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Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 01-09-2005   #1 (permalink)
meiring37ford is offline Apprentice


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Default converting to fuel injection on 289

Has anyone out there installed the new Holley fuel injection system on their 289. I am thinking as part of my engine rebuild to attempt it. Am I crazy?

Michael
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Unread 01-09-2005   #2 (permalink)
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No, you are not crazy for wanting the superior convience of EFI. :smoke:

However, for the cost of the Holly Pro-jection you can upgrade to a Ford EFI system from a late model EFI Mustang HO.

In every way it is superior to the Holley. :smoke:
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Unread 01-09-2005   #3 (permalink)
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Default Efi

Since I am not much of a mechanic and I have reviewed several articles on installing a 5.0 on a 289, I had hoped that the Holley system would be more straight forward and include all the parts. Since I really don't know the difference in cost or for that matter in performance I am looking for people that have tried both for some comparison information. Thanks for the input.
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Unread 01-10-2005   #4 (permalink)
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Do a Google on the Holley Pro-jection. It is REALLY tough to get it setup properly and some never get it right.
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Unread 01-10-2005   #5 (permalink)
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I plan on converting my 351 to EFI when I finally start messing with the engine. I will have to make my own wiring harness, and get a used computer as well as a few other parts but it wont be too difficult. Like Tominator said, its much more efficient.
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Unread 01-10-2005   #6 (permalink)
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Default Details are what I am after!!!

When you say more efficient, where can I find that information. The articles I have found seem to indicate that a 289 will get around 20 mpg with the 5.0 setup. But I have also found one article that indicates the Holley Pro injection also gets about 20 mpg. The only article I found on Google about problems was one from back in 1991. I am assuming that the Holley system has been improved since then. So the question still is, why is a 5.0 better when it has to be jerry rigged to fit a 289 and where can I find some real numbers on performance?

Thanks again :kooky:
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Unread 01-14-2005   #7 (permalink)
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It will be more efficient in that it will get better gas mileage, and more hp due to the better air/fuel ratio. There are a few differences depending on exactly what you are planning, do a search and you should be able to find all the information you need.
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Unread 01-16-2005   #8 (permalink)
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Quote:
Originally Posted by meiring37ford
So the question still is, why is a 5.0 better when it has to be jerry rigged to fit a 289 and where can I find some real numbers on performance?
Not sure about problems with the holley kit, but think about it this way. Once you go with a specific companys "kit", that will change/limit what your future options are for the motor. Converting to a ford EFI rig effectivly turns your motor into a "89-93 4.6-4.7", with all or at least most of the possible add ons and options. Plus theres lots more exp/advice floating around for the stock system.

Just my .02,
J
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Unread 01-16-2005   #9 (permalink)
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Quote:
Originally Posted by meiring37ford
So the question still is, why is a 5.0 better when it has to be jerry rigged to fit a 289 and where can I find some real numbers on performance?
Not sure about problems with the holley kit, but think about it this way. Once you go with a specific companys "kit", that will change/limit what your future options are for the motor. Converting to a ford EFI rig effectivly turns your motor into a "89-93 4.6-4.7", with all or at least most of the possible add ons and options. Plus theres lots more exp/advice floating around for the stock system.

Just my .02,
J
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Unread 01-25-2005   #10 (permalink)
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Default used the ford system

I don't have experience with the "new Holley EFI" systems but we put a pro-jection throttle body system on my dad's 71 f100 360 and it never ran right for a year and a half. We pulled it off and are going back to carb.

I converted to 88 ford EFI system (speed density) and was very pleased with drivability, cold starts etc. My setup came out of a cop car and was low on power compared to my 289. I converted to Mass air and currently have an intake, heads, throttle body,bigger mas air meter and soon a cam and roller rockers. The 88 crown vics are rated at less than 200 hp. My fuel economy went from 11-12 city / 17-18 hwy to 16-17 city and 22-23 hwy. I think it will do better with new oxygen sensors. I'd go with a mass air setup (found on mustangs) with the upper intake flipped like a crown vic, this is essentially what I have now. By rotating the upper intake the throttle cable is very simple to route and hook up.

My 289 had performer cam, hooker comp headers, dual plane intake, pertronix and edelbrock 600 carb. I dropped the stock crown vic motor in wtih a new oil pump, new paint and the old headers. I think the reason it felt down on power is the restrictive 49mm throttle body and grannie cam.

Having experience with both systems, I wouldn't recommend the holley pro-jection to anyone. The ford sytem can seems a little intimidating, but is far superior.

Look at all the companies that make performance parts for the ford factory efi systems and then how many make parts for the projections systems. FYI the holley projection systems use late 80's chevy caprice and half ton truck parts with a holley computer. If you're dead set on throttle body injection pull the parts from an 89 caprice donor. After all our experience with the pro-jection stuff we just wanted the truck to run again without more hassles.

Bottom line, you will be much happier with the drivability, cold starting, responsiveness, power potential and fuel economy with the ford factory system, that's why it's so much more common than the holley systems.

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Unread 06-04-2011   #11 (permalink)
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Default efi conversion for 289

so am i getting this right? In simple terms, the fuel injection manifold from a 90s 5.0 will fit right onto a carbed 289 block, and make the 289 fuel injected? Please help me figure this out ive been trying like mad to find an affordable fuel injection solution for my 67 coupe.
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Unread 06-05-2011   #12 (permalink)
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Quote:
Originally Posted by meiring37ford View Post
Has anyone out there installed the new Holley fuel injection system on their 289. I am thinking as part of my engine rebuild to attempt it. Am I crazy?

Michael

Hi,
No not crazy, just looking for something different. There are alternative vendor's kits to Holly. FAST, RetroTek etc. Do the leg work, before you spend the $2k for a complete kit.
The mags, have done various articles on these conversions. Check with Fordmuscle.com. I know they did an article.
Good Luck!
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