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Post by corymck89 on Jun 22, 2016 8:38:30 GMT -5
No matter my ve table the first 10% of throttle my car runs rich (10.0 afr) and isnt smooth. Is there a setting some where im over looking?
Sorry i dont have internet access until tonight to upload a datalog and tune
Background: 2.3t car with an ms2 sequential
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Post by Stinger on Jun 22, 2016 9:09:07 GMT -5
Won't know anything until you upload your files.
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Post by wesk on Jul 1, 2016 8:33:36 GMT -5
Generally that means dead time is too high.
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Post by corymck89 on Jul 1, 2016 16:13:56 GMT -5
Sorry guys i been swamped at work and havnt gotten to get a datalog uploaded. I have low injectors (83lb) went i posted this my dead time was set at 0.63. Since Wes reply i have lowered it to 0.55 it has defiantly smoothed out and is not as bad. How low can i go with thia valve?
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Post by Stinger on Jul 2, 2016 12:00:21 GMT -5
You'll need to do some tube adjustments when you change the dead time value to get the AFR where it needs to be. You can certainly go farther if you find it needs more but where it's at now is as low as I'd expect it to need to be.
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Post by wesk on Jul 6, 2016 12:47:19 GMT -5
That is already as low as reasonable.
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Post by corymck89 on Aug 2, 2016 17:32:46 GMT -5
I have been having this issue with my car running rich the first 10% of tps. I have messed with the dead time, it did seem smother but still rich, (went from .45-.9) nothing cleared it up. thru town where I'm going pretty slow on and off the clutch/throttle it sounds like a v8 cammed out popping and misfiring around. it idles great 13.5-14.7 afr and runs great anything past 10% throttle.
current set up:
2.3 turbo
ms2 sequential
83lb holley low z injectors
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Post by corymck89 on Aug 3, 2016 5:34:59 GMT -5
Also while im thinking of it, a friend of mine pointed out that my ve table vaules are pretty low (20's at idle) is the normal for bigger injectors? Or so i have a setting wrong and am compensating for it on the ve table?
Thanks in advanced guys! Your help is appreciated!
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Post by Stinger on Aug 3, 2016 10:17:27 GMT -5
Dead time and idle VE numbers are directly related. Overly low idle VE numbers mean the dead time isn't accurate/correct. Your idle VE should at least be in the mid-high 40's, if not higher. I actually think your entire VE table is low since it's only in the 40's at 100% fuel load and 60's at 190% fuel load.
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Post by corymck89 on Aug 3, 2016 11:14:42 GMT -5
Ya i have no idea wats going on, runs good just not at 10%
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Post by Stinger on Aug 3, 2016 11:26:21 GMT -5
Dead time errors don't make it "run bad" above 2000 rpm or so and only make it run bad at low speeds if it forces a commanded PW lower than the linear range of the injector.
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Post by corymck89 on Aug 3, 2016 11:28:53 GMT -5
Is there a correct way to determine the right deadtime or just try and error? U believe it needs to go up or down?
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Post by Stinger on Aug 3, 2016 12:13:47 GMT -5
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Post by corymck89 on Aug 3, 2016 17:12:37 GMT -5
I tried the one method of starting at .80 and droping by.10 until the car stalls and it didnt really "stall" i droped it the whole way to 0.010 it got really lean and struggled to run but still ran. I then did as u said and added 0.2 = 0.210 and then went up the road and attepmted to correct the ve table and it ran pretty rough and seemed to make my table vaules drop even lower?
I also just double check my ohms on my injectors all read 2.4
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Post by Stinger on Aug 3, 2016 23:37:42 GMT -5
Whether it actually stalls or not depends on a lot of factors. If you ever end up below .55 or so then it is certainly not right.
The MS2extra link above says .6-.7 for low impedance injectors as a general rule.
I don't know your exact supply voltage but the Holley link above gives you the exact info you're looking for. Just cross your injector with your supply voltage and it gives you the dead time. Looks like it's in that same .6-.7 range if your voltage is "normal".
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