using thermistors instead of temp sensors

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.

If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).

If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days

The full forum rules are here: Forum Rules, be sure to read them all regularly.
Post Reply
ratty2e
MegaSquirt Newbie
Posts: 4
Joined: Wed Sep 30, 2009 12:17 pm

using thermistors instead of temp sensors

Post by ratty2e »

I want to use standard thermistors instead of automotive air temp/coolant temp sensors. The reason is that space is very limited , as i am converting a 25cc engine,so the air filter is very small and i don't have any space to attach the coolant sensor. So i was going to epoxy a thermistor to one of the engine fins and epoxy one inside of the air filter.

What i would like to know is what resistance of thermistor would be best suited to my application they come in 100 ohm,300ohm,1k,5k,10k,20k,100k resistances .I know i can alter the reading in easytherm , but does it have to be within limits :?: Can somebody help!! :?
Top
cygnus x-1
MegaSquirt Newbie
Posts: 32
Joined: Wed Jul 18, 2007 8:57 pm
Location: Chicago suburbs

Re: using thermistors instead of temp sensors

Post by cygnus x-1 »

The default sensor in Megatune is a GM sensor. So if you can find something close to that you know it will work. There is a table in the megamanual that has the temperature and resistance values for the GM sensor.

C|
Top
Post Reply

Return to “Wiring and Sensors”