VLT Accell enrichment

vn_luke · Post by **vn_luke** » Tue Aug 19, 2008 4:07 pm

Hi guys - Could I get a bit of info on how Accell enrichment works on the VLT ecu?

"accel enrich is handled by the standard airflow meter overshoot, rather basic, not maps for this function like the latter nissan ecu have that rely on a throttle postion sensor, which the rb30 does not have anyway. " (RB30POWER)

I don't entierly understand this 'airflow meter overshoot'... (and am running a z32 afm, if that helps?

Cheers,
Luke

Matt · Post by **Matt** » Tue Aug 19, 2008 6:41 pm

When you release the aceelerator whilst going off boost you may get a rush of air in reverse through the AFM. It measures this and then ECU injects accordingly

The earlier ECUs like RB30 dont have a TPS variable voltage sensor to determine if this occuring

There is no acceleration enrichment table in the RB30 ECU for this reason

vn_luke · Post by **vn_luke** » Tue Aug 19, 2008 9:18 pm

Ah i see

How responsive should I expect the AFM to be? with it mounted before the turbo, should I expect to run into any 'afm reading delay' issues? (i.e. is it a common problem?) - or is this really something I need to experiment with for myself?