| Re: EFI Question [message #349780 is a reply to message #349779] |
Thu, 31 October 2019 18:42   |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma:
|
Senior Member |
|
|
Chris Tyler wrote on Thu, 31 October 2019 19:16Slightly off topic but related:
Given the above discussion about pulses, are 02 sensors/gauges useful as a tuning aid on two stroke engines, or would EGT be more useful?
Chris,
I hope you are ready...... EGO - Exhaust Gas O2 UEGO - Wide Band EGO HEGO - Heated EGO
There have been attempts to use EGOs and/or UEGO on some 2 stroke engines. They have been used in development, but in a real world application, there are some big issues. 2 Stroke exhaust temperatures are lower. They are hot enough to light an EGO at load, but they are not reliable to do so. There is (with some special exceptions) more lubricating oil residual in that exhaust. Lubricating oil must contain (even the modern ashless oils) some of the "metallic" antiwear additives. These will foul the chemical process that makes the EGO work. It is very difficult to tell when a sensor is failing, because they don't "go out". From a calibration stand point, they just get slow. So, if you were to use it for initial calibration, you might get by. But, you would have to do this with the understanding that the sensor life may not be very long.
If the electrical system can support it, I HEGO might get you by the slow heat up time.
Is that a help? I can try again if there is a not understood point.
Matt - the engine lab refugee
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
