LOR/OAR

[AJP turbo]

For all the LOR / OAR  junkies(fomo), i did a little test...im not all that into it other than making sure its less than 0...but i dont want it too low...to me that means i have room to advance my spark curve because either i have good gas or my curve is too retarded.

Lor or oar is like a long term fuel trim but for the spark curve...and the knock sensors is like the short term fuel trim...your ltft will scale your fuel curve so the 02 sensors arent making large adjustments....a well tuned car will have ltft close to 0 and also stft close to 0...a large ltft value means your fuel curve needs work.....the further from 0 your LOR value is the more your spark curve needs work

I pulled 10 degrees timing everywhere(globally). Set my learned octane min value to -2...down from the stock value of -1.

After a short drive my octane adjust ratio or oar was -1.81

The idea of tuning to me is setting as much as i can in the tune so im not relying on adaptives and scaling from learned values...you want it as close as possible immediately after a flash

The further from 0 the lor value is means the ecu is scaling the spark because it thinks the tables are set up poorly or fuel is vastly different than what the original tune was set up for

[FoMoCoSHO]

So that validates what I've been saying, if you have more octane than the tune can use, changing the min and max will let you actually see it.

And apparently I am probably leaving some power on the table.

[FoMoCoSHO]

"The further from 0 the lor value is means the ecu is scaling the spark because it thinks the tables are set up poorly or fuel is vastly different than what the original tune was set up for"

If that is so then why is the stock tune at or close to -1 with 93 when you get the most power?

[AJP turbo]

"The further from 0 the lor value is means the ecu is scaling the spark because it thinks the tables are set up poorly or fuel is vastly different than what the original tune was set up for"

If that is so then why is the stock tune at or close to -1 with 93 when you get the most power?

Looks like the tables in the tune were set up for 91 octane...the tune calls it "octane number for borderline spark table"

[FoMoCoSHO]

"The further from 0 the lor value is means the ecu is scaling the spark because it thinks the tables are set up poorly or fuel is vastly different than what the original tune was set up for"

If that is so then why is the stock tune at or close to -1 with 93 when you get the most power?

Looks like the tables in the tune were set up for 91 octane...the tune calls it "octane number for borderline spark table"

Ok so "premium" to Ford is 91 octane, that makes sense since 93 isn't available everywhere

[AJP turbo]

Yes they put 91 in the stock tune for that number....ive only ever seen a couple cars reccomend 93 from the factory.

So how many nasty comments does my findings buy me?...id like to bank them when i want to degrade some people lol

[SHOdded]

So how many nasty comments does my findings buy me?...id like to bank them when i want to degrade some people lol

Sorry, you must have confused us with the EPA.  We don't issue carbon credits OR potty mouth credits.

[J-Will]

What was the value prior to you making the changes?

Sent from my Nexus 6P using Tapatalk

[Scott4957]

Thanks for testing that jerk!

[AJP turbo]

Thanks for testing that jerk!

Lol....my previous lor is usually in a he -.90 range

[slurppie]

Is it safe to assume that if we are seeing -1 with a 93 tune that the tune itself is more geared towards the "safe" side of things?

sent from my speak n' spell using tin cans and string

[AJP turbo]

Is it safe to assume that if we are seeing -1 with a 93 tune that the tune itself is more geared towards the "safe" side of things?

sent from my speak n' spell using tin cans and string

I would go with that statement.......although due to conditions i would say its normal to see a -1 lor and see the knock sensor adding and pulling spark

[FoMoCoSHO]

So how many nasty comments does my findings buy me?...id like to bank them when i want to degrade some people lol

Sorry, you must have confused us with the EPA.  We don't issue carbon credits OR potty mouth credits.

Maybe we need a EBPF swear jar?

[EcoPowerParts]

So how many nasty comments does my findings buy me?...id like to bank them when i want to degrade some people lol

Sorry, you must have confused us with the EPA.  We don't issue carbon credits OR potty mouth credits.

That was AWESOME!

[J-Will]

Is it safe to assume that if we are seeing -1 with a 93 tune that the tune itself is more geared towards the "safe" side of things?

sent from my speak n' spell using tin cans and string

while 'safe side' may be accurate, I would argue that this gives head room for typical variables. While 93 may not be available everywhere could be a valid reason, I would mention that not every driver is going to use top tier gas (regardless of octane).