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I need to be able to control boost based on gear and I really do not want to spend $500 to do it. Decided to design one based on the Arduino.
Amazingly, there is not a lot of examples on line but I did find a guy who did one that seems fairly solid. I will be using some of his design. Here is a link:
My plan is to design a basic open loop controller first, then add "by gear" to the the open loop, and finally closed loop functionality.
I plan on using much of Tom M'Guinns speedometer calibration work (see here) along with tach signal (another interesting component) to calculate gear selection. I also will be incorporating a shift light also
A project like this is on my list as well but I haven't been able to get to it yet.
Have you considered using a more capable processor? The Teensy 3.1 has a Cortex M4 processor, 64k RAM/256k flash, and you can develop code for it using the Arduino IDE.
Add the TPS signal to that mix and get some more drivability out of the car.
Since the TPS is limited (idle, PT, or WOT) not sure it will help me. How would you see using the TPS signal as beneficial?
Originally Posted by Dare
A project like this is on my list as well but I haven't been able to get to it yet.
Have you considered using a more capable processor? The Teensy 3.1 has a Cortex M4 processor, 64k RAM/256k flash, and you can develop code for it using the Arduino IDE.
I think the Arduino should be sufficient for the project.
Originally Posted by reno808
Will you have any safety like the other EBCs out there?
By using the PT and WOT. you can adjust boost by throttle.
for example running on for the daily 10psi then you add 80%=15psi 100%=18psi
Useful for the track.
If you get the idea.
I get the idea Just not sure about its real world usefulness. Is anyone doing this? Any of the track guys with standalones?
I am open to adding the feature and it would not be overly difficult but I want to keep things as simple as possible. I need to be convinced. When I am in boost I do not spend much time in PT.
IICR patrick might be or has done it.
use is for twisty tracks where you can't full throttle out of corners but can full throttle on straights.
one that might be useful for you for drags is a feature the eboost2 has.
Boost by RPM. helps stop wheel spin and achieve more boost higher rpm to get quicker trap speeds ect.
Example:
4000rpm 15 psi
4500rpm 16.5 psi.
5000rpm18 psi
If you can get boost by gear and by rpm. you should be able to dial it in so each time you shift gears you keep traction and gain more power while rising up in rpm.
IICR patrick might be or has done it.
use is for twisty tracks where you can't full throttle out of corners but can full throttle on straights.
one that might be useful for you for drags is a feature the eboost2 has.
Boost by RPM. helps stop wheel spin and achieve more boost higher rpm to get quicker trap speeds ect.
Example:
4000rpm 15 psi
4500rpm 16.5 psi.
5000rpm18 psi
If you can get boost by gear and by rpm. you should be able to dial it in so each time you shift gears you keep traction and gain more power while rising up in rpm.
Appreciate the input. Definitely can see the usefulness of boost by rpm.
Boost by TPS is common on factory installs and on high end aftermarket race ECU's like MOTEC. It makes the throttle much more linear and provides much less of a rubber band feel. I have no idea how fast of a driver you are but if you are actually at the limit it will make you faster - especially when you find yourself in the middle of some downpour in the middle of a race or some other especially tricky condition where having basically a light switch of a rubber band just slows you down. Or if you have a track where there are really long sweepers. The throttle is just more precise and you basically eliminate the transient rubber banding on the input to the target.
Boost by RPM can also help you make more area under the curve by backing out boost at (what would be) peak BMEP but keeping it elsewhere in the power band.
Since the TPS is limited (idle, PT, or WOT) not sure it will help me. How would you see using the TPS signal as beneficial?
I use the factory TPS sensor with my standalone systems and the output is 0-5V. Couldn't you just tap into this and use the voltage signal / range to control your boost?
08-17-2014, 03:55 PM
Arduino Electronic Boost Controller Project
Just not sure about its real world usefulness. Is anyone doing this? Any of the track guys with standalones? 