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I think it all really depends on what the purpose you have for the car is. If you are after basic/intermediate levels of tuning for street and the occasional track day, it's tough to go past the PowerFC as it's pretty much plug n play and can do nearly everything most people want.

If you want the best of the best and have the $$$ for it, you're definitely looking at either the Autronic or the Motec ECUs. Both have more parameters and controls than you could ever use but neither are plug n play and take plenty of time to install, tune and properly setup if you want all the goodies.

Have a look at the following threads for more info:

http://www.skylinesaustralia.com/forums/in...tronic+power+fc

http://www.skylinesaustralia.com/forums/in...r%20fc&st=0

http://www.skylinesaustralia.com/forums/in...p;#entry1024327

http://www.skylinesaustralia.com/forums/in...mp;#entry931292

http://www.skylinesaustralia.com/forums/in...mp;#entry716558

That should keep you going for a little while otherwise try using the search option in the top right of the menus.

you sound confused

i think you mean to wish to remove the factory airflow meters

600hp is fine with airflow meters

but if you insist motec and apexi powerfc will support no airflow meters

safc II will not support no airflow meters and wont go anywhere near 600HP

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