Aquamist HFS-5 will be replaced by HFS-6 in2009

[hawaiian_evo]

i was just about to order the hfs-5 but now im gonna wait... hopefully a release date is in the works i get tuned ending of march

[Richard L]

Dudical,

"Boost comp" acts very similar to IDC threshold potentiometer. Adjustment range is 0-5V. This voltage coincides wrth most MAP sensor output voltage. The default setting from factory is 2.5V (12'oclock).

When the MASP sensor volatge reaches this voltage, the compensation starts to add to the flow.

Comp % added to the main flow :
0 to 5V = 0-20%
2.5V to 5V = 0-10%
etc.

[dudical26]

Richard-
So in order to completly disable boost comp you would turn it full clockwise correct? Shouldn't it be set like this from the factory so that it is like the hfs5 with no boost comp?

Just to check my understanding if you set it to 2.5v on a 3bar sensor which can measure about 30psi(gauge pressure) then at 15psi it willl start to add compensation such that by 22.5 psi it has added 5% compensation and by 30 psi it has added 10%, is this correct?
When I get back to work on Monday I will build a spreadsheet that will allow you to enter your pot values and then it will display your personal meth curve. That way people can see visually what all the adjusments do.

[Richard L]

Originally Posted by dudical26

Richard-
So in order to completly disable boost comp you would turn it full clockwise correct? Shouldn't it be set like this from the factory so that it is like the hfs5 with no boost comp?

Just to check my understanding if you set it to 2.5v on a 3bar sensor which can measure about 30psi (gauge pressure) then at 15psi it will start to add compensation such that by 22.5 psi it has added 5% compensation and by 30 psi it has added 10%, is this correct?
When I get back to work on Monday I will build a spreadsheet that will allow you to enter your pot values and then it will display your personal meth curve. That way people can see visually what all the adjusments do.

Yes, that is one way or you don't connect the H6 to the MAP sensor. Your deduction is pretty accurate. Obviously the 20% span can be changed by us. Perhaps I should add two extra potentiometers (as in the IDC channel), but room is limited at the moment. Perhaps for the HFS-7?

The HFS-6 will have a different pump with 160psi line pressure, made by Aquatec, USA. Boost compensation is not as important in this respect. But useful to bump up the fluid flow during boost ramp a little.

Looking forward to your formulated spread sheet visual.

[hawaiian_evo]

I Pmed richard and there might be a possible group buy with a special discount off the hfs-6..

i think 20 units will be available at the gb price ....

If you want richard maybe we can start a gb thread to get this thing rolling

thumbs up to aquamist

[Richard L]

I will certain get one organised very soon. It will be on www.waterinjection.info forum. Try to make it more accessible to all.

[Evoryder]

I might have to invest and re-do my entire setup

[esevo]

Richard always uses the group buy for introducing a new system. This is always the best time to buy a kit! Never again will you see prices on this kit as good as the group buy!!!

Expect a minimum of 3 weeks until the first kit can even be bought. As a manufacture ERL has to buy very high number of parts in order for; 1. demand 2. price 3. reserves 4. support. Once all is in stock, sales should start.

Evan Smith

[sspaladin28]

I'm in for GB for sure. Ill try to follow this thread as well as the link mentioned by Richard

[Q8_EVO]

Im in for a GB.

[hawaiian_evo]

alright guys cant wait to get this started im deff on the gb

[Richard L]

Quick summary of the functions of the HFS-6's main control panel



Jumper links (default):
- System is triggered by Fuel IDC % (second from left)
- Spare jumper link is in parked position
- Water injection is enabled. Unlink for "dry-run" test

Three onboard LEDs
- Green LED: Fuel idc detection. Grows brighter as IDC increases
- Amber LED: The trigger point is reached, water injection commences
- Red LED: The water injection has almost reached its full flow.

Potentiometers to manipulate the flow curve.
(Adjustment is optional - preset at 12 o'clock)
- THRES ADJ: Set triggering point to start injection. Default: 42% IDC
- IDC TRIM: Add or subtract IDC% from the starting point. Default: IDC-in = IDC-out
- IDC gain: Alter ramp rate of the IDC-out relative to the IDC-in Default: 1:1 ratio.
- BOOST COMP: Increase the flow to offset the manifold pressure. Default: 2.5V
- FLSF SENS: Failsafe sensitivity/response to over or under flow spikes. Default: 400mS
- FLSF RST: Failsafe reset time after trigger. Default: 3 seconds
- DIM ADJ: Gauge brightness for night driving: Default: 50%

[Evoryder]

The potentiometers are pretty straight forward. I'm really more interested/excited

[Richard L]

The main reason for introducing the HFS-6 is to simplify installation and user accessibility without complicating things.

I don't know where we can go from here- Users will probably tell me in a few months time.

[dudical26]

Richard -

In working on the spreadsheet to help illustrate how all the settings change the flow curve I have run into a question.

I am trying to determine the equation to calculate volts from PSI assuming a 3 bar map sensor (like the JDM map sensor). I used data values from your DDS3 v.10 instructions to work backwards to get an equation for the line of the data points when graphed. However, this gives me Volts = PSI * .115385 + 1.661538 which means that 32.4 psi = 5.4 In reality it should equal 5 volts though, right? Do you have an equation that I can use to calculate volts from PSI or any tips on what I am doing wrong here.

Man I wish I paid more attention in high school math class.

Attached is what I have so far.(see newer posts) Although the PSI to Volt equation is not right yet the spreadsheet still works pretty much. Take a look, it gives a nice visual to the settings. I am going to play with the spraedsheet more to make it easier to use and nicer to look at but the concept is there.