Customizing the DBW Throttle mapping
#121
Tut just curious, but have you looked into an electronic boost controller that reduces boost at higher rpms or are you trying to this with just the throttle plate? I guess not having one more thing to screw with is good..
One thing I never quite understood with all these classes is how they can clearly enforce HP limits/etc without cheating.. These days it'd be easy at the flick of a switch to easily change your boos/fuel/timing maps. I guess there's some level of honesty required..
One thing I never quite understood with all these classes is how they can clearly enforce HP limits/etc without cheating.. These days it'd be easy at the flick of a switch to easily change your boos/fuel/timing maps. I guess there's some level of honesty required..
#122
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Tut just curious, but have you looked into an electronic boost controller that reduces boost at higher rpms or are you trying to this with just the throttle plate? I guess not having one more thing to screw with is good..
One thing I never quite understood with all these classes is how they can clearly enforce HP limits/etc without cheating.. These days it'd be easy at the flick of a switch to easily change your boos/fuel/timing maps. I guess there's some level of honesty required..
One thing I never quite understood with all these classes is how they can clearly enforce HP limits/etc without cheating.. These days it'd be easy at the flick of a switch to easily change your boos/fuel/timing maps. I guess there's some level of honesty required..
#123
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After thinking about Tut's issue some more, I really think that the throttle mapping will be pretty simple. I don't think it's going to require a finely tuned "curve" in the throttle plate mapping at all. I think it's just going to require a flat / constant restriction starting around 3K RPMs. Basically, you need to create a restriction that limits air flow to some fixed number of liters per minute, regardless of RPM. You just need to determine how much throttle restriction is required to do that.
#124
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After thinking about Tut's issue some more, I really think that the throttle mapping will be pretty simple. I don't think it's going to require a finely tuned "curve" in the throttle plate mapping at all. I think it's just going to require a flat / constant restriction starting around 3K RPMs. Basically, you need to create a restriction that limits air flow to some fixed number of liters per minute, regardless of RPM. You just need to determine how much throttle restriction is required to do that.
#125
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Originally Posted by Gernby' timestamp='1469024274' post='24020836
After thinking about Tut's issue some more, I really think that the throttle mapping will be pretty simple. I don't think it's going to require a finely tuned "curve" in the throttle plate mapping at all. I think it's just going to require a flat / constant restriction starting around 3K RPMs. Basically, you need to create a restriction that limits air flow to some fixed number of liters per minute, regardless of RPM. You just need to determine how much throttle restriction is required to do that.
I think I mentioned it earlier in the thread, but my approach would be to restrict the throttle to something like 20% max, then do some WOT datalogs in 3rd gear. If you want to email the datalogs to me, I'll run them through my software dyno.
#127
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Try to find a flat road where you can do repeatable pulls in the same direction from the same spot without attracting too much attention to yourself. If you can do 3-4 pulls with each throttle setting, that would be good. Also, record the datalog on the FlashPro itself, so that it has the highest possible sample rate.
#128
Yup I think this is the answer. Of course it takes some physics to do the calculations. Merely dropping the throttle % steadily is a much more brute force/non intellectual approach that also should work.
#129
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Try to find a flat road where you can do repeatable pulls in the same direction from the same spot without attracting too much attention to yourself. If you can do 3-4 pulls with each throttle setting, that would be good. Also, record the datalog on the FlashPro itself, so that it has the highest possible sample rate.
#130
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Originally Posted by Gernby' timestamp='1469024274' post='24020836
Basically, you need to create a restriction that limits air flow to some fixed number of liters per minute, regardless of RPM. You just need to determine how much throttle restriction is required to do that.