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Old 06-28-2007, 10:12 AM   #1 (permalink)
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Injector latency and IDC question???

How critical are the latency settings at 4.69v and 18.68v? These are the ends of the scale and will the car ever see thes numbers?
Is there a realationship between injector scaling, latencies, and IDC? After a couple of WOT logs I'm seeing a peak 95% IDC. This is based off of evoscan IPW and and the calculator here;
http://www.stealth316.com/0-frames.htm
technical/calculators/injector duty cycle
Is there something I can tweak to bring that down. Maybe rescale and tweak latencies? My guess is to turn the boost down a pound.



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Old 06-30-2007, 09:19 AM   #2 (permalink)
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I'm gonna try putting the stock air box back on and get busy leaning out the fuel maps.



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Old 06-30-2007, 02:54 PM   #3 (permalink)
 
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I have a feeling the range of voltage values is misleading. A significant number at the end of the table may have an effect in normal day to day use.

as you are figuring a latency value doesn't really change you duty cycle. in closed loop it is overruled by the o2 sensor and in open loop your map is the culprit for how much gas is used. now your latency will cause a slight plus or minus within your map but the tune is the fix.
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Old 07-01-2007, 10:25 PM   #4 (permalink)
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Thanks nothere. It turned out to be the fuel maps. Since I'm just starting out the fuel maps were still pretty close to stock. When it would get up into the higher load cells it was still refrencing the stock fuel number of 8.7. Asking for that much fuel from the 650's... No wonder it ran like crap up top. I've started to lean things out out and it's running like a champ. The last log saw a peak of 85% IDC and I still have more fuel to take out.



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