Power FC PFC & Altitude!
02-19-04, 08:56 AM
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PFC & Altitude!
A few questions about running the PFC at 5800ft elevation....
I am running the stock base map, and am running pig rich until WOT with the following mods:
-Full Exhaust (DP,MP,CB)
-Walbro 255
-Custom dual K&N Intake w/ Hard Pipes
Does anyone have any tricks for leaning out idle and partial throttle without going block by block?
Even at WOT at 14 psi I am still seeing rather rich conditions (per EGT's & PFC Knock). Anyone ever tuned one of these at high elevation? Does that much fuel need to be removed?
Sorry for the newbie post, and thanks in advance for your suggestions!
Greg Doyle
I am running the stock base map, and am running pig rich until WOT with the following mods:
-Full Exhaust (DP,MP,CB)
-Walbro 255
-Custom dual K&N Intake w/ Hard Pipes
Does anyone have any tricks for leaning out idle and partial throttle without going block by block?
Even at WOT at 14 psi I am still seeing rather rich conditions (per EGT's & PFC Knock). Anyone ever tuned one of these at high elevation? Does that much fuel need to be removed?
Sorry for the newbie post, and thanks in advance for your suggestions!
Greg Doyle
02-19-04, 03:00 PM
#3
Hooray For Boobies!!!
P.S. Be careful and do it little by little (.5 of a % each way, maybe less), you could blow your motor with one lean spike if you pull too much fuel out of the wrong area.
I am not sure how much the higher elevation will affect the car. I think the PFC can compensate for the less dense air.
I am not sure how much the higher elevation will affect the car. I think the PFC can compensate for the less dense air.
02-19-04, 06:48 PM
#4
Adjust idle fuel with the 1000 rpm PIM setting.
Adjusting the partial throttle across the rpm band is easily done using the voltage portion of the PIM settings but you better know the boost range for each voltage setting or you might be adjusting full boost fuel. You can collect data with a hand pump and some ingenuity.
Leaning out cruise and light load under vacuum is low risk. You can actually lean out until you get bucking and then add back a little.
Same with idle, lean out till you get a rough idle then add back until you are happy.
Adjusting the partial throttle across the rpm band is easily done using the voltage portion of the PIM settings but you better know the boost range for each voltage setting or you might be adjusting full boost fuel. You can collect data with a hand pump and some ingenuity.
Leaning out cruise and light load under vacuum is low risk. You can actually lean out until you get bucking and then add back a little.
Same with idle, lean out till you get a rough idle then add back until you are happy.
02-19-04, 09:46 PM
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I don't know what the compression ratio of this rotary engine would be but I calculated for anotyher vehicle that I had to run 17 psi at 6000 feet instead of 10.5 at sea level to have the same effective compression ration and therefore performance. I haven't done any real world tuning this is just the math. Theoratically if you have a map that works at sea level with 10 psi should work just fine with 50% more boost at 6000 feet.
Good luck
Claus
Good luck
Claus
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