Good read lots of info on the powerFC and datalogit.

http://www.newcelica.org/forums/showthread.php?t=258454

 

Mrgne, try searching in the single turbo, and 3rd gen sections of the forum. There are several very, very informative threads from as early as 2003 about the power FC and datalogits.

I think you will find more data here on the forum then any other forum concerning the power FC as it was one of the earlier plug and play units for the rotary.

cheers

kenn

 

The Celica PFC is strange. It has an unusual hybrid of the MAF-based (L Jetro) and MAP-based (D Jetro) PFC interfaces. For example, it has a MAF scaling chart in settings 3, just like the Subaru and Nissan L Jetro models. But it has a base map tab which is not used in any other L Jetro model that I have seen. The INJ vs TPS table appears to be an across-the-board addition of fuel based on throttle position, while on the D Jetro models (like the FD) it's more of a tip-in correction table.

The variable valve timing interface is a little unusual compared to other EMS's. The cam advance table is not a "relative" table, where normal operation is at 0 degrees and any cam advance is a positive number increasing from 0. Instead, it's numbered in absolute terms. So 50 or 55 degrees is basically zero advance, and then cam advance is any number less than that (intake valves opening earlier). You are counting "backwards." It's not the normal way of doing things compared to say Cobb. Interestingly enough, the lift setting is just a target rpm, in the same way that the Nissan s14 PFC configures their fixed variable valve timing system.

That writeup is moderately useful. For a beginner FD owner some stuff could be confusing because of the significant differences between the Celica and FD engine controls.