holley 4d_ efi changes??

[Ross Corrigan]

>>PS just read in hotrod dec/98 has one article w/ the 4di answering a 
>few of
>>my q's, the digital systems TPS is far more sensitive than the analog's
>>TPS.....so even thought the guy w/ this system upgraded to the 
>Again - just guessing here but I'd have a hard time believing they use 
>two different TPS sensors, one on the old analog and one on the new 
>digital.  Perhaps the author meant that the new *system* worked better 
>than the old one? 

No, he was clear they are different.
It says "the digital one uses a a more sensitive TPS that is able to read
the amount and the reate of throttle opening, with input from the MAP and
high-sensitivity TPS, the ECM discerns the difference b/t a slow rise in
throttle position vs. a quick one so that the accel. pump fuel/graph can be
altered appropriately to avoid bogging."  

one short writeup is at
http://www.whit.org:80/jcaudle/hefi.html   
not technical at all, just a simple comment on the system and its
tuneability/circuits




Ross Corrigan  /  Vancouver, Canada 

 '80 327ZX   IZCC#255, Edmonton Z-car Club #44, British Columbia ZCR        
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