ECUflash tutorial for beginners
To clarify more.. Their not exact.. Ever..
Basically, the AFR number value was assigned to make the tables easier to read.. 14.7 is the mid-point value, if it was a decimal value of 0-255, I think it would have been either 64 or 128 as the middle value (I haven't looked recently) but people found that to be confusing as the number is really just a representation, the lower the number, the more fuel you add, the higher the number, you remove fuel..
Ultimately never rely on those values as being what they say, always rely on wideband O2 sensors.
Basically, the AFR number value was assigned to make the tables easier to read.. 14.7 is the mid-point value, if it was a decimal value of 0-255, I think it would have been either 64 or 128 as the middle value (I haven't looked recently) but people found that to be confusing as the number is really just a representation, the lower the number, the more fuel you add, the higher the number, you remove fuel..
Ultimately never rely on those values as being what they say, always rely on wideband O2 sensors.
To clarify more.. Their not exact.. Ever..
Basically, the AFR number value was assigned to make the tables easier to read.. 14.7 is the mid-point value, if it was a decimal value of 0-255, I think it would have been either 64 or 128 as the middle value (I haven't looked recently) but people found that to be confusing as the number is really just a representation, the lower the number, the more fuel you add, the higher the number, you remove fuel..
Ultimately never rely on those values as being what they say, always rely on wideband O2 sensors.
Basically, the AFR number value was assigned to make the tables easier to read.. 14.7 is the mid-point value, if it was a decimal value of 0-255, I think it would have been either 64 or 128 as the middle value (I haven't looked recently) but people found that to be confusing as the number is really just a representation, the lower the number, the more fuel you add, the higher the number, you remove fuel..
Ultimately never rely on those values as being what they say, always rely on wideband O2 sensors.
Basically, all the AFR value really is, is the injectors pulse width size. We are just increasing or decreasing this value.
There is actually a set of 2D maps which each map represents ONE RPM value from the fuel maps RPM axis (lets say 3000RPM) and the other axis is the Engine load. On this chart should be what the actual injector pulse width settings are for each load value on the chart. Sadly, no one has found these yet though.
Attached is an example of this kind of map.
Last edited by Jack_of_Trades; Mar 7, 2008 at 12:01 PM.
Newbie
Joined: Nov 2007
Posts: 89
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From: World Wide
The stock turbo will not make 319 load, thats is about 31 psi. I think you miss understand my question. So let me put it another way. Why remove the safety of the boost cut all together? What is the point? By the time you get to 319 load (if you ever do) the knock will be off the scale and the boost cut can only be an additional safety measure.
MB
MB
I have looked into recent Roms from a well known Tuners and they have Maxed out the Boost cut number to 1638375 !?
What Burgers22 say make more sense to me.
Can the expert ecuflash tuners answer that please?
That number is the delay time in milliseconds before the ECU engages the boost. Thats the largest number value you can possibly enter into that parameter, basically disabling it completely. Its mostly used on cars that are running larger turbo's that are exceeding the 319load value. I can hit over 319 load at peak in my tune which most likely has to do with my MAF scaling alterations so there are instances when a stock turbo setup can in fact exceed the 319 load.
Newbie
Joined: Nov 2007
Posts: 89
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From: World Wide
That number is the delay time in milliseconds before the ECU engages the boost. Thats the largest number value you can possibly enter into that parameter, basically disabling it completely. Its mostly used on cars that are running larger turbo's that are exceeding the 319load value. I can hit over 319 load at peak in my tune which most likely has to do with my MAF scaling alterations so there are instances when a stock turbo setup can in fact exceed the 319 load.
It is clear that i did not ask what is Boost delay or what is the largest number you can enter in millisecond!
Let me clear what i said in other words:
This is an excellent safety feature (Boost Delay) that Mitsubishi engineered into the ECU.
I see it disabled on cars set up with 21-23 psi with JDM MAPS.
But thanks for the reply
It is clear that i did not ask what is Boost delay or what is the largest number you can enter in millisecond!
Let me clear what i said in other words:
This is an excellent safety feature (Boost Delay) that Mitsubishi engineered into the ECU.
I see it disabled on cars set up with 21-23 psi with JDM MAPS.
But thanks for the reply
Let me clear what i said in other words:
This is an excellent safety feature (Boost Delay) that Mitsubishi engineered into the ECU.
I see it disabled on cars set up with 21-23 psi with JDM MAPS.
But thanks for the reply
Because "well known" does not equal good. Or mean that they care if you blow your sht up.
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Joined: Nov 2007
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From: World Wide
This feature should be disabled only if running over 319 load.
Evolved Member
Joined: Mar 2008
Posts: 730
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From: Lattitude 48.38°, Longitude 17.58°, Altitude 146m = Slovakia, for common dude
There is no threshold, ECU adjusts the value according to octane number, calculates mean between low and high, octane number depends on number of knocks.
Question for those who never tuned. Is it easy to tune?
I have intercooler pipes and tbe and trying to tune. Its either pay around $100 for cable and do it myself(while learning) or pay someone around $300.
I have intercooler pipes and tbe and trying to tune. Its either pay around $100 for cable and do it myself(while learning) or pay someone around $300.
it is easy to self tune as long as you have read as much as you can on how to tune our cars. just make sure when you adjust things make it in small increments. Also its not $100 to be able to self tune. you would also need to invest on a wideband which ranges from around $200-$500 depending on brand and what is included. good luck self tunning.
Newbie
Joined: Sep 2008
Posts: 10
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From: Dubai
ecu flash cable
hi from where i can buy the ecu flash cable
[QUOTE=EFIxMR;3090406]This is a beginners tutorial I wrote to help people get started on ECUflash. Please feel free to correct me if you see any blatent mistakes.
Here's a picture of the ECUFLASH cable.
[QUOTE=EFIxMR;3090406]This is a beginners tutorial I wrote to help people get started on ECUflash. Please feel free to correct me if you see any blatent mistakes.
Here's a picture of the ECUFLASH cable.