The first of many stupid questions
I have been reading through the stickys but decide on exactly what i need to get the job done.
Starting this winter im going to be building my own megasquirt ecu. between my dad and i we can get the thing assembled, no problem there. but cant decide on what parts i need to put into to get the right outcome. i want it to be a standalone system, the car has had the ac removed so that dosnt need to be wired in. oh and i want to keep it MBC. What all should i need, to do it correctly. |
I believe your first of many stupid questions is missing a question.
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Originally Posted by hochkis
(Post 768382)
I believe your first of many stupid questions is missing a question.
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you need MS unassembled kit, get atleast pcb v3 and MS2 or MS3
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addons cards? wiring harnesses?
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wiring harness you can do a couple ways, I cut apart another ecu to get its main connector out and wired up wires to the db37 soldercups that come with the kits.
I just bought some wire and did mine up, or you can buy diyautotune's colored coded wiring, they also have prebuilt harnesses. Check their wiring componets area. you haven't said anything that I noticed would need addon cards. |
I would also recommend a wideband if you don't have one already. I'd recommend a slc oem one if you want a good cheap one. If you want one that has a gauge readout, I'd probably go with a innovate MTX-L
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I wonder if you read the "How to build your own Megasquirt" thread by Brain. I am pretty sure he included a list of parts as well as a detail step-by-step assembly process...
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soldering iron, solder
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i did read that thread he mentioned some addons and i was wondering if i need them for my particular application. does the ms have fan control.
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programable outputs, so yeah its on there how to drive the fans
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You decided to ditch your half ass pos bandaids and go ms.
You are not stupid after all. Good luck. The amount of info about ms on this site is staggering. |
Originally Posted by 18psi
(Post 768426)
You are not stupid after all.
i have had the intention of going ms since around june, but havnt been able to afford the pnp. im going to save up and build my own. its cheaper and i will understand it better. thoughts on the tester device? |
One bit of advice for reliability. Do as little hacking on your stock harness as possible. Get proper connectors to make a patch cable into your MS.
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Originally Posted by hornetball
(Post 768560)
One bit of advice for reliability. Do as little hacking on your stock harness as possible. Get proper connectors to make a patch cable into your MS.
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I'm not sure, but I know they are available. Do a search, I seem to remember someone posted links to a source.
In my case, I just went MSPNP . . . problem solved. But it is more expensive, and I often wish I was MS2 or MS3 based. It is really easy to change tunes. Takes about 5-10 seconds. However, I don't think you're going to find it necessary. Generally, you select between the "race tune" and the "economy tune" with your right foot. |
just wondering if you can program it to have warnings/ do something about a problem. lets say a/f ratio drops below 12:1, i would like a buzzer or something to go off. and maybe within the ms change settings automatically.
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http://miataturbo.wikidot.com/ms2-i
I used this for building my MS2 and it was HUGELY useful. That was my basic "guide", supplemented by some sticky threads in here for things like fuel pump mod. |
Also, for the harness I would spend the $$$ on a DIYBOB - http://www.diyautotune.com/catalog/d...pin-p-411.html
I imagine it would make soldering the harness way, way easier. |
Originally Posted by redturbomiata
(Post 768610)
Who sells the needed pieces. reliability is a must. how hard is it to switch between a couple tunes. im thinking a Good MPG tune, Race tune, and a split between the two.
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Originally Posted by redturbomiata
(Post 768610)
Who sells the needed pieces. reliability is a must. how hard is it to switch between a couple tunes. im thinking a Good MPG tune, Race tune, and a split between the two.
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Originally Posted by Techsalvager
(Post 769294)
Doable with a flick of a switch, switch between two tunes.
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Originally Posted by Braineack
(Post 769409)
pointless. How about be easy on the go fast pedal and stay out of boost when cruising?
same as 100kpa line, other starts adding fuel eariler Depends on what you want and need. I try to aim for 14.7:1 at 100kpa to around 3800rpm for my current cruising setup also I'd be worried about transtional spark timing, say coming off of fuel load down where spark timing is at 35-40 degrees and mashing the pedal and jumping back up into high boost area where timing is limited by det Like wise if you plan to use different fuels that could be a good reason to have mutiple maps, e85\93 LPG\93 etc |
Originally Posted by Techsalvager
(Post 769420)
one is biased to high AFRS and high timing in cruise, the other not so much
same as 100kpa line, other starts adding fuel eariler Depends on what you want and need. I try to aim for 14.7:1 at 100kpa to around 3800rpm for my current cruising setup also I'd be worried about transtional spark timing, say coming off of fuel load down where spark timing is at 35-40 degrees and mashing the pedal and jumping back up into high boost area where timing is limited by det Like wise if you plan to use different fuels that could be a good reason to have mutiple maps, e85\93 LPG\93 etc |
Originally Posted by Matt Cramer
(Post 769408)
How would the two tunes be different?
but you guys are the ms people, im just asking if its possible to do it. and being able to shift tunes on the fly would be nice, not necessary because i will have my laptop with me most of the time. |
Originally Posted by redturbomiata
(Post 769452)
for some reason they dont sell e85 in that many gas stations around here, and theres a company about 20 min up the highway that makes it. but for the DD tune i want to run 89 and the race tune 93.
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Originally Posted by hornetball
(Post 769460)
So, you're really going to go to the dyno twice to tune spark . . . once with 89 and a second time with 93? The cost of a second tuning session buys a bunch of premium . . . and you'll be happier with the snappier performance and better mileage to boot.
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27mpg city and 230rwtq... im good.
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Originally Posted by Braineack
(Post 769470)
27mpg city and 230rwtq... im good.
just wondering if you can program it to have warnings/ do something about a problem. lets say a/f ratio drops below a set range. i would like a buzzer or something to go off. and maybe within the ms change settings automatically. |
Originally Posted by redturbomiata
(Post 769469)
no i was looking for milage mostly. figured i can have power or milage not both. btw i grow up on old ford v8s so this whole 4cyl turbo thing is a adjustment.
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ok so once again looking through the options, and the diypnp is looking appealing, says its ms2 based. it uses the factory wiring harness too correct? any problems with the diypnp kit, limitations type things.
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it has a limited number of inputs and outputs if you get too crazy with it. But a crap ton of guys here on running it.
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Originally Posted by Braineack
(Post 769552)
it has a limited number of inputs and outputs if you get too crazy with it. But a crap ton of guys here on running it.
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you can't upgrade DIYPNP to MS3. but you could sell it and just buy an MS3 kit.
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Originally Posted by soviet
(Post 769568)
you can't upgrade DIYPNP to MS3. but you could sell it and just buy an MS3 kit.
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