my first crack at this tuning thing check it out.
1st gear is showing 12.5's at WOT, however for all other gears that reach the same load cells the AFR's are fine, so it looks like it's only in first that it runs that lean at WOT.
Also, the 21 AFR when lifting off the throttle while still in gear is because the injectors effectively shut off, as the wheels are keeping the engine running and not the opposite.
I get AFR's of 21 occasionally at idle as well, I don't know how bad it is for the engine, I usually give it a little tap of the throttle which gets it out of it's "daze" and back to regular AFR's.
Also, the 21 AFR when lifting off the throttle while still in gear is because the injectors effectively shut off, as the wheels are keeping the engine running and not the opposite.
I get AFR's of 21 occasionally at idle as well, I don't know how bad it is for the engine, I usually give it a little tap of the throttle which gets it out of it's "daze" and back to regular AFR's.
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well im new to tuning evos.as far as the afr during off throttle and idle i leaned it out more for fuel economy. but some of the fluctuations are due to the cams. they make things bounce around a bit while the computer constantly tries to stabilize things.
im not too worried about it but i am still in the process of tuning this car.
your right my map is not a very aggressive tune but then again i run pump gas and still have a lot of stock parts just more boost so theres only so much your going to be able to do safely. and its really hot here in fl.
and im running a greddy profec b spec 2 for boost control..for now until i decide to try this ecu boost control.which i personally think is a pita.
im not too worried about it but i am still in the process of tuning this car.
your right my map is not a very aggressive tune but then again i run pump gas and still have a lot of stock parts just more boost so theres only so much your going to be able to do safely. and its really hot here in fl.
and im running a greddy profec b spec 2 for boost control..for now until i decide to try this ecu boost control.which i personally think is a pita.
Could you post up the same datalog but include the LogEntrySeconds Column as well so we can see how your power curve is looking?
Definitely richen it up where you are hitting 13:1 AFR at peak torque, thats a bit lean and I'm kinda surprised you didn't knock to be honest.
Try to use 2-byte or 1-byte load instead of LoadCalc, its not really all that accurate for tuning. Don't bother logging fuel trims during a 3rd gear pull to minimize the amount of data being recorded so you can increase the resoultion of the more important data items.
Definitely richen it up where you are hitting 13:1 AFR at peak torque, thats a bit lean and I'm kinda surprised you didn't knock to be honest.
Try to use 2-byte or 1-byte load instead of LoadCalc, its not really all that accurate for tuning. Don't bother logging fuel trims during a 3rd gear pull to minimize the amount of data being recorded so you can increase the resoultion of the more important data items.
Last edited by Jack_of_Trades; Jul 29, 2010 at 04:32 PM.
the only thing thats really bothering me is trying to get this thing to hold x amount of boost .it makes it really hard too tune when it spikes to 25 then tapers down to 20.7 or whatever . but ive been trying to dial in this greddy unit for a while with little luck.
Another thing I usually try to do is limit the timing jumps to no more than 2 degrees between neighboring cells in the power curve area. For some reason, knock tends to find its way into the tune when you ask the ECU to interpolate to large of a jump too quickly.
Also, if your tune seems to hover between two load columns, make sure there isn't a drastic difference in timing between the two columns. That way if the tune is kind of teetering between the two columns, your timing curve isn't jumping all over the place and having a heck of a time staying on track.
Also, if your tune seems to hover between two load columns, make sure there isn't a drastic difference in timing between the two columns. That way if the tune is kind of teetering between the two columns, your timing curve isn't jumping all over the place and having a heck of a time staying on track.
Last edited by Jack_of_Trades; Aug 17, 2010 at 04:52 PM.
Could you post up the same datalog but include the LogEntrySeconds Column as well so we can see how your power curve is looking?
Definitely richen it up where you are hitting 13:1 AFR at peak torque, thats a bit lean and I'm kinda surprised you didn't knock to be honest.
Try to use 2-byte or 1-byte load instead of LoadCalc, its not really all that accurate for tuning. Don't bother logging fuel trims during a 3rd gear pull to minimize the amount of data being recorded so you can increase the resoultion of the more important data items.
Definitely richen it up where you are hitting 13:1 AFR at peak torque, thats a bit lean and I'm kinda surprised you didn't knock to be honest.
Try to use 2-byte or 1-byte load instead of LoadCalc, its not really all that accurate for tuning. Don't bother logging fuel trims during a 3rd gear pull to minimize the amount of data being recorded so you can increase the resoultion of the more important data items.
Yeah, use the 2-byte LOAD but the 1-byte RPM (Engine RPM) will do just fine unless your tune needs to exceed 7968 RPM where it reaches the limits of 1-byte RPM logging. Then you'd need to use the 2-byte RPM logging if you ever needed to exceed the 1-byte RPM limit.
Last edited by Jack_of_Trades; Aug 17, 2010 at 04:53 PM.