part of MembersPage/DTechnologies/Hayabusa project
Idle Control
As I start building my config file I've realized that I don't have a good plan in place for automatic idle control.
- From the factory, the Hayabusa comes with a manual fast idle lever which operates a mechanism on the throttle bodies which opens the throttle plates enough to bring the idle up to 3250rpm. This is adjusted with a set screw next to the idle adjust set screw.
- I just remembered that this mechanism isn't as on/off as I thought. It's possible to vary the fast idle (like a choke) speed by not pulling the lever all the way. I think it's possible to connect a stepper or servo to pull a cable attached to the existing mechanism. If I'm not mistaken, this would act exactly the way I'd need for fast idle control.
- In the interest of keeping things simple (and getting my bike on the road sooner), I'm going to go with the solenoid fast idle. I will still research out implementing an idle control valve and make sure the hardware will run one so that I can update for next year.
This still leaves the question of wether or not to use ignition idle control.
- You should prolly look at some of the other Suzuki's they have a servo controlled plate behind the manual controlled ones for the EFI manaement. Specifically GSXR versions. I know this for fact as I have 3 sets..
- I believe all newer GSXRs have dual butterfly valves. Unfortunately all I have are the stock throttle bodies to work with.
- Is there documentation here in the wiki as to all the IAC settings in relation to ON/OFF config? I'm likely missing something but based on the documentation that I have found, the only way to implement what I'd like to do is to set it up for PWM with 00 duty cycle and FF duty cycle.
- OR...is there a way to simply map the 'fastidle' to an output? This would be super easy.
- on/off type fastidle solenoid is supported.
- set IAC control type to ON/OFF (bit 3=0 in iac_conf) and fastidle temp to proper value