Computers

[-scooter-]

hi guys,

i am looking at buying a silver top rb20det from import spares at winsor gardens in SA (i live in brisbane). i am just wondering if there is a difference between automatic computers and manual computers, meaning auto gearboxes and manual gearboxes???

Thanks

Dan

[Waldo]

apparently they are no differant there was an atricle about this in a HPI mag, with a bluebird wagon they did an auto - manual swap and they said they kept the auto computer, so i dont think it matters

[jas/slo32]

ive interchanged the computers and noticed no difference. the first rb20det i put in a vl was an auto cut and used the vl 5spd. i borrowed a computer out of a mates r32 5spd and there was no difference

[Butters]

There is a difference.

I have pulled the rom files of both a silvier Rb20 auto and a manual.

The main tables(fuel/ignition) are pretty much the same. The rev limit seems higher on the manual though(although this could be a fluke). The actual map files are not the same though.

From what I understand the auto softens the timing in the higher RPM so when you stand on it, during the gear change there is not as much tourqe.

Hence going from an auto to manual, a auto ecu would work ok, you just may find the top of your rpm lacking slightly. If you were to go the other way, manual ecu in an auto, you will find your gearchanges some what un-pleasant with the auto box at full throttle.