Started by ecoboostsho, June 07, 2014, 07:59:06 PM
Quote from: ecoboostsho on July 04, 2014, 05:14:01 PMYes the octane PID should be 100% ideally. I was at 75% for a bit but then switched gas stations and it actually went up to 100...
Quote from: Larrylu on July 04, 2014, 05:22:55 PMQuote from: ecoboostsho on July 04, 2014, 05:14:01 PMYes the octane PID should be 100% ideally. I was at 75% for a bit but then switched gas stations and it actually went up to 100...I could use a quick run down on the octane PID. I'm trying to envision the best way this could be used. It's learned octane right?
Quote from: FoMoCoSHO on July 04, 2014, 06:24:27 PMQuote from: ecoboostsho on July 04, 2014, 05:14:01 PMYes the octane PID should be 100% ideally. I was at 75% for a bit but then switched gas stations and it actually went up to 100...Notice any difference in how the car ran?
Quote from: wasinger3000 on July 04, 2014, 07:13:17 PMNow all I need is a ethanol PID hah. Wish we had a sensor stock.Are there any flex fuel taurus versions? If so would it be possible for our ecu to recognize a ethanol sensor?
Quote from: Larrylu on July 05, 2014, 07:11:27 AMNot getting it. What is "Learned Octane" and what does 75% or 100% of it mean?
Quote from: ecoboostsho on July 05, 2014, 08:18:23 AMQuote from: Larrylu on July 05, 2014, 07:11:27 AMNot getting it. What is "Learned Octane" and what does 75% or 100% of it mean? So the best way I can explain it is that the car is designed to run on a wide variety of Octane from the factory. It has to accommodate for Octane as low as 87 I believe. It doesn't have an actual sensor to do this but "Learns" it from (going to speculate a little bit here) knock or maybe some other parameters. If you put in 87 the car is going to knock more than when using 93....it sees the knock and probably pulls some timing, but I'm sure there is an algorithm that maybe adds it back in while it is learning to "test" it...if the knock is there under certain conditions then the ECU finally assumes you've put in lower octane gas and switches to a different timing table with lower numbers. You lose power but the car is still happy. It then sets the Learned Octane Ratio to a number that loosely corresponds to what it thinks the Octane of the gas is. Note: If you car is tuned for 93 then use 93 etc....the tune isn't going to compensate appropriately for 87 Octane. I believe anything over 91 or 93 octane should result in 100% while 87 may put you closer to 0%...
Quote from: Larrylu on July 05, 2014, 09:52:38 AMFirst test showed my usual 93 Sunoco achieving a 100% on startup. It will be interesting now to log some miles and see what turns up!