JonoT

Been driving with the stock injectors on Ms1 for awhile now with very high duty cycle. Decided to swap to 1600cc secondaries to increase fuel.

Settings:
Staging factor = 131 (stock primary/1600cc secondary with resistors)
Staging delay =100 cycles
Staging = 3800 with delta 200 RPM, map at 110 with delta 10

My question is that if I decrease my staging delay will I get rid of that really annoying spike from the secondaries shown in my datalog?
Any other ways I can smooth out the transistion?

Thanks

muythaibxr

It looks to me like both primary and secondary are higher than they should be and then drop after... I believe you're hitting accel enrichment.

Ken

dpf22

I use a delta of 5kpa and delay of a very low 28 cycles and get a butter smooth stage. Try gradually going down in 10's on the delay. I think you are a bit long on it. probably try 75 and see what happens. You'll know very quickly. I have noticed that with a map that has a steep curve in the fuel map, the larger the delta (in kpa) the more drastic the staging acts. Especially when you change the delay.
I use 720 prim and 1680 secondaries and I have a staging factor of 170 though. does your map dip after the stage, or does it keep a similar curve to the primaries? If it dips, you might turn the factor down, if it is steeper, you might try turning the staging factor up.
Just mentioning what I have experimented with over the years. Takes a long time to get the gist of how every setup likes to act. I run no resistors though. This changes the injector behavior especially low impedance ones. They react slower

JonoT

Thanks for the help it's really appreciated.

Here is a datalog from today showing 50 cycles. The arrow is pointing to duty cycles 1 & 2. I have also reduced my accel enrichments to try and stop the overshoot that Muythai was talking about.

dpf22 is the dip from duty cycle 2 what you mean?
I also changed my staging off factor for rpm to 5 as 2 was causing the staging to alternate on and off too much.

dpf22

Staging is definately causing you to go quite rich. I would delta rpm at around 2 (200 rpm) You have a steep progression in your fuel map which is harder to tune around but try going down as low as 20 cycles and see what happens. Looks like it wasn't quite as rich of a spike at 50 cycles. You want the afr to stay stationary if not go just a tad rich where you are transitioning the injectors. Smooth is key.