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Old 11-24-2009, 05:35 AM
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Megasquirt users out there?

Ok I have 91 trans am that I just built a 383 fuel injected engine for. Originally it had the 5.7 L98 TPI engine.

I am very interested in getting a megasquirt system for it but I was wondering how do you guys feel about it? Is it really all its cracked up to be?
Also how hard is it to set up if I was using a assembled unit, is it pretty much just splicing and hooking up the right wires?

Thanks, Daivd

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Old 11-24-2009, 07:42 PM
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Anyone out there use mega squirt?
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Old 11-24-2009, 07:57 PM
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You might have better luck asking this question over at www.yellowbullet.com, a lot more racers using fuel injection over there.
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Old 11-24-2009, 08:02 PM
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I've built one and used it on two different engines. I think it's a great alternative to high priced aftermarket EFI systems (although lower cost units have been comming out recently) and will be building another one pretty soon.

BUT, that being said I wouldn't use it just because it's cheaper. It's really a learning tool for someone that wants to learn how to build and program the computer to run thier engine. Yes, you can buy "plug and play" pre assembled kits, but you will still have to do the fine tuning yourself.

If you are willing to read the manual cover to cover at least three times, are comfortable with tuning an engine, working with computers and doing electrical wiring, then I say go for it!
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Old 11-24-2009, 08:13 PM
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Megasquirt user

I've been collecting FI parts to convert my wife's one barrel 6 cyl convertible mustang to megasquirt. I've purchased megasquirt cables, and the stimulator in prep for the conversion; still saving money for the rest. I'm going to start small with converting fuel first; when that is working then I'll attempt spark control as well using a Fairmont electronic dizzy. As with anything, megasquirt requires a lot of research, and probably a lot of trial and error; couple that with converting a vintage fuel system to a compatible FI system, it is quite a challenge. I've not spoken to anyone that has used their plug and play units; I prefer to do the soldering myself and save a few $$$. If this conversion works well, which I expect, I'm going to megasquirt my 500 ci Caddi convertible... The Ford 6 cyl with a Tempo CFI is the guinea pig. I'm also looking at their 4L80e controller to add overdrive to the 500 ci '67 deville as well. Hope to house both the fuel/spark controller with the tranny controller together...
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Old 11-25-2009, 05:33 AM
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Alright thanks guys. Yeah I do realize that I still have to do all my own tuning and its not just plug and play.

Thanks David
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Old 11-25-2009, 06:53 PM
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YB2, you already have a pretty decent ECM with the wiring harness in the car.
for less than what you would spend on a mega squirt, you can go bare bones and get the stuff to tune the factory ECM.
to work with the factory ECM you would need a few chips, a chip adapter, a burner, and an ALDL cable which you can build for a few bucks if your so inclined.
for either system you need a laptop for data logging and tuning.
a good wideband O2 sensor is a plus no matter which way you go.
the learning curve is pretty much the same for either system.
there are also options for real time tuning the factory ECM.

are you going the run the stock TPI intake on the motor?
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Old 11-25-2009, 07:32 PM
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I say go to the forum at bangshift.com and find dieselgeek , he's big time into the megasquirt, very helpful and tunes some top notch cars with MS including hubers mustang, drag week cars such as Jeffs malibu and a multitude of others.
good guy, very helpful.
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Old 11-30-2009, 05:36 AM
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Alright thanks I was thinking of tuning what I already have as well. Where would I look at to get the stuff I need? Is tuner C.A.T.S. a good place? Also how would I run a wide band O2 with my stock PCM?
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Old 11-30-2009, 07:54 PM
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Does anyone know how to run a wide band O2 system with an OBD1 computer?
Thanks David
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