Power FC: HOw do I raise the boost limit???
 

My '94 3rd gen runs fine on the Power FC, but at the moment we're running it conservatively at 7500rpm, and maybe 16psi boost (boost gauge not registering properly all the time..) I do know it is running very close, maybe 2psi either side of the 16psi, but this isnt enough. To race our car competitively, we need to run it at around 20 or 22psi, which is what this engine was built to handle. And we need to raise the rev limit (but I know how to do this.. no probs there..) to about 9000rpm, as it runs out way too quickly in each gear.
My burning question is this: How do I raise the boost level with this Power FC and Datalogit software? I'm running sequential turbos, slightly larger than stock, from SR Motorsports, and the engine is fairly low compression to handle boost, and the porting is not too wild (I dont know a great deal about porting on the rotary engine yet.. I will learn..)
So what do I do? Where's the datafield in the Datalogit software that says somehing like "Boost" or "Boost Limit" or something??? :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash: :wallbash:

It was my understanding that the PowerFC was maxed at 1 bar but probably I am wrong.

Not sure in the Datalogit, but the PFC will cut off at just over the boost set in the boost control. Even if you don't use boost control, you need to set that just over your max boost.

For running a lot of boost, the stock MAP sensor is the problem. I believe it's maxed around 17psi - never can remember that number, so I might be wrong.

Dale

1. You have to adjust the "target boost" setting to higher than what you want to run.
2. You should be using a separate electronic boost controller.
3. Those stock twins are completely inefficient above 15 psi. Running 20+ psi on stock twins is FUNNY -- this means don't try to do that.
4. You need a 3-bar MAP sensor to run above 16 psi.
5. Adjusting the rpm scale can be done and will require a full re-map. There's a current thread on this!
6. What fuel system do you have?
7. What kind of racing?

No offense, but it's obvious you aren't that knowledgable on modifying FDs...I would suggest consulting a good shop.

The stock map sensor is good to 17psi and flatlines around 17.5 to 18psi.
But to properly use it, you need to calibrate the PFC calculated ABS to real relative pressure.