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PowerFC: Ran out of Load Points.

Cubes

By Cubes,
in Engines & Forced Induction

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Cubes Grand Master

Cubes

Posted
Posted

Hi ppls,

Bl4ck32 and I have an AP Engineering R32 RB20DET PowerFC.

We have ran in to issues (Bl4ck32 Specifically) where the load points are being maxed out preventing more boost and power.

We are both running RB30DET's, using the R32 RB25 head and RB30 bottom end.

I am making 176rwkw and Bl4ck32 is making 200rwkw.

I use load point 19 to make this powe rand Bl4ck32 uses load point 20.

The problem is the PowerFC appears to have ran out of load points. :rofl:

I have replaced my stock airflow meter with a Z32 item, it didn't change the load point used, only the voltage per load point.

i.e The Z32 AFM it now peaks at 4v (thats load point 19) vs the rb20 AFM at 4.9v (that was also at load point 19).

Bl4ck32 is using a Q45 AFM. Same thing, only voltage has changed not the load point used.

So.. The larger (not literally) AFM doesn't reduce the load point used, what can I and Bl4ck32 do now?

What load points are some of you ppls with PFC's using at WOT and what power are you making?

Any tuners out there care to shed any light on our brick wall?

Our Tuner is contacting Apexi to find out what he can do, he has used the Datalogit software previously and said it cannot change the load point scale.

I've attached a pic of the AFM Menu that is located within the Settings menu.

All of the AFM menu AFM items contain the same values.

I am thinking *hoping* this 'may' change the load points used if the 3.84-5.12v is changed from say 100% to 80%??

Similiar to the way a SAFC works.

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https://www.sau.com.au/forums/topic/78309-powerfc-ran-out-of-load-points/
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Bl4cK32 Grand Master

Bl4cK32

Posted
Posted
  Cubes said:
Our Tuner is contacting Apexi to find out what he can do, he has used the Datalogit software previously and said it cannot change the load point scale.

He said that it cannot change the load point scale, or that it needs some correction added to one of the tables.....me cant remember exaclty :rofl:

Cubes Grand Master

Cubes

Posted
  • Author
Posted

The tuner has no issues making 200+rwkw with other rb20's and their PFC's (Chris32) as higher load points at higher rpm = over 200rwkw.

However, I think it does come down to his lack of experience with the rb20 pfc. Generally speaking he does a good job tuning and tunes safe, not to mention he charges bugger all.

The only other tuning shop I would touch down this way want $600 (Tilbrooks).

Others have a reputation of breaking things and or simply not giving a good tune via the PFC.

It appears RB25 pfc's are calibrated differently as at wot and 200rwkw or so they are only hitting load point 15 max. So obviously a lot of head room.

Can ppls check out their Airflow menu? :rofl:

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

mine goes up to load point 16 or 17 on 9psi - RB30DET with 25 head in r33 with r33 pfc. Does this mean i will have this problem when i finally want to run bigger injectors for bigger boost ? they are running at 90% + atm and im only running stock injectors

Chris32 Veteran

Chris32

Posted
Posted

interesting...

Mine gets up to load point 16/17, somtimes 18

I wired in the Z32 and selected the Z32 AFM option, otherwise it wouldn't run at all with normal AFM selected

Could it be becasue the AP PFC uses a GTR PFC, and being configured for only the one AFM its using more of the map than it would with 2 AFM's?

I remember in a old Zoom mag they where talking about the fc-logit software being able to extend the map in regards to RPM, but I dont remember it mentioning load

Maybe SK could shed more light, as he runs FC-logit and the RB20 PFC on his R32 RB30 setup doesn't he?

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