rbeezly
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Hey Moe,
I am considering purchasing the Aquamist HFS-4 and I see you have some experience with the kit. My two questions and concerns are as follows, and I hope you can help provide me some answers.
I will be running a cobb accessport with a 93 octane file, AND a custom tune for the water meth setup (more timing, boost, etc..) Does the HFS-4 have a hard On/OFF setting that will enable me to run the standard 93 tune without interference from the WMI failsafe?
IS the Aquamist Failsafe an independent stand alone feature that is triggered from within the HFS Controller? Having a proper fialsafe is crucial to me, however right now COBB does not have WMI mapping built in, so any failsafe measures would have to be outside of COBB control. Thanks!
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Hello mate,
There are jumpers in the control box which you can tweak if you plan to switch the system on/off. The default position means if the system is switched off or out of fluid then it cuts boost to 1bar. Unlinking this jumper means you can switch the system on or off as needed.
Apart from the above failsafe (which can be overridden), the other standard failsafe in the aquamist is based on flow. once calibrated, it means if your flow goes outside of the expected range (too much flow from a leak, or too little flow from a blockage) the failsafe is triggered. again, because you set the parameters, you can max these out and it will never trigger, or set them very tight in which case it might trigger unnecessarily due to a random increase decrease in flow (eg air bubble). You can tweak the delay for failsafe activation, to avoid very short false positives kicking in the failsafe.
You can also hardwire an external sensor into the system (e.g., an EGT sensor, a lamda, a rectal thermometer - literally anything) and set it as an auxiliary failsafe in case there are any other conditions you want to use to trigger failsafe. I haven't done this and i imagine it would need some work in terms of setting up and configuring, but the option is there.
It is honestly the most complete WMI kit on the market, and always has been - it's fiddly and complex, but once dialed in properly it is excellent.
PS- make sure you buy the right version for your car. The one for US spec is different from ROW spec due to the fueling (4 injectors vs 8 injectors).
Hope this helps - good luck!
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