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I see why they call you Microsquirt...

 
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924RACR  



Joined: 29 Jul 2001
Posts: 8293
Location: Royal Oak, MI, USA

PostPosted: Wed Dec 11, 2019 1:12 am    Post subject: I see why they call you Microsquirt... Reply with quote

(riffing on the old joke)

Just noticed an enclosed, pre-built Microsquirt with 8' harness is all of $399USD on Amazon!
https://www.amazon.com/MegaSquirt-MicroSquirt-Engine-Management-Harness/dp/B081VVX2XB/ref=sr_1_1?keywords=Megasquirt&qid=1575989813&sr=8-1

Anyone know of any reason why this wouldn't work on a 931? Ready to get rid of my CIS and get reliable, get back to enjoying my car. Not a really extreme build; will be adding an IC as well, but seems like this would even be happier running just triggering the stock ignition unit, just eliminate the flaky stock crank position sensor and ignition controller...
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Vaughan Scott
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kondzi  



Joined: 02 Jul 2018
Posts: 89
Location: MZ/Poland/EU

PostPosted: Wed Dec 11, 2019 3:47 am    Post subject: Reply with quote

I’ve built 3 cars using MS2. If I remember correctry Micro and MS1 could do either spark of EFI. Not both. But I might be wrong.
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Konrad
'89 951 US
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Cédric  



Joined: 27 Aug 2004
Posts: 1973
Location: Sweden

PostPosted: Wed Dec 11, 2019 4:38 am    Post subject: Reply with quote

It should be possible to get that to work with some effort, a good deal for sure. Alot of stuff needs fixing to go full efi and spark, probably more than people first think.

I would really like to build a car with the speeduino system, a very clever open source system with a great community. Theres already one guy on this board that has started such a project.
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kondzi  



Joined: 02 Jul 2018
Posts: 89
Location: MZ/Poland/EU

PostPosted: Wed Dec 11, 2019 5:14 am    Post subject: Reply with quote

I’ve switched completely to Ecumaster, no more new projects based on MS. They are present in the EU and US as well. My last project https://youtu.be/EC1cGT3wNy8
Killer price/performance for the ECU (I use EMU Classic).
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Konrad
'89 951 US
'88 Mustang 5.0 LX Convertible (factory specs)
'84 911 Carrera 3.2 RoW (factory specs)
'81 931 RoW (TBD)
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'79 Ford Capri 2.9 (heavily modded)
'74 Ford Capri 1.3 (factory specs)
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1970
Location: Somerset, UK

PostPosted: Wed Dec 11, 2019 5:39 am    Post subject: Reply with quote

I read somewhere Raceboy was offering a plug and play VEMS EFI set up for 931. No idea the price or if everything needed is in the box
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 1914
Location: MI

PostPosted: Wed Dec 11, 2019 7:51 am    Post subject: Reply with quote

I have a microsquirt on my 931, kinda..

The hard parts will be, crank pickup trigger wheel, fuel rail, and TPS.. I think..

I have a good TPS/big TB solution for S1 though and will tell you all about it if you want..

I'm pretty sure microsquirt will batch fire 2 banks of injectors and 2 banks of coils just fine to run the 931..

And it is a bit cheaper right from DIYAT
https://www.diyautotune.com/product/microsquirt-engine-management-system-w-8-39-wiring-harness/

But IDK about shipping..

Another big expense will be a wideband and a quality MAP sensor, but are easy to do.
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924RACR  



Joined: 29 Jul 2001
Posts: 8293
Location: Royal Oak, MI, USA

PostPosted: Wed Dec 11, 2019 8:14 am    Post subject: Reply with quote

Thankfully, mine's an S2, easy peasy just swap out the TPS with a modern sensor. Actually have some Ford ones sitting on the shelf unused, might be good enough.

Already have the WBO2 installed and functional; fuel rail on the shelf, and hope to grab one of Dan's trigger wheels in the clearance section... maybe a bracket too, but that'll be easy to fab if needed anyway (compared to others). Then a good fresh MAP sensor etc...
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 1914
Location: MI

PostPosted: Wed Dec 11, 2019 10:43 am    Post subject: Re: I see why they call you Microsquirt... Reply with quote

924RACR wrote:
Ready to get rid of my CIS and get reliable


Another thing I'd like to say is this probably isn't a quick scheme to make a reliable DD..

If you are going to take over your CIS and ignition at the same time, it's might be complicated just to get the thing to start for the first time.. Then you are talking about hours and hours of tuning and learning..
Do you or anyone near you have experience setting up and tuning standalone?
Ignition and fuel, and my map will be useless to you..

I can literally unplug my microsquirt and my car will still run and drive, so it's not like I've gone through all that completely..
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KDJones2000  



Joined: 14 Sep 2010
Posts: 319
Location: Phoenix, AZ

PostPosted: Wed Dec 11, 2019 3:28 pm    Post subject: Reply with quote

Some have tried MS on 951's and have blown their engines, at least from 5+ years ago. Something about losing crank position.

Just a cautionary tale...
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924RACR  



Joined: 29 Jul 2001
Posts: 8293
Location: Royal Oak, MI, USA

PostPosted: Wed Dec 11, 2019 11:28 pm    Post subject: Reply with quote

Yeah, I'm definitely not worried about our technical capabilities; my day job is SW development, calibration and testing in-vehicle for Bosch. Just not on the Powertrain side, and I have access to many who have powertrain calibration experience, OEM and aftermarket.

Gotta love the Motor City.

Though it could be a sticking point for others, your point is well-put...
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