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MAF/Injector Question

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Old 10-21-2008, 09:22 PM
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1984Fox
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Question MAF/Injector Question

Hey all,
I'm going to be putting a new motor in my fox pretty soon here...
I am probably going to do a built 347 and a Procharger... I would like to run a decent amount of boost (15 psi..ish)
What size MAF do I need?
I was thinking 42 lb injectors, but maybe more?
Thanks for any input...
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Old 10-21-2008, 09:47 PM
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NoGo95GT
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I think the 42lb injectors would be out of their comfort range w/your setup. I would spring for some 60's along with an internal/external fuel pump combo. As for the MAF, I would either run a Lightning(has to be tuned properly to work) or a Pro M 80 or 92.
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Old 10-21-2008, 10:03 PM
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dudeboy
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With boost you will likely want a tune anyway... so the 90mm LMAF should be considered equally...
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Old 10-21-2008, 10:46 PM
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jtmustang
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damn a built 347 and 15 lbs from a procharger that will make some serious power all this on a stock block.....tune is indefinite
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Old 10-21-2008, 10:49 PM
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1984Fox
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Not a stock block.. I gotta talk to my guy about it some more...
This project is gonna take a bit, I need an 8.8 rear, fuel system, wiring harness, ECU....
I've got a great tuner here in town, exclusive to stangs.
Can someone toss me a link to where I can find some info on the Lightning MAF??
Thanks guys.
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Old 10-21-2008, 10:53 PM
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NoGo95GT
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I don't have a link. However, I know many 96+ Supercharged mustangs run them. It's their preffered meter. Plus ebay sells them for under $90 new(shipped). That is where I got mine from. Also, the Lightning is a big meter(90mm).
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Old 10-21-2008, 10:56 PM
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1984Fox
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That's not a bad deal at all....
Also, what cam should I run w/ this app?
I'm thinking for the most part I'll run lower boost than 15 lbs, but I want it to be capable of that much for the track, or running with some of the big dogs in town...
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Old 10-21-2008, 10:57 PM
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Deff. look into getting a custom cam with your setup
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Old 10-21-2008, 10:58 PM
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The LMAF is popular because of it's accuracy out of the box. There is a known MAF Transfer for the meter, and it is easy to find. The price can't be beat, as it would be tough to find a used 90mm aftermarket unit for the price of a new LMAF.

The only downsides that I can see is that it REQUIRES a J3 chip to run on a Fox ecu, and you have to spice the wire harness as the plug is different.
Well, I guess the fact that it is 4" ID could be a downside as well, as the plumbing can take some work.
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Old 10-21-2008, 11:02 PM
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1984Fox
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Yeah that's true...
I'll probably be getting some GT40 heads with alot of work done to them as well... This should be okay for my setup right?
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