Greetings all -
I searched the Kpro help file and the forums, but didn't seem to get any valid hits. So don't kill me on my first post but the question is:
Can Kpro calculate and log acceleration and horsepower? It seems like all the variables are logged - you know vehicle speed and have a time base so acceleration should just be a calculation. Also, once you know acceleration and a few other variables such as vehicle weight, etc. approximate horsepower is just another calculation away.
Seems like both of these would be good tools to help tuning, determine shift points, etc. If these functions are in there, how can I access them? If they are not in the software, any chance of adding them to future versions?
Thanks
Logging / Calculating Acceleration and HP?
Logging / Calculating Acceleration and HP?
Corey
E85 fueled Acura RSX-S Turbo w/ KPro
∙ 12.5:1 CR ∙ Precision Billet 5857E @ 15psi ∙ OBX Sidewinder ∙ ID 1000's ∙ ACT XTSS ∙ OBX LSD ∙ Custom 3" Magnaflow SS Exhaust
E85 fueled Acura RSX-S Turbo w/ KPro
∙ 12.5:1 CR ∙ Precision Billet 5857E @ 15psi ∙ OBX Sidewinder ∙ ID 1000's ∙ ACT XTSS ∙ OBX LSD ∙ Custom 3" Magnaflow SS Exhaust
Thanks for the quick reply. I realize there is no accelerometer for a direct g-reading but I was curious if the Kpro could perform the calculation.
You already have speed input from the VSS, and the graphs have time as the X axis, so acceleration is just the difference in speed at two separate points in time - say two separate frames of data. Or, as you point out, acceleration is actually the slope of the line on the VSS / time graph. But with a true acceleration vs. time graph, it would help pin down the ideal shift points for each gear.
Of course, it wouldn't take into account wheel spin or errors in initial VSS or time readings, so maybe that would limit usefullness.
Just kicking around some ideas for useful data that seems to be recorded in the data log, but not actually calculated or displayed. (it's my day job!)
PS - is there any way to access a table of raw sensor data that is used to generate the graphs?
You already have speed input from the VSS, and the graphs have time as the X axis, so acceleration is just the difference in speed at two separate points in time - say two separate frames of data. Or, as you point out, acceleration is actually the slope of the line on the VSS / time graph. But with a true acceleration vs. time graph, it would help pin down the ideal shift points for each gear.
Of course, it wouldn't take into account wheel spin or errors in initial VSS or time readings, so maybe that would limit usefullness.
Just kicking around some ideas for useful data that seems to be recorded in the data log, but not actually calculated or displayed. (it's my day job!)
PS - is there any way to access a table of raw sensor data that is used to generate the graphs?
Corey
E85 fueled Acura RSX-S Turbo w/ KPro
∙ 12.5:1 CR ∙ Precision Billet 5857E @ 15psi ∙ OBX Sidewinder ∙ ID 1000's ∙ ACT XTSS ∙ OBX LSD ∙ Custom 3" Magnaflow SS Exhaust
E85 fueled Acura RSX-S Turbo w/ KPro
∙ 12.5:1 CR ∙ Precision Billet 5857E @ 15psi ∙ OBX Sidewinder ∙ ID 1000's ∙ ACT XTSS ∙ OBX LSD ∙ Custom 3" Magnaflow SS Exhaust
http://forums.clubrsx.com/showthread.php?t=292428
This is a link to a thread on clubrsx. We have two methods for producing acceleration graphs (mirrors the torque curve). One is my system and the other is one made by Theta. Both systems use the same principals of a datalog's frames to generate acceleration curves. Many people have used my system to do VTC tuning. Theta's is fairly new to the scene but is promising, however we disagree on a few things in regards to data collection. Ignition tuning may potentially be tunable, but I believe that a dyno is quite a bit safer given that picking the wrong cam angle generally doesn't put undo stress on your engine like overadvancing ignition.
One thing is for sure, we can pick cam angles given fairly well tuned base maps. I still suggest the dyno for ignition tuning -- it's good to have the ability to monitor things closer since you're not watching the road. I have used my program/system to generate a very nice N/A and BOOST vtc tune for my rsx, both when N/A and supercharged.
It is possible, but realize a dyno is safer, more accurate, and takes less time to complete.
If you feel you are up to the task, http://chewies.net/~raz/tuning/razdyno/ is the link to my downloadable system that I've used various revisions of with great success.
This is a link to a thread on clubrsx. We have two methods for producing acceleration graphs (mirrors the torque curve). One is my system and the other is one made by Theta. Both systems use the same principals of a datalog's frames to generate acceleration curves. Many people have used my system to do VTC tuning. Theta's is fairly new to the scene but is promising, however we disagree on a few things in regards to data collection. Ignition tuning may potentially be tunable, but I believe that a dyno is quite a bit safer given that picking the wrong cam angle generally doesn't put undo stress on your engine like overadvancing ignition.
One thing is for sure, we can pick cam angles given fairly well tuned base maps. I still suggest the dyno for ignition tuning -- it's good to have the ability to monitor things closer since you're not watching the road. I have used my program/system to generate a very nice N/A and BOOST vtc tune for my rsx, both when N/A and supercharged.
It is possible, but realize a dyno is safer, more accurate, and takes less time to complete.
If you feel you are up to the task, http://chewies.net/~raz/tuning/razdyno/ is the link to my downloadable system that I've used various revisions of with great success.
2003 black RSX type-s / jrsc @ 12psi / methanol injection / aftercooled