as subject.

whats the advantages and disadvantages.

im thinking of using the ofac ecu for the efi management on a 2.1 zvh, simply because of the ease of converting a efi 3i or 2i loom to run it.

 

have a search for it on here mate.

quite a bit of info

ofac is frequency based
ofab is voltage based

you can use the 3 bar cosworth type map sensors with ofab and hence potentially can be seen to have more tunjing scope.

ofac - iirc MSD in blackpool prefer the ofac system and can still map them for decent boost levels.

best speak to the people you intend to get the car set-up or mapped/chipped by

 

Just go cossie I'm running ofab at the mo

 

There is a ofac ecu with chip on ebay and a ofac loom

 

got the link?

 

ofac is suppose 2 be better, as it was redeveloped 2 replace the ofab on the newer fiesta rs's.

but as said above, most run ofab as it can have a 3bar mapsensor where as ofac is 2.5bar

 

O Fab! is what we say when something unexpectedly works.

O Fac! is what we say when something unexpectedly breaks.

 

The Knife,

 

PMSL

 

speak to gadget

 

So looks like going ofab then? the only problem is ive been told in another post that a normally chipped ofab ecu wont allow you to run the 3 bar map sensor? i know that a the map sensor this needs doing :

At the MAP sensor multiplug...
1) Move the brown wire (gnd) to cossie MAP sensor pin no. 1 (marked on multiplug).
2) Move the brown/trace* wire (feeds back to ECU on pin no. 26) to cossie MAP sensor pin no. 2
3) Move the brown/yellow wire (feeds from pin no. 27 on the ECU) to cossie MAP sensor pin no. 3
4) On one of the Cossie MAP Sensors fixing holes there is a metal ring which goes into the sensor. This ring must be earthed, and when you mount the Cossie map sensor using the right brackets, it connects to earth. (You should only ever mount the Weber/Cosworth MAP sensors with the vacuum pipe pointing downwards).

been doing my home work.

im sure an unlimited boost ecu is quiet capable?