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siemens deka injectors any good?

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Old 07-01-2014, 08:19 PM
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Default siemens deka injectors any good?

i can buy some slightly used siemens deka 80lb ev6 injectors, anybody having any trouble with them? where do i get the tuning data from?
Old 07-01-2014, 08:33 PM
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They are excellent however in tuning them you will need to keep fuel pressure down until boost comes in.
Old 07-01-2014, 08:39 PM
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you mean run a 3 bar base pressure instead of 4?
Old 07-02-2014, 11:53 AM
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I liked mine. Basically some people will tell you they have trouble maintaining stoich at high vacuum situations. Like a deep decel or idle for some people they will go rich. Mine did this, but I cant exactly blame the injectors. I dont know if the data was every full correct and I didn't have an adjustable fuel pressure regulator. Still either with, I like the injectors even with them going rich on decel.
Old 07-02-2014, 12:06 PM
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I had zero problems with mine. What software are you using?
Old 07-02-2014, 01:39 PM
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Originally Posted by MechE
you mean run a 3 bar base pressure instead of 4?
We used a vacuum referenced fuel pressure regulator. The Walbro 450 we were using and free flowing fuel system resulted in over 70psi. So in vacuum we cranked the fuel pressure down to 40ish and allowed in to rise a it got into boost. It made the truck much more street able and mild mannered while allowing it enough fuel when on the throttle.

The rich condition on Derek mentioned above was an issue prior to referencing the fuel pressure.

Originally Posted by Gadgetized
I had zero problems with mine. What software are you using?
It is likely you had fewer problems due to the more thirsty motor which could eat up the extra fuel more easily.
Old 07-02-2014, 04:42 PM
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im using hp tuners and i have a boost referenced fpr
Old 07-02-2014, 07:58 PM
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In HPT cut the minimum fuel milligrams in half. That will allow you lower pulse widths at decel. You shouldnt have any problems after changing that.
Old 07-02-2014, 08:16 PM
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awesome.. thanks man
Old 07-03-2014, 02:24 AM
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Originally Posted by Gadgetized
In HPT cut the minimum fuel milligrams in half. That will allow you lower pulse widths at decel. You shouldnt have any problems after changing that.
What base pressure were you running?


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