Adding PE = No Effect
Originally Posted by jimmyblue
Power enrichment mode is one of the ways to get
into open loop. Any time you see a commanded
fuel air multiplier <> 1.000 you are open loop. In
open loop the PCM will pick the fattest of the
currently enabled enrichments (PE, OLFA, COT,
whatever).
Anyway, when you meet the conditions to enable
PE, you enter open loop and then pick the chubby
option. If OLFA(MAP,ECT) is greater than the PE(RPM)
then you get the OLFA value.
This really gives you one and one-half degrees of
freedom in tuning WOT. A MAP based enrichment,
and an RPM based one. But the "pick fatter" limits
what you can do, some.
You might find it better to tune as far as possible
with the OLFA table, and then use PE just to tweak
the top end (where the injector table, etc. may fail
to properly model plumbing flow-pressure drop, etc.).
PE gets all the attention but OLFA and the MAP
relation to required enrichment I think is more to
the point.
into open loop. Any time you see a commanded
fuel air multiplier <> 1.000 you are open loop. In
open loop the PCM will pick the fattest of the
currently enabled enrichments (PE, OLFA, COT,
whatever).
Anyway, when you meet the conditions to enable
PE, you enter open loop and then pick the chubby
option. If OLFA(MAP,ECT) is greater than the PE(RPM)
then you get the OLFA value.
This really gives you one and one-half degrees of
freedom in tuning WOT. A MAP based enrichment,
and an RPM based one. But the "pick fatter" limits
what you can do, some.
You might find it better to tune as far as possible
with the OLFA table, and then use PE just to tweak
the top end (where the injector table, etc. may fail
to properly model plumbing flow-pressure drop, etc.).
PE gets all the attention but OLFA and the MAP
relation to required enrichment I think is more to
the point.
So what exactly is Engine Protection, seems like it is an OL table too ?
Thread Starter
Joined: Nov 2001
Posts: 3,066
Likes: 0
From: Sunny San Diego
Went back to the dyno. It was the OLFA table that was doing it.
Was able to get the AFR much better under the curve and with some extra timing, gained about 20-30lb torque.
Was able to get the AFR much better under the curve and with some extra timing, gained about 20-30lb torque.
