How To Tune an Evo
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Joined: Jan 2008
Posts: 17
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From: Germany
Last thing than I'm going to bed,lol.
For the most precise adjustments from 7.38 AFR to 14.7 AFR:
Change "Edit Increment" to 0.0575
Change "Format" to %.2f (so you can see the number change every time you go up or down one increment)
For the most precise adjustments from 7.38 AFR to 16.08 AFR (for you fuel economy tweakers):
Change "Edit Increment" to 0.0685
Change "Format" to %.2f (so you can see the number change every time you go up or down one increment)
These give you the most adjustments possible in our usable range in the Fuel Map cells.
For the most precise adjustments from 7.38 AFR to 14.7 AFR:
Change "Edit Increment" to 0.0575
Change "Format" to %.2f (so you can see the number change every time you go up or down one increment)
For the most precise adjustments from 7.38 AFR to 16.08 AFR (for you fuel economy tweakers):
Change "Edit Increment" to 0.0685
Change "Format" to %.2f (so you can see the number change every time you go up or down one increment)
These give you the most adjustments possible in our usable range in the Fuel Map cells.
Which most O2's can not do. So it has not much use putting a value like 12.65, because you can not measure the result on 2 decimals. You get for example 12.6 from the O2 sensor which has a span of 12.5 -12.7.
You can try to enter more precision "AFR" values but you would also need then a O2 sensor which is capable to measure accurately on at least 2 decimals (like 11.95).
Which most O2's can not do. So it has not much use putting a value like 12.65, because you can not measure the result on 2 decimals. You get for example 12.6 from the O2 sensor which has a span of 12.5 -12.7.
Which most O2's can not do. So it has not much use putting a value like 12.65, because you can not measure the result on 2 decimals. You get for example 12.6 from the O2 sensor which has a span of 12.5 -12.7.
Last edited by Jack_of_Trades; Feb 29, 2008 at 04:05 AM.
you guys do realize that afr's are just thermal management and that getting into the decimals of an afr wont affect horspower or torque. If you take your map cel from 13.1 to 13.0 you are probably not going to see a difference in hp or tq numbers, so why go so deep into the decimals of the afrs if they really don't make that much of a difference.......unless it'S JUST BECAUSE YOU CAN!!!!
you guys do realize that afr's are just thermal management and that getting into the decimals of an afr wont affect horspower or torque. If you take your map cel from 13.1 to 13.0 you are probably not going to see a difference in hp or tq numbers, so why go so deep into the decimals of the afrs if they really don't make that much of a difference.......unless it'S JUST BECAUSE YOU CAN!!!!
It never hurts to have MORE control over things than you need to use
I'd rather have smaller incremental changes from cell-to-cell during a pull than larger jumps. There is nothing wrong with a quest for perfection,lol. It had more to do with the fact that a question was posed on how the incremental changes were a little funky, then we just wanted to get into the specific DETAILS of how the adjustments were working for us and how we could manipulate them. THough it may not be necessary, simply changing your "edit Increment" value from .1 to .0575 adds 42% more adjustability between the 7.38 and 14.7 cells. This would useful for someone who wants to try and tune as CLOSE to their knock edge as possible I guess.Yeah..basically cuz we can I guess,lol.
Last edited by Jack_of_Trades; Mar 4, 2008 at 02:41 PM.
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Joined: Nov 2007
Posts: 85
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From: Atlanta, Georgia
Subscribed! Thanks for the great write up. All that information went WAY over my head, but i will keep reading it untill i understand it. Great that people share their talents and love of cars with the rest of us. Keep up the good work! :-)
Just do a lot of reading (books, papers, abstracts, magazines, **** - JK), logging, flashing, dynoing; spending of a lot of money, time in the garage while pissing off your wife, and developing a dependence to non-domestic beer.
This is what it takes to become an arm-chair tuner - being part of the abyss as myself.
This is what it takes to become an arm-chair tuner - being part of the abyss as myself.
