ve bin k-value - SR20 Forum
 
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#1 (permalink) Old 06-03-2009, 07:58 PM
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ve bin k-value

hey calum or anyone who's knowledgeable explain how the k-value in the ve bins was derived?

if the going from 259cc to 333cc injectors with de maf (using 31206 as the stock k-value number, is that correct also?) would the calculation be

24271 = (259cc / 333cc) x 31206?

also as i was searching i found that the ve injector latency is .70ms and the bins have .60ms. is there a reason for this also?

just asking questions trying to learn and understand. thanks guys.

Dave

'93 Nissan NX2000
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SR20VE w/ SR16VE Cams, Calum Basic ECU, 2.5" SSAC Header, 3" VRS Exhaust,

3" WAI, JWT Popcharger, DE MAF, VE Injectors, Ultra Ignition Wires, MSD 8969, Thermoblok Spacers,

Competition Clutch Stage 4 Kit & 9lb Flywheel, B&M Short Shifter, Cusco FSTB, Motivational RSTB,

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#2 (permalink) Old 06-05-2009, 08:39 PM
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anyone?

'93 Nissan NX2000
SHIFT_the lift
SR20VE w/ SR16VE Cams, Calum Basic ECU, 2.5" SSAC Header, 3" VRS Exhaust,

3" WAI, JWT Popcharger, DE MAF, VE Injectors, Ultra Ignition Wires, MSD 8969, Thermoblok Spacers,

Competition Clutch Stage 4 Kit & 9lb Flywheel, B&M Short Shifter, Cusco FSTB, Motivational RSTB,

H&R Springs, ES Mounts, B14 SE-R Wheels, Euro/JDM Rear Brakes, S13 Steering Wheel
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#3 (permalink) Old 06-19-2009, 07:53 PM
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any ideas?

'93 Nissan NX2000
SHIFT_the lift
SR20VE w/ SR16VE Cams, Calum Basic ECU, 2.5" SSAC Header, 3" VRS Exhaust,

3" WAI, JWT Popcharger, DE MAF, VE Injectors, Ultra Ignition Wires, MSD 8969, Thermoblok Spacers,

Competition Clutch Stage 4 Kit & 9lb Flywheel, B&M Short Shifter, Cusco FSTB, Motivational RSTB,

H&R Springs, ES Mounts, B14 SE-R Wheels, Euro/JDM Rear Brakes, S13 Steering Wheel
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#4 (permalink) Old 06-19-2009, 09:15 PM
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my personal VE bin uses a k value higher than the calculated # to acheve a good 14.7 afr across most of the rev/load scale (mind you this is with the o2 sensor disabled). i also use .70 lag time for the inj as it seems to have cleaned up my idle over the .60. now my 20ve also is using a n60 maf with N1 cams so that would also make it different then the test car calum used. the k value i have noticed will be different on most cars some close some alot more so due to slight differences in the setup.

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#5 (permalink) Old 06-20-2009, 07:08 AM
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You are calculating the new K value correctly, but this is just a starting point. Setups differ. I am using a K of 28873 for my SR20VE with SR16 cams, Fuji, and 2.5" exhaust. This value gives me the AFR that I am seeking at idle and through the light load parts of the fuel map. I honed in on this value through empirical testing on the road. My tunes also use .60 latency, I've never adjusted this parameter -- it's just the way that the bin came from Calum.

Last edited by billc; 06-20-2009 at 07:09 AM.
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