Carburetor Tuning Program - Interested?
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 2,961
Likes: 1
From: Sealy Texas
Cruise-In III Veteran
Re: Carburetor Tuning Program - Interested? (427V8)
Well I do have some ideas about how to capture the data and process it. I've been writing signal processing and analysis software for about 15 years and if nothing else have ideas :smash:
I cant say I invented these ideas, they just kinda forced themselveds onto me over the years.
0. Seperate Data and code
1. sample as fast as you can.
2 sample as accurately as you can
3, save everything.
4 process the data as late as possible ( lazy evaluation )
5. assume the user is an idiot and don't confuse them with the details
6. the right way of presenting the data and the almost right way is as different as lightining and a lighting bug ( apoligies to Mark Twain )
I cant say I invented these ideas, they just kinda forced themselveds onto me over the years.
0. Seperate Data and code
1. sample as fast as you can.
2 sample as accurately as you can
3, save everything.
4 process the data as late as possible ( lazy evaluation )
5. assume the user is an idiot and don't confuse them with the details
6. the right way of presenting the data and the almost right way is as different as lightining and a lighting bug ( apoligies to Mark Twain )
Those are general ideas a more specific one is that all the data needs to be kept together, I'd make a class that held one set of data ( time, temp, o2, airflow, tps, rpm, etc) and then just start sampleing and creating those objects as fast as you can, all held of course in a containner of some sort, prolly a linked list. then you could have visiters that could cruse the list and massage the data however you want.
the best part is it becomes very easy to add functionality since all the data is in one spot. VB may gag a bit on creating objects fast enough but I doubt it.
Can you use a memory mapped file in VB? It make things fast in VC :D
Can you use a memory mapped file in VB? It make things fast in VC :D
LOL probably more that you wanted, sorry I get excited about software
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 2,961
Likes: 1
From: Sealy Texas
Cruise-In III Veteran
Re: Carburetor Tuning Program - Interested? (Frank75)
I suspect that some sort of steady-state might be reached :confused: depending on how coarse each cell was. You'd probably have to build a test unit to see. My comment was aimed towards the concept of using an integrator to update a slow-changing BLM-type number, but just to keep track of sensor output. Even when bouncing around on each side of stoich. the average tended to move in the right direction.
Yeah - I was just thinking that some sort of TPS information would make it easier to figure out which carb circuit needed attention. Maybe that part of the system could be an "option" with a software switch if the user decided to implement a TPS sensor.
Instructor
Joined: Jun 2002
Posts: 191
Likes: 0
From: Hillsboro OR
Re: Carburetor Tuning Program - Interested? (Ken73)
Ken,
Great idea! How about making it work with USB? There's a chip out there that makes it pretty easy. Check out the latest edition of Nuts and Volts magazine. I would be happy to volunteer my hardware design and prototype expertise if you want some help.
By the way, I still haven't got my 73 working quite right with the 1227747. I rebuilt the engine "AGAIN" in November and got everything going during Thanksgiving, but haven't had time to work on it since. Love the winaldl softwre!
John.
Great idea! How about making it work with USB? There's a chip out there that makes it pretty easy. Check out the latest edition of Nuts and Volts magazine. I would be happy to volunteer my hardware design and prototype expertise if you want some help.
By the way, I still haven't got my 73 working quite right with the 1227747. I rebuilt the engine "AGAIN" in November and got everything going during Thanksgiving, but haven't had time to work on it since. Love the winaldl softwre!
John.
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 2,961
Likes: 1
From: Sealy Texas
Cruise-In III Veteran
Re: Carburetor Tuning Program - Interested? (Yellow73BB)
Ken,
Great idea! How about making it work with USB? There's a chip out there that makes it pretty easy. Check out the latest edition of Nuts and Volts magazine. I would be happy to volunteer my hardware design and prototype expertise if you want some help.
Great idea! How about making it work with USB? There's a chip out there that makes it pretty easy. Check out the latest edition of Nuts and Volts magazine. I would be happy to volunteer my hardware design and prototype expertise if you want some help.
By the way, I still haven't got my 73 working quite right with the 1227747. I rebuilt the engine "AGAIN" in November and got everything going during Thanksgiving, but haven't had time to work on it since. Love the winaldl softwre!
Instructor
Joined: Jun 2002
Posts: 191
Likes: 0
From: Hillsboro OR
Re: Carburetor Tuning Program - Interested? (Ken73)
I sent you a bunch of emails (well, at least 1) last spring and you never replied. :yesnod: Figured you were busy.
I think the Nuts and Volts that has the USB was December. They send me an issue about once a year to try to get me to subscribe.
Do a google search for FT245BM, or check out this URL: http://www.ftdichip.com/FTPreview.htm
You might need to use serial A/D converters, but that would be OK.
What resolution are you using on your A/D? I've done a bunch of small circuit boards in the past, I usually just do a layout and send it to APCircuits up in Alberta to get them made. Costs about $60-$80 but it's worth it if you are serious about getting a good board. That's what I did for my driver board for my other two injectors on my Holley Projection throttle body. While I was at it I also put a dual fan controller for my SPAL setup on the same circuit board.
You could also put a small microcontroler (PIC) on the board to control things and simplify the computer interface.
Let me know if you want some help -- this sounds fun :)
I think the Nuts and Volts that has the USB was December. They send me an issue about once a year to try to get me to subscribe.
Do a google search for FT245BM, or check out this URL: http://www.ftdichip.com/FTPreview.htm
You might need to use serial A/D converters, but that would be OK.
What resolution are you using on your A/D? I've done a bunch of small circuit boards in the past, I usually just do a layout and send it to APCircuits up in Alberta to get them made. Costs about $60-$80 but it's worth it if you are serious about getting a good board. That's what I did for my driver board for my other two injectors on my Holley Projection throttle body. While I was at it I also put a dual fan controller for my SPAL setup on the same circuit board.
You could also put a small microcontroler (PIC) on the board to control things and simplify the computer interface.
Let me know if you want some help -- this sounds fun :)
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 2,961
Likes: 1
From: Sealy Texas
Cruise-In III Veteran
Re: Carburetor Tuning Program - Interested? (adam)
Adam, you can use WinALDL for your computer-controlled-carburetor setup. The interface costs about $5 (or less) to build, and the software is free.
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Burning Brakes
Joined: Sep 2000
Posts: 922
Likes: 0
From: Maine
Re: Carburetor Tuning Program - Interested? (adam)
Hi Ken,
I don't think that you would necessarily have to show TPS as part of the display (maybe just a number in the corner somewhere if there's room), but it would be useful as part of a data log. I used to use Craig's software on my MAF car (165 ECM) and TPS was useful while sorting things out. You could write-out a CSV file which can be read by most spreadsheets.
I don't know how you would determine which cells to exclude under acceleration unless you had a parameter to identify when TPS changes faster than a certain rate (?) i.e. accelerator pump working. I wonder how you could determine when the secondaries opened? Corelation with MAP?
I don't think that you would necessarily have to show TPS as part of the display (maybe just a number in the corner somewhere if there's room), but it would be useful as part of a data log. I used to use Craig's software on my MAF car (165 ECM) and TPS was useful while sorting things out. You could write-out a CSV file which can be read by most spreadsheets.
I don't know how you would determine which cells to exclude under acceleration unless you had a parameter to identify when TPS changes faster than a certain rate (?) i.e. accelerator pump working. I wonder how you could determine when the secondaries opened? Corelation with MAP?