14914

I have an interference issue with the location of the factory sensor location. I am looking for a good place to relocate it to. That seemed like the most logical location. Any other ideas would be appreciated.

hacker-pschorr

You really want the gauge to agree with the LH and thermostat, that is why all three are so close together.

How about somewhere else in the coolant bridge like Todd did?

http://www.erik27.com/todd/turbo/01-...dge/index.html

Louie928

Hans,
Do you have room at the back of the water bridge? Move the sensor to the back side. I've done that before and it works ok.

hans14914

Unfortunately, no, that area is occupied as well. I could go in front of the waterbridge, but would much rather find a solution that does not require welding.

Koenig-Specials 928

How about this from 928-Motorsport until you find a more permanent solution.

Tony

thats on the wrong side of the thermostat isnt it...wont give you the actual water temp that the engine is seeing?

Kevin in Atlanta

So, tapping a hole into the 90 degree elbow won't work?

PorKen

I would think it'd be fine as long as you also put in a small bleed hose to the coolant reservoir. The temp gauge isn't that accurate anyway.

Bleed hoses from the rear of both heads wouldn't be such a bad idea, regardless. (Assumes heater is off.)

While you are at it, put in a low pressure sensor connected to the overheat light to indicate a sudden loss of coolant.

hans14914

I was thinking of just a small bleeder valve so it could manually be bled. I could look into an active bleeding system with a run to the expansion tank. I doubt there will be much more room for another sensor in that location.

Koenig-Specials 928

Wouldn't it be the same as the engine temp as long as the thermostat is open (> thermostat opening temp)? I do agree for a cold engine it will be on the wrong side.

Tony

That's what the large plume of white smoke in the rear view mirror is for..