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Ms 1 3.0 question


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You have to measure it. It is the time in milliseconds added to or subtracted from pulse width based on battery voltage. So if a given pulse width is 2.0 at 13.5 volts and the correction is 0.20 mS/V then the pulse width at 12.5 volts would be 2.2 mS to inject the same amount of fuel. 0.40 does sound kind of high, I don't think it's a function of injector volume delivered, you could always jump on www.injectordynamics.com and look at their data.

 

 

http://injectordynamics.com/wp-content/uploads/2013/03/The-Library.jpg

 

 

Are you looking at the titles of the books?

 

If you have a test apparatus you can run the injector at different voltages and get the correction. You can do the same for dwell battery correction, it takes longer to fully saturate a coil (or injector) at lower battery voltages, but again if the information is not provided by the supplier of the coils or injectors in your case you have to build a test system to measure it. Or guess, which is almost always less successful.

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I'd like to read THOSE books :)

I have left mine at the default levels. I don't see any issues but I'm sure it's not optimal.

 

Are you getting wild voltage fluctuations? BattV should be pretty steady the entire time. Give or take a couple hundred millivolts

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I just did go over to the injector dynamics site and check, their 850's have a 0.09 mS voltage correction and the 2000's are 0.06 so it probably does not correlate to injector size.
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Clicking on your links just opens up my mediafire acct

 

But the link you sent me via PM works fine.

 

Looking at your battery voltage it is a little noisy but I don't see any big spikes indicating a wiring problem. I had similar problems with a noisy BattV signal and installed a 47uF capacitor between Q3 and Q9 to help filter out noise induced by using the PWM circuit. It worked wonders.

 

I don't see any PW spikes caused by the battery noise though so I don't think it is causing you any problems.

Edited by psu_Crash
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