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

fostytou · Feb 17, 2009, 08:16 AM

Quote:

Originally Posted by 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. 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.

Can't you just use the voltages in the MAP Comp tables that you adjusted when installing it?

dudical26 · Feb 17, 2009, 09:26 AM

Quote:

Originally Posted by fostytou

Can't you just use the voltages in the MAP Comp tables that you adjusted when installing it?

Those correlate voltage to a 0 to 255 scale that the ECU uses, not PSI, if I recall.

dudical26 · Feb 17, 2009, 09:28 AM

Richard - Are you able to make an image with the Adjustment Pots in any position you like?

If so do you think you can send me a zip file with an image of a pot at 5%, 10%, 15% ... 100%

I am going to try and make the excel sheet so that once the user selects the value they would like to use to create their Meth curve, it will show them an image of how they should adjust the POTS to achieve their goal.

Turbo Kyle · Feb 17, 2009, 09:32 AM

Holy hell thats freakin saweeeet!

Richard L · Feb 17, 2009, 11:39 AM

Quote:

Originally Posted by 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. 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.

Assumming a 3 bar (43.5psi) map sensor has full scale outout of 5V. 1 psi = 0.115 volt. Your calculation is fine.

Can you tell me what is 1.661538 representing?

- 1 bar = 0.9869 atmosphere bar = 14.5037 psi
- 1 atmosphere = 1.01325 bar = 14.695 psi

Richard

Richard L · Feb 17, 2009, 11:44 AM

Quote:

Originally Posted by dudical26

Richard - Are you able to make an image with the Adjustment Pots in any position you like?

If so do you think you can send me a zip file with an image of a pot at 5%, 10%, 15% ... 100%

I am going to try and make the excel sheet so that once the user selects the value they would like to use to create their Meth curve, it will show them an image of how they should adjust the POTS to achieve their goal.

Yes I can, what about 10%? You may have a problem here. The electrical rotation span is different on all makes and models of potentiometer. This is the reason why the HFS-6 works from mid-point. (12-clock).

Richard L · Feb 17, 2009, 11:48 AM

Dudical,

I am unable to open the zip file. May be my winzip is too old. It is OK to post uncompressed file these days, download speed is no longer a problem.

dudical26 · Feb 17, 2009, 12:04 PM

Quote:

Originally Posted by Richard L

Assumming a 3 bar (43.5psi) map sensor has full scale outout of 5V. 1 psi = 0.115 volt. Your calculation is fine.

Can you tell me what is 1.661538 representing?

- 1 bar = 0.9869 atmosphere bar = 14.5037 psi
- 1 atmosphere = 1.01325 bar = 14.695 psi

Richard

Thanks,

I adjusted the spreadsheet to reflect these changes.

dudical26 · Feb 17, 2009, 12:08 PM

Quote:

Originally Posted by Richard L

Yes I can, what about 10%? You may have a problem here. The electrical rotation span is different on all makes and models of potentiometer. This is the reason why the HFS-6 works from mid-point. (12-clock).

Speaking specifically of the POTS on the HFS-6. Is the rotation span not linear?

Meaning the 12-clock mark is 50% and the 7-clock mark is 0% and finally the 5-clock mark is 100%

For example referring to boost comp would 7-clock be 0 volts, 9-clock = 1 volt, 11-clock = 2 volt, .... 5-clock = 5 volts.

Richard L · Feb 17, 2009, 12:11 PM

Forgot the voltage:

- 1 bar = 0.9869 atmosphere bar = 14.5037 psi = 1.668V
- 1 atmosphere = 1.01325 bar = 14.695 psi = 1.689V

0 psi boost (gage) = 1 atm = 1.689V.

dudical26 · Feb 17, 2009, 12:14 PM

Quote:

Originally Posted by Richard L

Dudical,

I am unable to open the zip file. May be my winzip is too old. It is OK to post uncompressed file these days, download speed is no longer a problem.

Hmm, I compressed the image as EvoM does not let me host .xls file.

I have attached 2 files. One is .zip with NO COMPRESSION and the other is a text file of the spreadsheet. In order to view the text file version you will need to simply rename the extension from .txt to .xls

Let me know if this works.

