https://www.diyautotune.com/product/mic ... g-harness/
Looks like with batch fire injectors this could prove to be an easy cheap way to add a stand alone. Anyone try it? I was going to email them and ask if its compatible with all of our efi bits. Wiring in a chevy map sensor would be no big deal.
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anyone use microsquirt?
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- jdlaugh430
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- Joined: Wed Mar 13, 2013 9:57 pm
Re: anyone use microsquirt?
I'm using a Microsquirt PNP unit from DIYAutotune. It's an earlier version than the one you linked to. The key to make these system work on the Ford sixes is a system to monitor engine revolutions. I'm using the Ford TFI ignition system, since the distributor for the 300 ci engines from the 80s/90s was a direct drop-in for my old 240 six. If you have a vehicle with TFI -- or some other Ford EFI system -- you can make it work with MIcrosquirt.
Cost is reasonable, but expect a major learning experience. It's far, far, from a plug and play setup. Still, I'm on my third project and I've been happy with the final results. I built a Megasquirt system back in 2004 so I could turbocharge a 4 banger '87 Toyota MR2 and it's still out there boosting away 13 years later.
Cost is reasonable, but expect a major learning experience. It's far, far, from a plug and play setup. Still, I'm on my third project and I've been happy with the final results. I built a Megasquirt system back in 2004 so I could turbocharge a 4 banger '87 Toyota MR2 and it's still out there boosting away 13 years later.
James, Tulsa, OK
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
Re: anyone use microsquirt?
I looked at Microsquirt. In talking to the DIY guys, you'll need some big resistors in line to run the injectors as compare with regular Megasquirt. I think the resistors needed for the Microsquirt setup on a large TBI style injector is a pricey item.
So, it may not be as much of a bargain as it looks.
So, it may not be as much of a bargain as it looks.
1966 Bronco-'78 250-Meagsquirted TBI, DUI, Header, Cam, Hydroboost & Front Disc, Uncut, 1" body lift, 2.0" suspension lift
- jdlaugh430
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- Joined: Wed Mar 13, 2013 9:57 pm
Re: anyone use microsquirt?
jimmyv65 wrote:I looked at Microsquirt. In talking to the DIY guys, you'll need some big resistors in line to run the injectors as compare with regular Megasquirt. I think the resistors needed for the Microsquirt setup on a large TBI style injector is a pricey item.
So, it may not be as much of a bargain as it looks.
Might ask the DIY Autotune guys if that's correct. According to the documentation I found on Microsquirt: "To get everything to fit without gobs of heat sinking, MicroSquirt® uses the ST VND5N07 from STMicroelectronics. This is not a peak and hold driver, but it does clamp the current at 5 amps so it can be used with one low-impedance injector per bank"
MIcrosquirt has two injector banks, and a TBI uses two low impedance injectors, one on each bank. At least that's how I have mine wired. I haven't had it running but a few minutes at a time, so I can't guarantee it will work long term. Of course if you have injectors on each cylinder, then just go with high-impedance ones.
Microsquirt documentation
James, Tulsa, OK
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
Re: anyone use microsquirt?
I saw some write ups on using it on ls engines with batch fire. Our Ford injectors are high impedance eh? I have a 93 efi. I'm wanting to get a stand alone setup first and running smooth and then later on drop in an engine setup for small boost. 6-10 psi. I'm a science teacher and painting my truck and hopefully getting mega/microsquirt going is my summer project.
Re: anyone use microsquirt?
http://www.efisource.com/shop/microsqui ... 0-mustang/
They will sell me just the wires and eeciv connector for 40 bucks. Not sure if that is a good deal or not but it would make the install clean.
They will sell me just the wires and eeciv connector for 40 bucks. Not sure if that is a good deal or not but it would make the install clean.
- jdlaugh430
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- Joined: Wed Mar 13, 2013 9:57 pm
Re: anyone use microsquirt?
For my first build, I went to the junk yard and found a car with the correct computer, took the computer apart and cut the connectors off the board inside. If they are offering a connector that allows you to plug the Squirt into your stock harness, that saves you a bunch of hassle and seems reasonable.
On the injectors, most Fords are high impedance. I bet 24 lb injectors would be a nice upgrade for a small boost setup on a Ford 300.
On the injectors, most Fords are high impedance. I bet 24 lb injectors would be a nice upgrade for a small boost setup on a Ford 300.
James, Tulsa, OK
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
Re: anyone use microsquirt?
jdlaugh430 wrote:Might ask the DIY Autotune guys if that's correct. According to the documentation.....
Of course if you have injectors on each cylinder, then just go with high-impedance ones.
Yeah, I can't say that for certain. Just passing on what I was told.
1966 Bronco-'78 250-Meagsquirted TBI, DUI, Header, Cam, Hydroboost & Front Disc, Uncut, 1" body lift, 2.0" suspension lift
Re: anyone use microsquirt?
I emailed them. Once I'm certain it'll work for me I'll probably pull the trigger on it. Can't wait to buy a wide band and get er going. I think I'm going to put it in my glove box along with an electronic fuel pressure gauge.
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Re: anyone use microsquirt?
jimmyv65 wrote:I looked at Microsquirt. In talking to the DIY guys, you'll need some big resistors in line to run the injectors as compare with regular Megasquirt. I think the resistors needed for the Microsquirt setup on a large TBI style injector is a pricey item.
Can you use a ballast resistor pack from a car with low impedance injectors, like a turboford (Lima 2.3 turbo) or Volvo red block turbo?
Re: anyone use microsquirt?
thesameguy wrote:jimmyv65 wrote:I looked at Microsquirt. In talking to the DIY guys, you'll need some big resistors in line to run the injectors as compare with regular Megasquirt. I think the resistors needed for the Microsquirt setup on a large TBI style injector is a pricey item.
Can you use a ballast resistor pack from a car with low impedance injectors, like a turboford (Lima 2.3 turbo) or Volvo red block turbo?
Yes you can. I used a resistor pack for a long time on my car and many others have also. It slows the injector response and dead time, but with TBI, that won't be critical like port injection.
1967 F-250 Crew Cab 2wd, 300 6cyl, T-170/RTS/TOD 4-speed overdrive
240 head, Offy C, EFI exhaust manifolds, Comp 268H, mandrel 2.5-3" exhaust, Edelbrock 500, Pertronix ignitor and coil, recurved dizzy. 200whp/300wtq
240 head, Offy C, EFI exhaust manifolds, Comp 268H, mandrel 2.5-3" exhaust, Edelbrock 500, Pertronix ignitor and coil, recurved dizzy. 200whp/300wtq
- jdlaugh430
- Registered User
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- Joined: Wed Mar 13, 2013 9:57 pm
Re: anyone use microsquirt?
I bought two eight ohm, 25 watt resistors from a local electronic supply house for my two TBI injectors. They were like $2 each. If you use a ballast resistor from another car just be sure to measure their ohm value. There are on-line calculators that will tell you what size you need, depending on the resistance value of your specific injectors.
Here is a deal on Ebay for two resistors for $6.95 and free shipping: Ebay resistors
Here is a deal on Ebay for two resistors for $6.95 and free shipping: Ebay resistors
James, Tulsa, OK
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
1965 Econoline "Heavy Duty" Pickup
"A Work in Progress"
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