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Old 12-11-2010, 03:01 PM   #1
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Post EZ-EFI Self Tuning Electronic Fuel Injection

has any one seen one of these on a 500. bolts right on to the manifold , will support 550HP and is under 2000?
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Old 09-07-2012, 09:18 PM   #2
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I don't know anything about the system you have asked about. I have been trying to find out information on the MSD throttle body fuel injection & ignition systems for my 68 cadillac convertible.
Anybody know anything about them? Thanks.
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Old 10-16-2012, 07:48 PM   #3
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I've installed 3 of the EZ systems including the one on my 500. Love them. Can't say enough good about them.

Just take your time and follow the directions very specifically. I've repaired 2 other installs by removing the sytem then reinstalling it and having no mor problems....not sure what the first installer did wrong
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Old 11-01-2014, 08:09 AM   #4
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I tried the EZ-EFI system on a 1968 472 installed in my 1995 chevy K1500. After over a year of tuning, I could never get it to run as well as with a quadrajet. The engine is slightly modified. - ported and bowl blended heads, mild performance cam & Edelbrock intake. I had problems with backfiring during warm up, very poor fuel economy and poor horsepower. This truck is equipped with overdrive and only runs 1600 rpm at 65 mph. I think this might be part of the problem with economy because the system uses a MAP sensor to partially control mixture. because of the low RPM cruise, the throttle is open wider, causing vacuum to be lower, thus the system makes the fuel curve richer - killing mpg. I think it says somewhere in the advertising that the system is not for use on overdrive vehicles, but I thought I could ignore that. Lesson learned. $2000 plus gathering dust on the shelf. I may try it again on another project.

It is very easy to install, and the self tuning feature works, but limits flexibility of fine tuning the system. My bet is it would work perfectly out of the box on a SBC.
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