-------update-------
Files removed, new files will be uploaded later in the thread.

scheides · Feb 17, 2009, 12:41 PM

OMG I just saw this and cruised through the entire thread. WOOWOO! No more wiring nightmares! I am in LOVE with the new design, I think RJ45's are the way to go; the control unit is not going to be mounted anywhere that will see moisture or too much vibration anyways (well it shouldn't anyways).

Tons of questions!
-Can I help with an upgrade path from HFS-1 users? I would love to upgrade. I'm thinking it'd be easy to splice the existing harness wires into RJ45 plugs, or perhaps colored leads provided from aquamist? Then add the new unit to replace the flow sensor and on/off valve and we'd be in good shape.
-Where do the failsafe wires get wired to, and how are they defined? I'm thinking of my map-switching setup....if one of the leads to the ECU harness will have 0-5v output linked to the failsafe we'd be golden.
-What's the very rough ETA of bringing this kit to market?

Richard L · Feb 17, 2009, 03:13 PM

My answers in Green...

Quote:

Originally Posted by scheides

OMG I just saw this and cruised through the entire thread. WOOWOO! No more wiring nightmares! I am in LOVE with the new design, I think RJ45's are the way to go; the control unit is not going to be mounted anywhere that will see moisture or too much vibration anyways (well it shouldn't anyways).

Tons of questions!

-Can I help with an upgrade path from HFS-1 users? I would love to upgrade. I'm thinking it'd be easy to splice the existing harness wires into RJ45 plugs, or perhaps colored leads provided from aquamist? Then add the new unit to replace the flow sensor and on/off valve and we'd be in good shape.
I need to give this a serious thought. At present, I am setting up the production tools for the HFS-6, I can do with more hours in a day. The existing wires will not go into the RJ45 connector, they are slightly too thick.

The v8/v9 gauge is modified for the v10, both elctricially and mechanically. You may need to return the guage to be modified - not too bad, but workable. We need to change the 8-core cable to a thinner type.
Adding the valve and flow sensor is quite straight forward.

-Where do the failsafe wires get wired to, and how are they defined? I'm thinking of my map-switching setup....if one of the leads to the ECU harness will have 0-5v output linked to the failsafe we'd be golden.
The yellow connector (to ECU) contains the map switch wire as well as the relay outputs (3-wire).

-What's the very rough ETA of bringing this kit to market?
We plan to ship by March 15th. Depending on the new Aquatec pump meeting the delivery date.

Richard L · Feb 17, 2009, 03:27 PM

Quote:

Originally Posted by dudical26

Hmm, I compressed the image as EvoM does not let me host .xls file.

I have attached 2 files. One is .zip with NO COMPRESSION and the other is a text file of the spreadsheet. In order to view the text file version you will need to simply rename the extension from .txt to .xls

Let me know if this works.

I didn't realise EVOM host files. They can show spread sheets?

It works, change .txt to xls. Very good work I froze the heading, it reads better.

aqmist · Feb 17, 2009, 05:09 PM

This may not come across to everyone's liking, but and upgrade path may not be advisable.........it may put Richard at a disadvantage to make the 6 come out smothly.

IMO sell the HFS-5 and use the funds from the sale to help defer the cost of the purchase of the 6 OR keep the 5 as its already installed and good part of the benefit of the 6 is ease of install = this part of the 6 is made moot for the most everyone with the 5 already installed. This does not take into account some users looking for the adjustability that the 6 has over the 5. ................IMO owners of the 5 that need the functionality of the 6 are much fewer = these few could delay the 6 if Richard tries to get an upgraded path together for these few 5 owners.

The 6 is a big new release and like some software an upgrade is not going to cut it..........to have released the 6 without the Rj45 jacks so 5 users could swap junction boxes kills a natural progression that was needed.

If anyone were thinking about selling a 5 I would like to offer to help, in that SRT-4 owners are cheap bastards and some might be happy to get into a 5 as less then new retail. No promises and not looking for money but I can help to spread the word.

Not speaking on behalf of Aquamist....Richard is his own man, I'm just stating an opinion as an observation.