Aquamist HFS-3 system for 2010 ..... "Q and A"

[Raceready]

Originally Posted by Howerton Engineering

Yes, you can either turn the IDC threshold all the way right as you suggested, or you can just turn the unit off on the gauge face as well. This will enable the failsafe unless you temporarily change a jumper on the board.

It doesn't matter what cylinder you wire the IDC signal to, unless there is something special about your car.

Great, thanks a lot for the information. I didn't know you could just turn it off on the gauge.

[Richard L]

Mr reply in green...

Originally Posted by proz07

1. good to hear ill keep that in mind later on down the road if needed

2. exactly the reason i want to use IDC not just BOOST and the HSF-3 just simplifies this

Good to know

3. yes currently the stock injectors later upgradding to 4x 1000cc secondaries but keeping the 550 or equivilant primaries so it should work out just right. and like i said ill be dropping the secondary transition % if i need to later after testing the system on the current safe tune on straight pump.

This seems to work out just perfect due to the smallish primary. This means you are able to go dwon as low as 22% form the secondary.

one other question though was the potentiometer for threshold. being that everyones IDC is different pending rpm and injector size and inj cycle style (batch,sequential, semi-seq) whats the reference miliseconds for the threshold settings? i.e. 12% equals ?? miliseconds 42%, 72% equals what milisecond on time?

The "RPM, milli-second, etc" calculation has already taken care of. Just dial in the %DC on the trimmer. (12% to 72%)

good info thanks

z

[proz07]

excelent support from aquamist directly on this site as well as the wiring diagrams for the few wires that need to be connected

thanks

z

[jmargo]

This is a question in regards to extending the two cables that connect to the PVM. I can cut/splice to add length or put an extention coupling at the end and run additional cable. However, is the flow sensor set to length and looking for a specific resistance/ohm number ? If I extend it will the readings be off ?

Thanks

[Richard L]

No problem extending the wires.

Richard

[jmargo]

Originally Posted by Richard L

No problem extending the wires.

Richard

Thanks....just a quick trick to pass on about running the wires. If you put heat shrink around the ends it keeps the tab from breaking as you pass it through confined spaces. Once its done just cut it off with a razor.

[Richard L]

Please explain again, I didn't quite get it

[gluis]

Hello everyone,

I have a question. Where the failsafe is connected and how it control my timing/boost whenever I'm out of water/methanol mix, or any other fault condition in the system?

My car is a modified 07 STI, and I'm looking into H2O/Meth injection for the first time. Trying to learn as much as possible before making a decision.

Thanks and best regards,

Guillermo

[gluis]

Hello again,

What's the size of the gauge? 52 or 60 mm

Thanks,

GS

The gauge is 52mm