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Originally Posted by TitaniumTT
The FPR will take care of most of the difference as far as tuning goes.
Mazda doesn't always do the best job of economy. I have a friend of mine, we went out and street tuned his Rtek one night and he got something like 28mpg on the way up to canada. Now, granted this was an n/a but I never got close to that when I had a ecu.
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Well, before all these fuel related problems and subsequent upgrades I got 17/25 like clockwork. I'm just trying to get back there, I'll tune the rtek when I get a chance and hopefully I can shoot for that 28mpg mark. At least now I don't have to get 13mpg while I wait.
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Bottomline is, using the stock Rtek map is a weak excuse for wanting to keep a voltage reg. Lower voltage means higher amps, I'm not sure why Mazda did it that way, but I don't think it's needed, therefore it goes away.
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"
You" don't think its needed. "
You" would also work 48 straight hours for the privilege of driving another 14....
"
You" would also spend the time/$ to fine-tune the drivability portion of your map to near perfection. "
I" don't possess the resources in $, skills, or patience to commit to doing that at this time. what "
I" know is that of all the FC people (not running a stand alone.....and most who are) who have re-wired their fuel pump for constant 12v do not get acceptable fuel mileage for a daily driver. Lol.
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First time I've heard of a pump burning out for no reason, there must be a reason...... could be low voltage caused by a bad voltage reg 
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:lmao: could be, I don't know anything about the FD voltage regulator....apples to oranges.