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What is the best aftermarket fuel injection for a 351?

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49K views 19 replies 16 participants last post by  kketell  
#1 ·
Daydreaming a bit here, what is the best fuel injection system for upgrading a 351?
 
#2 ·
Funny you should mention that. I was looking at fordfuelinjection.com today and there is an interesting comparison of the various aftermarket systems. Ford Fuel Injection » Aftermarket EFI Computers Like the author of the comparison article said, "the answer depends on what you want for your car. Do a little research and figure out what is best for you." As an aside, fordfuelinjection offers harnesses to retrofit factory Ford EEC systems, which could work well with some tuning.
 
#5 ·
I have the Mass-Flo EFI system on my 408W and am very happy with it. It uses the standard A9L that was used for the 89-93 5.0s with manual transmission. However, it is recalibrated to match your engine. When ordering you're going to get lots of questions about your engine so plan ahead. Here are a few comments about it:

- The mass air meter is hidden inside a standard carbed air cleaner and the throttle body is made to bolt onto either a Victor Jr. or a Torker II modified to accept fuel rails. I went with the Torker II to give me clearance under a stock hood. I had to port it to match my Victor Jr. heads. The Torker II runners are way smaller than the intake runners on the heads.

- They system is self learning just like the Ford system. Drive around awhile and it learns the ideal injector pulse for various loads, atmospheric pressure, and throttle positions.

- If you're looking for the carbed look this comes close. The giveaway are the fuel rails and wire harness running under the air cleaner.

- It uses all stock ford sensors so sensor replacement is easy and relatively inexpensive.

A few minuses:

- You're own your own for a fuel supply system or they'll provide one to match your engine needs but it's extra and expect to pay big bucks.

- If you want to change tune you'll have to get a new chipped burned. Lots of dyno time and money. It is not for the drag guy looking to squeeze out every last HP. The A9L is designed to give you "safe" power. About all you can do yourself is advance the timing.

Overall I'd say it's about as reliable as it gets for the daily driver. Turns over at the first crank of the key no matter how long the car has been sitting.
 
#7 ·
I'm trying to figure out how to post pictures. This is my first attempt so I figured this thread would be as good as any. Anyway. Here's my EFI system. Note the giveaway fuel rails running under either side of the air cleaner.

Image
 
#8 ·
Here's something to drool over... I'd love to install something like this some day.

TWM Induction system
Image
 
#9 · (Edited)
heres the cheaper and much easier ways to convert to efi, from all the dyno tests I have seen they work just as well as port injection and sometimes better in the hp department.

Carb-to-EFI Conversion Has Never Been EZer

Professional Products Online

I have a powerjection 1 I'm going to install on my 408 stroker its like the powerjection 3 but with ignition control and a seperate computer.
 
#10 ·
#13 ·
The Stack and Hillborn system are beautiful, no doubt. But I have heard the are all but impossible to get tuned. If I remember Kent Ketell had one on KKPony and had nothing but troubles with it.
 
#14 ·
The stack system I've shown above with the link to Verycoolparts.com is sold by Wayne Pressley. I know him from various get-togethers over the years and, while I agree that the stack systems my be difficult to tune, Wayne will do it for you. If you live anywhere close to Alabama you should check it out. He's got a dyno and knows his stuff. I can guarantee that he'll get it right. I've even seen him tune cars in Ohio. He just stuffs a wide band O2 analyzer way up the exhaust pipe, sits in the passenger seat with his laptop while the owner drives, and tunes the system on the road or track. Once properly tuned you don't need to worry about it. Now coming up with the $$ to buy one of his systems is another story.
 
#16 ·
It is really hard to beat the ford multiport system. It is engineered very well , and there are no end of performance parts for it. With a chip and dyno tune, it can handle a wide array of engine designs.

I put a 5.0 in my 69. after studying it enough to modify the factory harness and getting my car running, I gained a lot of respect for what they have done.

Brian
 
#18 ·
Being a drag racer, I've used and tuned most EFI systems on the market. Although there are a few lower cost systems like the MegaSquirt out now, it's hard to beat the power and tuning ease of a FAST XFI or Big Stuff 3. Personally, I find the 16x16 fueling tables in those two(and the Accell GenVII DFI) to be easier than the load tables in some of the others.
 
#19 ·
When selecting a EFI system, I think you need to ask yourself "what do I want it to do"? Most of the time the answer will quickly appear. I like the Gen 7 personally as it had all the "bells and wistles" that I planned to use on the car (boost, n20,dual fans,a/c cutout,EDIS,low imp injectors,wideband o2,data logging,etc). I was in line for a FAST XFI but they were still working out some bugs when I bought the Accel Gen7. If its gonna be kept on the simple side, then I would look at transplanting a stock EFI setup.