[guccieng]

here's the skinny: http://www.compcams.com/Technical/Ca...pdf/page16.pdf
here's an interesting testimonial from butler performance:
http://www.cpgnation.com/forum/fast-...ials-2187.html
it looks like more of a 'carb replacement' than an efi system. it doesn't use knock sensors or even connect to the ignition from what i can tell. does it only sense load via vacuum and mixture via wide-band O2 sensor? that's it? i can't see any maf, coolant temp, air temp, baro, throttle position, or anything else. seems kinda brilliant, actually. what do the efi pro's around here say?

[quicksilver97ta]

I'd like to know more about it too. It could 'get by' with just a MAP and TPS sensor but how well would that work without the other inputs? The other parameters will have to be accounted for some how. Butler gave it a good review but only tested it on an engine dyno.

[Murf'sDad]

Originally Posted by guccieng

it doesn't use knock sensors or even connect to the ignition from what i can tell. does it only sense load via vacuum and mixture via wide-band O2 sensor? that's it? i can't see any maf, coolant temp, air temp, baro, throttle position, or anything else. seems kinda brilliant, actually. what do the efi pro's around here say?

Note that in the description it says that OEM sensors are compatible. From that, one might conclude you would use OEM GM sensors for such things as the pressure, temp, etc., mounting them where you wanted. TPS is built into the TB. Since this is a Speed Density system there is no MAF. Mustangs used the system for years. And it doesn't control the spark. That's up to you. There may be possibilities it could, but that would probably be an upgrade to the XFI system.

MTC, Stewart

["QUICK-SILVER"]

Mounting directions clears up any questions

http://www.fuelairspark.com/ezefi/FAST4-152.pdf

It's just a real compact system

[Ben M.]

It's just throttle body injection (TBI). Without adjusting ignition timing or fuel mixture per cylinder, it's not modern EFI and is more of a carb replacement technology.

[quicksilver97ta]

The instructions mention a dual quad set up, that does sound cool. Twice as cool for twice the price.

[guccieng]

i called them and jim butler and they said the throttle body holds 3 sensors: map, temp, and tps. they said no other sensors, but the instructions clearly shows a coolant sensor. i wonder if the fans are adjustable? after reading completely: yes! so what makes the other efi's so much better than this one? is spark control going to make that much more power? i have my ignition dialed in really well. wouldn't this be all i would want?

[amcmike]

What the engine wants at WOT is not always truely linear. With ignition timing control you can maximize MBT at each point if you run it one a dyno. This is a turbo application, but it shows you the idea. http://www.ecutek.com/tuning/ignition/

Depending on the system, you can take advantage of other features, such as additional timing as the engine warms up, "start retard", barometic changes, boost retard, and if used with a knock sensor - adapting for pre-detonation in the case of poor fuel economy or extremely hot ambient temperatures.

[Mr_GTO]

Chris told me about the new FAST EZ-EFI system and explained that if was a true bolt-on system with no manual tuning required - only a few parameters needed to be entered on the hand-held controller. We have seen less than desirable results with other "self-learning" EFI systems so I was skeptical.

Despite my initial concerns, we set up a dyno test on one of our 461 cubic inch pump gas Pontiacs. We did a base line test using a Holley HP carb and after tuning, the engine made 572 HP. Ron and the guys from FAST then bolted on the EZ-EFI system in a matter of a few minutes, entered a few engine parameters in the programmer and the engine cranked right up.

After letting it idle for a few minutes, they made a full dyno pull. It made 570.5 HP on the FIRST PULL and came back down to a perfect idle. After a couple more pulls, the results got even better – in fact the engine finished up with an additional 3-4 peak HP and a great torque curve.

Needless to say, we were impressed and plan to test the system on even higher HP engines in the near future. I think we've found the perfect EFI system for our Pontiac muscle car customers. Bottom line, the EZ-EFI is actually quicker and easier to tune than a carb."



David Butler
Butler Performance
2336 Hwy. 43 South
Leoma, TN 38468
866-762-7527
www.butlerperformance.com


NICE!

[n2ogpsj462]

can you blow thru it? (boost applications)

[guccieng]

Originally Posted by n2ogpsj462

can you blow thru it? (boost applications)

i did read somewhere no boost or spray.

[roadrage david]

Any feedback on feul econemy????

[BigB]

do you need a return line to the tank for this?

[Scott65]

Yes, you need a return line. I just finished installing this system on my '65. Only had it on the road twice because of all the crappy weather around here. Seems to work good so far. No track time yet for performance testing. Planned on posting when I some performance results that were conclusive.

[superdutybob]

Doesn't look like a T/A shaker will work on it. No room for the drop air cleaner base. Too bad for us T/A guys!

Anybody know differently?

[guccieng]

looks good, scott! let us know how she does on the street in some real world situations, ok?

[Scott65]

I don't know about shaker bases, but my base has 1.750" drop and it works fine. It was the same base I used w/ the 825 Demon I had prior to this conversion.

[arrowem]

Did I just read no NOS

[taalltheway]

I just bought this system to be installed on the 501 stroker that will go in my 71 Firebird. I guess it will be ready in January and i will post my experience.