radkins

If so can you give me some insight on the settings you used to get them to stage properly. I am hitting a big lean spot during transition and have not found a way around it.

cewrx7r1

iTrader: (2)

What fuel are you running? If gasoline, then 1680 are way too large for primary injectors except on a drag car.

Best is to log ADVANCE functions and AFR for the event, then view AFR and the injectors as a chart.

radkins

Running E85. Here is a chart. It says they are coming on line but I cannot get away from the lean spot that happens right there.

I am wondering if the Power FC has enough power to open them up fast enough when they are barely trying to open being that it is seeing 4 injectors instead of 2. I have tried messing with pretty much all the settings, but have not nailed it yet.

cewrx7r1

iTrader: (2)

There is that initial wiggle after the secondaries come on. Are you running resistors or not or a FJO driver?

OK, we now need to see the injector setup. Best to load the complete DAT but Settings 5 is minimal acceptable.

radkins

Ok, here are some screen shots. Two things you will notice is the secondary injector is set to 1600. I had been running this setup on pump and thats the way I had it last year. Cant remember why but it ran fine. I have changed this back and forth and not noticed much difference. Also the sec in ms is set to 25 winch I thought was strange. This also was in the map from last year and I am not sure why. At some point I changed it. I cant remember if someone told me to set it to that, but I tried changing that back to the 1ms range and changing the secondaries to 3200 and the car was almost undriveable and I could not get it to clear the transition no matter what I did fuel wise, so I put it back. I have also tried varying amounts on injector lag with no success. These settings make the car run the best. At this point I feel I almost need to start over, but the car pulls really clean after the transition. so I dont know.

radkins

Forgot to add that I am not running resistors or an FJO.

This is the same tune I was using last year and the car was trapping 128 @ 26lbs on a TO4R. Still had a slight stumble sometimes, but I lived with it. Changes the turbo to a PT6765 and added a 90m Rotary Works TB and cant seem to get it ironed out.

cewrx7r1

iTrader: (2)

If you are runing 1600 primaries, then why are they set up as 850s?

This will mess up the tranistion to both sets up injectors.

radkins

I am running 850 primaries and 2 1680's for secondaries with the ground zero Manifold. The reason the secondaries were listed as 1600 is when I first added the second set of secondaries, in I didnt really understand how the Power FC staged injectors (not that I do now), so I kind of guessed at the base map without changing the Q setting and ended up getting it running pretty good so I left it.


I went out tonight and started from scratch from my old map before I added 2 secondaries. I changed the secondary Q to 3200 and set the transition back to 1ms. Initially as soon as the secondaries came on injector duty dropped way down and the car fell flat. I added tons of fuel at the transition point and got it to transition, but after never got it smooth. Durring transition the wideband swings from 16 to 10 the same as it was with my other settings no matter what I do. On one log a cell will be really lean, the next log it will be really rich. I am wondering if the power FC will open 4 primaries efficiently. Ralph from Excessive told me he used to run 4 1600's, but I tried PMing him to ask what settings he used. I havent heard back from him.

cewrx7r1

iTrader: (2)

OK me read bad! Then the secondary value should have been 3200.

The PFC can not handle that many injectors unles they are wired properly.
4 low impedance secondaries running as two set of paralled injectors can burn out the drivers. Adding resistors slow the responce time.

Wire two of them in series. Thus the impedance for one set is safe. But this also slows the responce time. Best to get a FJO drive box to drive the 4 1600s correctly and seperately.

Then you will have to play with the settings 5 secondary transition ms for best crossover.

You should have used the ID1000s on the primaries and a FJO driver with
ID2000s or Bosch 1600 on the secondaries. The large high impedance IDs
can handle idle better then stock 850.

radkins

I have them wired in series. I just bought an FJO. Tired of messing around with the Power FC. I have tried about every setting and it is still not smooth. I also like the fact that I will gain some duty cycle on the top end. Also like the fact that it is only $150.

Thanks for all your help!

cewrx7r1

iTrader: (2)

I have two Bosch 1600 secondaries and originally ran them with resistors. After installing a FJO driver, my full boost 16 psi duty cycle dropped about 7%.