Injector scaling and latecy for different injectors.
Nov 30, 2007, 08:59 AM
#256
All breather hoses are connected, running OEM bc solenoid and stock airbox. I made a painstaking effort to get the injector o-rings seat properly in the manifold. I do have HKS 264/272 cams and a ported hotside evo 9 turbo.
would this make idle leaner and ltft lo go positive?
would this make idle leaner and ltft lo go positive?
Last edited by Jorge T; Dec 23, 2007 at 09:21 PM.
Nov 30, 2007, 02:59 PM
#260
On my case, I advanced the timing to 7 and it idles very fine.
I think that the car is in close loop and will try to hit 14.7 AFR by itself. I would leave the idle fuel cells as default (14.7). If you get lean/rich conditions.... then it is a matter of fine tune your scaling and latencies.
BTW.... I am on PTE 780s (I posted my settings on this thread) and the car fluctuates from 15.5-14.3 at idle with and w/o AC. I am on GSC S1s!
Hope this helps!
I think that the car is in close loop and will try to hit 14.7 AFR by itself. I would leave the idle fuel cells as default (14.7). If you get lean/rich conditions.... then it is a matter of fine tune your scaling and latencies.
BTW.... I am on PTE 780s (I posted my settings on this thread) and the car fluctuates from 15.5-14.3 at idle with and w/o AC. I am on GSC S1s!
Hope this helps!
Nov 30, 2007, 04:50 PM
#261
lowering latencies@14v made ltft mid stay at -7.8 and made ltft lo go to +11!
scaling of "PTE 680" <(said on box) at 622 and latencies at
4.69 3.624
7.03 1.992
9.38 1.344
11.72 1.008
14.06 0.768
16.40 0.600
18.68 0.456
LTFT lo+1.6 /LTFTmid -3.5 and it's staying like this
scaling of "PTE 680" <(said on box) at 622 and latencies at
4.69 3.624
7.03 1.992
9.38 1.344
11.72 1.008
14.06 0.768
16.40 0.600
18.68 0.456
LTFT lo+1.6 /LTFTmid -3.5 and it's staying like this
Dec 1, 2007, 06:40 AM
#263
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This is for FIC 1000cc/min injectors. I wanted to drive the car around and start it in sub freezing weather before posting up my values. Car starts up and idles fine in all weather conditions. This is for a DSM but the code is exactly the same on the evo and the values will transfer over. I do not use a stock O2 sensor though, my ecu talks to my LC1's wideband signal for closed loop cruising. So if anything my trims should be more accurate/consistent than a stock narrow band sensor.
4.69 4.371ms
7.03 2.427ms
9.38 1.467ms
11.72 1.155ms
14.06 0.963ms
16.40 0.867ms
18.68 0.771ms
For the global you have to do some math. My base fuel pressure is 56psi. Higher fuel pressure is not a linear relationship with respect to flow. Thus 56/43=1.3. Then you take the sqrt(1.3)=1.140 and multiply this by my rated flow of my 1000cc/min at 43psi to get 1140cc/min. I set my global to 1150cc/min. So for an evo at 43psi base you would take your stock global injector size and multiply it by x when [new inj size/number in ecuflash]=x. If you have higher than stock base fuel pressure you must do the math above.
In the end it is fairly plug and play with a little math and those latency numbers. Like I said my **** starts up and idles in 20 degree F weather with very large cams and large valves. It can sit and idle for half an hour on end, cruises well, and returns 30+ MPG. For the most part, it drives better than stock.
I know of someone running 1600cc/min injectors on the stock ecu but don't know their values, sorry. I just know its easily done.
4.69 4.371ms
7.03 2.427ms
9.38 1.467ms
11.72 1.155ms
14.06 0.963ms
16.40 0.867ms
18.68 0.771ms
For the global you have to do some math. My base fuel pressure is 56psi. Higher fuel pressure is not a linear relationship with respect to flow. Thus 56/43=1.3. Then you take the sqrt(1.3)=1.140 and multiply this by my rated flow of my 1000cc/min at 43psi to get 1140cc/min. I set my global to 1150cc/min. So for an evo at 43psi base you would take your stock global injector size and multiply it by x when [new inj size/number in ecuflash]=x. If you have higher than stock base fuel pressure you must do the math above.
In the end it is fairly plug and play with a little math and those latency numbers. Like I said my **** starts up and idles in 20 degree F weather with very large cams and large valves. It can sit and idle for half an hour on end, cruises well, and returns 30+ MPG. For the most part, it drives better than stock.
I know of someone running 1600cc/min injectors on the stock ecu but don't know their values, sorry. I just know its easily done.
Dec 1, 2007, 08:33 AM
#264
At these new settings I can tell that drivability in traffic has improved greatly, idles like stock at stoplights(no more idle 17:1 AFR swings) and the herky jerky during partial throttle transitions disappeared. The jury is still out...still got to go redo open loop.
Dec 3, 2007, 09:10 PM
#265
hmmm....14 volts is pretty high...whenever i log my evo ix it's avg 13.78 idle and 13.6 cruise....maybe there's sumthin wrong with my car? i've been scaling denso 720's for about a month now...and the closest i got it was lo +1 and mid -3....scaled @ 622
Dec 15, 2007, 07:32 AM
#268
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Anyone got Scalings and Latencies for PTE 880s
Cant seem to get the Cruise Trim to level out from being too rich.
Cant seem to get the Cruise Trim to level out from being too rich.
Last edited by Ph3n1x; Dec 15, 2007 at 07:36 AM.