cylinder head temp gauge sensor cht

gorskined · 04:01 AM

looking to install a cylinder head temp sensor my motor is apart and everything is easily accessible at the moment .. i am considering the swift dual cht gauge put one sensor in each bank . my only concern is trying to install the plugs and the sensor on my next spark plug change also the leeds are only 48" long can i solder and extend the leeds ???... open to options who is using what and does it work . has anyone installed aftermarket sensors and gauge and not used the spark plug as the mount or will the spark plug mount work fine ? .. if so what did you use and where did you mount the sensor?? thanks in advance.

Regards Ned

bpu699 · 02:12 PM

Quote:

Originally Posted by gorskined

looking to install a cylinder head temp sensor my motor is apart and everything is easily accessible at the moment .. i am considering the swift dual cht gauge put one sensor in each bank . my only concern is trying to install the plugs and the sensor on my next spark plug change also the leeds are only 48" long can i solder and extend the leeds ???... open to options who is using what and does it work . has anyone installed aftermarket sensors and gauge and not used the spark plug as the mount or will the spark plug mount work fine ? .. if so what did you use and where did you mount the sensor?? thanks in advance.

Regards Ned

Why?

You will get very different reading based on where you place the sensor, 30 degree difference moving in 2 inches. Also depends on airflow.

If it helps you, you can get dual thermoprobes with lcd read outs for $24 on amazon...

I just installed it on a bobcat skid steer air cooled motor... plopped some jd weld between 2 fins, pushed the sensor in. Works great...

Yes, it’s a skid steer not a Porsche... principle is the same. Yes, you can extend the leads.

https://www.amazon.com/s?k=12v+fahrenheit+panel+thermometer&crid=90B1JTSMNKBF&sprefix=Thermometer+12v+%2Caps%2C195&ref=nb_sb_ss_i_5_16

Mark Henry · 09:36 AM

I'm hooking up a Micro 1000, from Aircraft spruce, gauge sender and 15' extension wire kit.

I have a twinplug and right now the sender is fitted in the lower #1 with no mods. I have enough wire to swap it to any cylinder, so I'm planning to try different holes.

From my 914 T4 experience the plug hole is the only accurate place for the sender. My T4 powered bug I've used SDS EFI since 2004 on engines from a stock 1.8, 2.0 up to my present 2600cc, JE/nickies, 180hp mill. It's a valuable tool for pushing AFR limits, with steel cylinders best I can do is just over 13:1 AFR, with nickies I'm averaging 14+:1 AFR. I can see the head temps soar when I push AFR too far.

I've used VDO, better than nothing but not the most accurate, the micro1000 is way better and is automatic ambient temperature correcting.

winders · 01-27-2020, 10:14 AM

Quote:

Originally Posted by Mark Henry

It's a valuable tool for pushing AFR limits, with steel cylinders best I can do is just over 13:1 AFR, with nickies I'm averaging 14+:1 AFR. I can see the head temps soar when I push AFR too far.

Why push AFR like that???

https://www.youtube.com/watch?v=JzbLrn-2jyw

Mark Henry · 01-27-2020, 10:30 AM

Quote:

Originally Posted by gorskined

i am considering the swift dual cht gauge put one sensor in each bank . my only concern is trying to install the plugs and the sensor on my next spark plug change also the leeds are only 48" long can i solder and extend the leeds ???... open to options who is using what and does it work . has anyone installed aftermarket sensors and gauge and not used the spark plug as the mount or will the spark plug mount work fine ? .. if so what did you use and where did you mount the sensor?? thanks in advance.

Regards Ned

I have my sender in the lower spark plug hole, but the lower hole machining is the exact same as the top holes, I had no figment issues. Only sin is the wire upsets the plug lead rubber boot.
Just cut and remove the plug crush washer and slip the sender on, I put the plug in at factory torque.

The single 2" round gauge is just a hair smaller than the aftermarket VDO gauge, the part number is 10-01425, I don't know why it doesn't have a correct pic of the round gauge. You can get the Micro1000 in a dual sender flavor, but only in the square 2-1/4".

Don't solder the connections, both the sender and extension wires are very sensitive to modification, this is true of all CHT sensors. The sender has no power to it, only 12v connection is the gauge dash light.

I'd get the single 2" round, you can swap the location around and find the plug hole you're happy with. My experience you only need the single gauge.

Mark Henry · 10:54 AM

Quote:

Originally Posted by winders

Why push AFR like that???

https://www.youtube.com/watch?v=JzbLrn-2jyw

That would be at cruise speed 3000-3600rpm, not WOT.

At load or WOT I have .93 +/- lambda (13.65:1) which is about dead nuts on to the first pull torque/load in the vid link. I'll watch the rest of the vid later.

Carbs you have to run richer, I'm running 12.7:1 AFR in my weber fueled 3.0 as per Paul Abbott's recommendation. It runs about the same AFR cruise or WOT.