Engine Management System for Mild 351W EFI

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Apr 15, 2020 | 07:37 AM

jackietreehorn

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From: Northern VA

Engine Management System for Mild 351W EFI

Can anybody point me in the right direction toward what kind of computer, MAF meter, and injectors I should use for my 351w roller with c/6 transmission. This is a 4x4 F-250 3.55 gears which will be used for actual truck duties such as hauling and towing, not burning up the drag strip.

I am using long tube headers, GT40P heads, Comp 35-349-8 roller camshaft, GT-40 lower and upper intake, with 75mm single throttle body.

I am leaning towards some type of a Ford MAF, 5.0 injector harness + 5.0 cobra or bronco computer, but I am lost as to which weight injectors and computer I should use to make use of these bolt-ons. I am leaning towards a mustang computer, but then I feel that the "tune" would be geared toward a small lightweight car. Are there other options that EEC-IV?

Would 40 pound injectors be overkill?

Apr 15, 2020 | 03:46 PM

Conanski

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From: Ottawa, Ontario

That is a 300hp motor give or take so 24lb injectors is plenty, and a Mustang computer would do a great job with a 72mm MAF sensor and some tuning. A Pimpx computer might be easier overall though.

Apr 15, 2020 | 07:47 PM

torq'ta 5 8

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From: N.W. Alabama

89F2urd did this when he built his
460 comp & injectors into a 351 - Ford Truck Enthusiasts Forums

Apr 15, 2020 | 09:19 PM

Blurry94

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From: Calhoun GA

Quote:

Originally Posted by jackietreehorn

Would 40 pound injectors be overkill?

Are you taking it somewhere to have it tuned, or do you plan on doing it yourself?

Apr 16, 2020 | 07:45 AM

jackietreehorn

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From: Northern VA

Thanks all for the replies-- I am itching to get this thing back together. I am leaning towards 24 pound injectors and ECU + MAF from a 5.0 cobra w/ manual trans. That should do it right? I am a bit disappointed to hear that I'll only be getting 300 HP out of this, figured at least 350.

I would be open to getting it tuned but I don't know shops do that around here. Tuning requires a shop to drive/dyno it, correct?

PimpX is enticing, but the cost really dampens my enthusiasm--would cost more than my long block so far.

I try to DIY everything I can within reason. This is an low-buck build. Most of the parts I have gotten used.

Apr 16, 2020 | 01:25 PM

jackietreehorn

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Cargo Master

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From: Northern VA

I ordered a 95 Cobra 5.0 ECU, found 24lb injectors with calibrated 76mm MAF plus "BBKcold air intake" used, and I will be pulling the entire engine wire harness from a 95 5.0 Bronco. These cobbled together should get me going?

Apr 16, 2020 | 01:35 PM

xlt4wd90

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From: SoCal

If you just want a simple setup, the A9L EEC from a Mustang GT will work just fine, but it and/or its MAF sensor need to be tuned to work with 24# injectors. That computer should work fine with the standard MAF and 19# injectors, but they may be running right at their limits to support 300HP at the flywheel.

If you can find a X3Z EEC and MAF from a 1993 Cobra, they should work with the 24# injectors with no modifications. This will easily support 300HP, with headroom up to 380HP.