[Diy_efi] Microcontroller based Auto Related Projects

Fri Nov 16 01:45:23 UTC 2012

Gosh nik,
My first thought is, are the Fiji Is big enough for a 1/4 mile circuit  !, so if
the chute or brakes fail your get a soft salty landing :-)  :eek: 
I used to do some pocsag stuff at 148 and 432 MHz, all micro controller protocols
and queing using ramtron's ferro-electric memory for non-volatile comms
critical hospice care type nurse comms etc. all superseded now...
A single injector controller is fine, you can always parallel them for 4, 6, cyl etc
choice is whether MAP or MAF. MAP easier placement but not generally
as precise as MAF which needs a bit more plumbing re the sensor,
MAP is still good but can drift if air filter blocks or exhaust pipe or cam changes etc
which then impact on inlet pressure changes etc... These days micros with
usb are cheap and easier to develop so can plug it into laptop for passenger
etc. Shouldnt you be doing this for a boat - given sea level rises, climate change etc ;-)

Gotta go, need sleep, cheers
Mike

At 09:35 AM 16/11/2012, you wrote:
>no no no...I'm not into that sort of crap either. In fact I don't even like when someone talks to me about the color of paint on their cars for eg. I've been on the list on and off never posted before reading and seeing what comes up. But lately have got a lot of time due to no projects going on at work. I'm a mobile comms engineer btw. I've done some 1/4  mile racing with my (now sold) 1988 toyota corsa (2 door pop-up lights type) 1.5l turbo/IC car. Did a lot of mechanical mods and basic EFI 'fool' mods to increase boost etc. Did win a couple of races, lost most others! lol
>
>I've found the idea of building a single injector controller a good place to start especially when what I do feels like a walk in the park too easy is RF optimization, lot of protocols to study though in mobile comms. So I thought what better way to use my time now that racing is off too.
>
>Once I grasp some injector control theory, I'll make a flow chart. I'm not concentrating on any thing else at the moment.
>
>Escorts are great cars among 240z and chargers that I like very much. But never had the pleasure....
>
>Anyways, I was reading and simply ask the question never thought of any thing else.
>
>Regards.
>
>Nikhil
>Fiji Is.
>
>On Fri, Nov 16, 2012 at 2:17 PM, Mike <<mailto:niche at iinet.net.au>niche at iinet.net.au> wrote:
>Ah np, I see the issue, its just we get odd ppls asking efi questions re parts they need
>for existing production cars as if we are parts suppliers and want links and often those ppl also
>are annoymous, so one gets easily put off if you dont have a name and havent seen any
>emails from you before and I've been here years... bit frustrating and
>esp for me as I am into demographics having worked for a PI years ago and keep up
>with the 'psychology of deception' and other fringe technical sociological issues. btw: My
>engineering thesis in 1982 was efi with integrated transmission control, currently getting a 
>1972 ford escort ready for my son but with twin down draught carbs.
>Will shove EFI into that a bit later, as in, will leave the carbs and have it run on both, primarily
>as my 20 year old wants as much get up and go as possible, might build an air motion
>transformer in later, have 5 different micro development kits but commercial work on at
>present. its now 9am here, have been up since 6pm last night, obviously need some sleep...
>
>useful link btw, didnt know these guys at all,
>this list has been pretty quiet for a couple of years but only in the last 3 weeks or so the
>list server has been configed differently so its a bit more active though other members prob
>asleep right now :-)
>cheers for now
>Mike
>
>At 09:07 AM 16/11/2012, you wrote:
>
>>Sorry for the misunderstanding. I think my motives are clear from this thread if u read the past emails. I'm building. Did introduce myself too, in a way at least.
>>
>>Obviously I don't expect a must have answer. But ill stay if thats alright and help where I can.
>>
>>- Android 2.3.4
>>On Nov 16, 2012 1:01 PM, "Mike" <<mailto:niche at iinet.net.au>niche at iinet.net.au> wrote:  
>>Its most efficient to ask the person that made the statement, 
>>so you then dont bring others in and potentially waste time... 
>>not muddying the waters by asking someone else, by all means 
>>ask here but best only if you dont get a good answer from the source etc 
>>Dont know what you mean by '...acting on others...' I dont know the 
>>maker of that system or anyone associated with it,  explain please ?
>>This is an email list, people only answer if they want to, they dont have to, 
>>You didnt say whether you were buying or building yourself, my level of 
>>efficiency is to find out first oneself from the best place - which is the source. 
>>Not to look for mailing lists, not introduce yourself and expect opinions, 
>>we are all about innovation in our own work primarily and to help builders etc 
>>You are not paying for this, It would be nice if some who took the easy option 
>>paid for my time, but then what is free opinion/advice worth.
>>Will you now build or stay on the list as a member to help others and actually 
>>be like others and have a real name ?
>>Mike
>>
>>At 08:52 AM 16/11/2012, you wrote:
>>
>>>No not buying. Got stuck at that, thought I'd ask. What is with some acting on others behalf. Thought that's why this forum is here. :-)
>>>- Android 2.3.4 
>>>On Nov 16, 2012 12:30 PM, "Mike" <<mailto:niche at iinet.net.au>niche at iinet.net.au> wrote:  
>>>Thanks for link 'funny name' xyz#$&^%# 
>>>It says 'primary' this is before any correction factors added for eng temp etc 
>>>if you are buying on he will help, if not just 
>>>looking for theory or want to build your own there are lots of sites 
>>>and other people on this email list are also busy, so best do a lot 
>>>of reading and speak/email to the seller or just buyu his, 
>>>cheers 
>>>mike 
>>>At 08:13 AM 16/11/2012, you wrote:
>>>
>>>>Rending, after truncating. Message exceeded 40kb. 
>>>>On Nov 16, 2012 12:08 PM, "xyz _" <<mailto:xyzqhtc at gmail.com>xyzqhtc at gmail.com> wrote: 
>>>>> 
>>>>> Here's the link: 
>>>>> 
>>>>> <http://www.sdsefi.com/em2def.htm#EM-2D>www.sdsefi.com/em2def.htm#EM-2D 
>>>>> 
>>>>> Check under 'Theory of Operation'. 
>>>>> 
>>>>> - Android 2.3.4 
>>>>> 
>>>>> On Nov 16, 2012 11:42 AM, "Mike" <<mailto:niche at iinet.net.au>niche at iinet.net.au> wrote: 
>>>>>> 
>>>>>> Hi, 
>>>>>> Manifold pressure should be processed into a value and 
>>>>>> used to look up a table of values for that engine and be recalibrated 
>>>>>> should intake, timing etc change. Mass air flow gets around most 
>>>>>> of that. I'd go back to the source of that statement below, 
>>>>>> regards 
>>>>>> mike 
>>>>>> 
>>>>>> 
>>>>>> At 07:26 AM 16/11/2012, you wrote: 
>>>>>> 
>>>>>>> I'd been doing some reading and searching. Came across a website that mentions "manifold pressure value is multiplied by the rpm value to determine the primary pulse width (of injector). 
>>>>>>> 
>>>>>>> 1. Can someone please elaborate on this. I know what MP and rpm are but how exactly is this done? 
>>>>>>> 
>>>>>>> 2. Is this a good method and/or are there any other methods available? 
>>>>>>> 
>>>>>>> Thanks. 
>>>>- Android 2.3.4 
>>>>_______________________________________________ 
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