Mass Flo EFI Running
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Laughing Gas
Joined: Jul 2002
Posts: 843
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From: USA
Mass Flo EFI Running
Well, I finally installed the Mass Flo EFI system on my truck. While it is plug and play it is not bolt-on. Lots of work and fabrication and minor aleration on the truck. I plan to write a tech article with lots of pictures. How does it run? HOLLY MOSES!!!!!!!!!!!! I can feel the difference in the power and I believe the gas milage although I haven't gotten that far yet. The driveability of the system is great. My ole Ford loves it. 
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I would like to hear/see more about it since I am considering it for my 1978 crew-cab. I am just finishing my 400 rebuild this weekend with parts from TMI and would like to add fuel injection as soon as I recooperate from the rebuild a little! Congratulations on yours!
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Joined: Oct 2005
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Glad to hear it!!! Now get working on that article so I won't loose what's left of my hair trying to figure out my system when I do the same thing!!! How about an update as to mileage improvements as you use the system??
Glad to hear it worked for you!!
Glad to hear it worked for you!!
Postmaster
Joined: Aug 2001
Posts: 4,270
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From: Delaware
Good work. I was well on my way to building my EFI when I became aware of the Mass-Flo setup. Otherwise I may have gone that route.
I am interested in hearing about how much fabrication was required. The most attractive part of the Mass-Flo setup is the simplified air intake.
I am interested in hearing about how much fabrication was required. The most attractive part of the Mass-Flo setup is the simplified air intake.
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Laughing Gas
Joined: Jul 2002
Posts: 843
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From: USA
Originally Posted by danlee
Good work. I was well on my way to building my EFI when I became aware of the Mass-Flo setup. Otherwise I may have gone that route.
I am interested in hearing about how much fabrication was required. The most attractive part of the Mass-Flo setup is the simplified air intake.
I am interested in hearing about how much fabrication was required. The most attractive part of the Mass-Flo setup is the simplified air intake.
The air intake system wasn't that simple. I chose to keep the origional cold air intake system on the truck and there are clearence issues between the fuel rails and the air cleaner housing and clearence issues between the top of the mass Flo sensor and the cover for the air cleaner. Mass Flo wants a 1" gap between the top of the sensor and the cover and it isn't there without using a spacer somewhere. I'lll eventually get some pics posted.
Postmaster
Joined: Aug 2001
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From: Delaware
Originally Posted by garypettengill
Some more good news to this project, my fuel milage went from the standard 9-10 mpg to 14-14.5mpg, mixed driving. Look out if I decide to overdirve this thing.
The best I ever got with a carb was about 13 MPG, and 10 MPG was typical.
I doubt that I will ever save enough fuel to offfset the cost, but the drivability improvement makes it worthwhile.
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From: buffalo wyoming
installl article on ford muscle site
Postmaster
Joined: Aug 2001
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From: Delaware
The Mass-Flo computer is an EEC-IV similar to the '93 'stang computer (A3M) that I used. A donor mustang with computer, harness and sensors will keep the cost down, but that requires a programming device like a Tweecer. I used a Walbro GSL 2?? external pump (255 L/hr), which is probably cheaper than the Holley shown in Ford Muscle.
The big trick is to program the EEC-IV computer with the proper MAF Transfer Function. That has to be supplied by Mass-Flo, if you don't buy their computer. You also need the GM to Ford Sensor Interface box to convert the TPS signal from GM to EEC-IV levels.
The big trick is to program the EEC-IV computer with the proper MAF Transfer Function. That has to be supplied by Mass-Flo, if you don't buy their computer. You also need the GM to Ford Sensor Interface box to convert the TPS signal from GM to EEC-IV levels.
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Laughing Gas
Joined: Jul 2002
Posts: 843
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From: USA
Originally Posted by danlee
The Mass-Flo computer is an EEC-IV similar to the '93 'stang computer (A3M) that I used. A donor mustang with computer, harness and sensors will keep the cost down, but that requires a programming device like a Tweecer. I used a Walbro GSL 2?? external pump (255 L/hr), which is probably cheaper than the Holley shown in Ford Muscle.
The big trick is to program the EEC-IV computer with the proper MAF Transfer Function. That has to be supplied by Mass-Flo, if you don't buy their computer. You also need the GM to Ford Sensor Interface box to convert the TPS signal from GM to EEC-IV levels.
The big trick is to program the EEC-IV computer with the proper MAF Transfer Function. That has to be supplied by Mass-Flo, if you don't buy their computer. You also need the GM to Ford Sensor Interface box to convert the TPS signal from GM to EEC-IV levels.