Ok i was just making sure i understood correctly. that means adding the launch limiter isn't too hard, but the launch limiter would use a fuel cut rather then ignition cut.. Correct? At least until you have a better understanding and then "maybe" the limiter can be changed from fuel to ignition?

Obviously I'm not looking for a free copy, you would get money. If possible you could even offer the copies on supra owners, and potentially make a fair bit of money. I'm not sure what the cpu would cost from AP or Apexi who ever it would be to get this from. I'll do most of the leg work if we could work something out with this. If not I'll just stop wasting my time on this.

Correct. The rev limiter change only required a "local" chance, that means only a few lines are involved and you use an existing feature, you are just using a different RPM setting.


I first need a working simulation environment where I can simulate a run (sensor values) and then monitor the outputs. I need some equipment for this which has some weeks lead time so I can't start doing this before end of May.

There are a few problems with the original FC Pros.

a) They only work with the old style PFCs with socketed processor which only a few have.

b) I would have to get a hold on a FC Pro CPU for the model.

c) It is not possible to get a programmer for the old processors anymore. You don't even find any information about the series on the NEC website anymore. But I just bought an old book about development for the series where the author talks about programming them with the quick-pulse algorithm. So it might be possible with equipment I have but I have to make a custom adapter.

d) I'm not sure whether you can even read the content of the old CPUs.

e) The CPU isn't produced by NEC since a few years. But I found some on the list of suppliers from China, but each CPU would cost $50+.

f) Legal problems. Apexi might not like others to clone their Pro CPUs. But then again they don't sell them anymore, so they won't lose any sales.

There might be an other change to replace the internal program, but I don't have an old style spare PFC, so I can't do any work here as of yet.

When I or someone else has solved the reading/writing problem with the old style CPUs than we can go on from there.

FastHatch, any progress in munipulating the code on the regular PFC?

Sorry, no time yet. Only new feature I would like to reveal as of now is a EPROM editing feature in FC Tune.

Just a few samples, please ignore the charts, I haven't updated it to match the enhanced grids because the chart control will entirely be replaced by a new one.

http://www.fctune.com/pics/accel.png

http://www.fctune.com/pics/cold_start_enrichment.png

http://www.fctune.com/pics/cranking_bin.png

looks exciting, good work and keep it up.

Thanks. Although it might seem like FC Tune is dead, it is not. I'm working on it plus much more every day.

http://andre.honda-tech.de/powerfc/fcc/DSC00006s.jpg

http://andre.honda-tech.de/powerfc/fcc/DSC00008s.jpg

http://andre.honda-tech.de/powerfc/fcc/DSC00009s.jpg

Subscribed!

Is there anything in there for POST start enrichment?

thewird

Hi all,

A friend of mine got Apexi Ecu (78F4046) and renesas unit (FP5) for RX7FD3S. We like to do few mods in the firmware. I am just wondering where or how can I get a firmware source code? Do you know what compiler or development environment is required for it?

Thanks,
Peter

I would LOVE my PFC to ignition cut instead of the dangerous fuel cut!

but looks like this never came about? :(