It was said that the older EEC's only ran at 12Mhz and the 94/95 ran at 15Mhz.... it turns out the older ones also are clocked at 15Mhz.
Also, the supposed limitation of the older EEC's to handle 1450Kg/hr of air compared to the 1700 the newer cars can handle is actually not the limit. The limit is how high the load value can be calculated to which is 200% VE load, anything higher the EEC ignores, so you couldn't tune to higher than 200% load.
With just my setup with nothing scaled in the tune, I've datalogged the EEC calculating 207% VE load, and thats bringing in approximately 1000kg/h of air and running the 42's at 81% duty cycle. To get around this typically the tuner will drop the CID and injector sizes and so on by a ratio of the injector size increase from stock, so in my case it was .714 because I went from 30's to 42's. With this scaling down the peak load I've seen from the EEC is about 147%, which I can tune to since its within the hard limits of the Load factor.
I wondered why Dave had me rescale everything so I went digging for information because of curiosity
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The GURE strategy that the 89/90 cars have is very close to the GUFB strategy which covers the mustang A9L 5.0's, and theoritically we could run that GUFB strategy in our EEC's by flashing it to a chip. Of course you would need to edit everything to run our cars since the A9L is defaulted for 8 cylinders.... and no I'm not up for the challenge..... yet
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So far other than the load limit, I have not seen any limiting factor to how much air can come in to the engine except for how fast the A/D (analog to digital conversion) system works and that would have the MAF limited to almost 6000 kg/h
..... anyone there yet?????
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Also to note, Ford always calculates the highest VE the car can obtain at sealevel for every motor and puts this into a function called Load Scaling Seallevel vs RPM . With the 89-93 SC 3.8L motor, the max VE the car can do supposedly in stock form is 127% at 4000 RPM's at sea level. The stock HO 5.0L N/A has a max VE of 86% at 3500 RPM's at sea level.
Thats the way I see it.