Using HP tuners timing to reduce power for traction
I made it home for a short amount of time this weekend to do some testing. My first try worked, it felt like it took about 75 horsepower away but would still spin sometimes. So I reduced timing another 5 degrees and started down lower in the rev range and bam its working (I know, big surprise).
I'm going to have to datalog and bring some timing back in a few spots where it just lays over but this is going to help tremendously. It's still plenty responsive but just kindof sits at the limits of the tires.
I will also datalog during the autocross runs because I am sure the airport runway will be different than the highway but atleast I will have some data to go on.
I forgot to screenshot the timing maps but I will post them when I get back home for anyone who cares.
I'm going to have to datalog and bring some timing back in a few spots where it just lays over but this is going to help tremendously. It's still plenty responsive but just kindof sits at the limits of the tires.
I will also datalog during the autocross runs because I am sure the airport runway will be different than the highway but atleast I will have some data to go on.
I forgot to screenshot the timing maps but I will post them when I get back home for anyone who cares.
Please post the text version of your arduino code so we can help improve it's ability to function. Some of us are able to help. Measure driveshaft speed, measure front wheel speed and calculate the % difference. I have done that with Megasquirt for boost/traction control, but the math is done by the tuner studio software. Result is no spinning off the line or lifting of the front end during launch.
Controlling the relay is easy with several $3 MOSFET driver board. I think it would be easier to add a series of relays with multiple resistors to gradually reduce timing. The multiple resistors would substitute for the inlet air temp sensor. HP tuners files have a timing modifier table based upon IAT. In theory it's not that difficult. Just need to prove it by writing some code and testing it. I have done similar things like lighting multiple LED's based upon boost.
Controlling the relay is easy with several $3 MOSFET driver board. I think it would be easier to add a series of relays with multiple resistors to gradually reduce timing. The multiple resistors would substitute for the inlet air temp sensor. HP tuners files have a timing modifier table based upon IAT. In theory it's not that difficult. Just need to prove it by writing some code and testing it. I have done similar things like lighting multiple LED's based upon boost.
Please post the text version of your arduino code so we can help improve it's ability to function. Some of us are able to help. Measure driveshaft speed, measure front wheel speed and calculate the % difference. I have done that with Megasquirt for boost/traction control, but the math is done by the tuner studio software. Result is no spinning off the line or lifting of the front end during launch.
Controlling the relay is easy with several $3 MOSFET driver board. I think it would be easier to add a series of relays with multiple resistors to gradually reduce timing. The multiple resistors would substitute for the inlet air temp sensor. HP tuners files have a timing modifier table based upon IAT. In theory it's not that difficult. Just need to prove it by writing some code and testing it. I have done similar things like lighting multiple LED's based upon boost.
Controlling the relay is easy with several $3 MOSFET driver board. I think it would be easier to add a series of relays with multiple resistors to gradually reduce timing. The multiple resistors would substitute for the inlet air temp sensor. HP tuners files have a timing modifier table based upon IAT. In theory it's not that difficult. Just need to prove it by writing some code and testing it. I have done similar things like lighting multiple LED's based upon boost.
Bowtie, you can also use the torque management tables to soften the "hit" so to speak when you transition on and off the throttle if that's where you're primarily losing power.
If you populate them more aggressively than stock you may be able to run more timing in the main table to have the power but artificially bring it in a bit slower to try and build up traction with a higher wheel speed and lessen the hit on the tires
If you populate them more aggressively than stock you may be able to run more timing in the main table to have the power but artificially bring it in a bit slower to try and build up traction with a higher wheel speed and lessen the hit on the tires
The reduced timing helped tame the thing down quite a bit, now I just need to learn how to drive.
You can hear it cutting out a bit leaving the line in second gear, it's because the timing was at like 10 degrees. Logging delivered torque showed it to be about 125 lb-ft down from my normal tune.
You can hear it cutting out a bit leaving the line in second gear, it's because the timing was at like 10 degrees. Logging delivered torque showed it to be about 125 lb-ft down from my normal tune.
