fiestaturbo.com

[AceFrst]

Hello i own a 1991 H reg Fiesta rs turbo fitted with the OFAB ECU. I am fully rebuilding the engine with Lo-comp forged pistons, Arp rod bolts, T3, beige injectors, front mount ect. Obviously i need a chip to adjust the fueling and ignition to cope with the boost i am looking to run. I have a friend that also had a fiesta rst running similar spec but with a OFAC ECU with a stage 2 195 chip fitted. He had an unfortunate drifting accident resulting in the car being written off. My question is that would my car run if i change my OFAB ECU for his OFAC chipped one?

[Ruishy1]

yes, but you need to change a few pins on the ecu, aswell as adding the OFAB MAP sensor, but yes it can be done and its not too difficult

[AceFrst]

Ive read that the OFAB ecu is better than the OFAC so would it make more sense just to buy a 195 chip for my ecu?

[HCS PIMP]

yeh but whats cheaper

[Ruishy1]

its diff' strokes for diff' folks mate, the ofac is newer and more sophistaicated, but your limited with the map sensor, to circa 1.2 bar IIRC, whereas the ofab you can mount a cossie map sensor, so alot more boost is possible.

Although im sure there is now a 2.5 bar upgrade for ofac

[AceFrst]

Thanks for the help. Will play it safe and just get my ECU chipped.

[Ram]

its diff' strokes for diff' folks mate, the ofac is newer and more sophistaicated, but your limited with the map sensor, to circa 1.2 bar IIRC, whereas the ofab you can mount a cossie map sensor, so alot more boost is possible.

Although im sure there is now a 2.5 bar upgrade for ofac

hi mate, anymore info on this ofac boost upgrade? i heard msd can do it awhile ago but wondering if you know of another way/place? im on ofac but want more boost

[Ruishy1]

dont have more info, sorry, but if i hear anything il let you know

[Ram]