Apexi s-afc onto rb30det????????

[25t]

boosted /guys

can you go into more detail with regard to the boost cut being calculated via time verses afm voltage,

do you meen that when the afm is maxed out on air flow the voltage across the "hotwire" is at its peek and the ecu has a time limit preset to shut things down???

cheers

[BOOSTD]

The ecu has a set threshold voltage for boost cut, however that volatge must be reached by a certain percentage of the time frame. This eliminates boost spikes and transients setting off the limiter. A boost cut defender stops the ecu seeing past a peset voltage or frequency limit. It is easy for the BCD to be set to low and lean out ur mixtures, because the first time it is set you might not get boost cut for a few days but the load the car up going up a hill and set it off. Subsequently the BCD defender get adjusted more still which in turn reduces your maximun fuel enrichment. So then the car starts leaning out and either goes bang or ur smart enough to do something about it so you increase ur fuel regulator pressure which gives you more fuel up top but stuffs up th rest of your rev range......as u can c u end up chasing ur tail. This is why we call it a patch fix.

[Guilt-Toy]

I have a r33 with a high flow t3 turbo (vl turbo)

hks exaust

medium front mount

CAI

i get boost cut on 12psi every time. If i install a Turbo smart type II BCD could my car run up to 18PSI without a SAFC ?

[25t]

thanks boosted /sydneykid

soo, whats better a z32 afm or bcd???

im not going to run boost any higher than 14psi as i still have the 25t turbo installed

cheers