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How do I calculate injector offset?

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Old Mar 28, 2002 | 07:20 AM
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Chris Jones's Avatar
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Default How do I calculate injector offset?

Anyone know how to set the injector offset table? I have 30lb SVO injectors. I have already set the injector flow rate table.
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Old Mar 28, 2002 | 10:26 AM
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Default Re: How do I calculate injector offset?

You don't

It's either provided with the injectors if you happen to get a flow match sheet with them or you measure it.

You can tweak it, but you get more effective results with the flow table.

Leave it as is
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Old Mar 29, 2002 | 01:11 AM
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Default Re: How do I calculate injector offset?

I know the SVO's have different values. Does anyone know what they are?
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Old Mar 29, 2002 | 01:39 AM
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Default Re: How do I calculate injector offset?

0.00 1.60 3.20 4.80 5.20 5.50 6.00 6.40 6.80 7.00 7.20 7.60 8.00 8.40 8.80 9.00 9.00 9.60 10.00 10.40 10.80 11.00 11.20 11.60 12.00 12.40 12.80 13.00 13.20 13.60 14.00 14.40 14.80 16.00 18.00 19.60
7.00 7.00 7.00 7.00 7.00 7.00 5.00 4.25 3.75 3.00 2.66 2.33 2.00 1.83 1.67 1.50 1.43 1.37 1.31 1.17 1.04 0.91 0.87 0.84 0.81 0.73 0.66 0.59 0.56 0.53 0.50 0.50 0.50 0.50 0.50 0.50

Those are the values I have for the SVO 24's - they were pulled out of a ford PCM by an individual on the LT1 Edit mailing list. I do not have any direct data for the 30lb/hrs. As a general trend when keeping the same injector style (pintle, etc.) larger flow equates to a slower offset, as does higher pressure (the former having a much larger effect)).

It's up to you to extrapolate a vacuum dependency curve for that - I still haven't got around to doing one <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Chris
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