Black LS1 T/A

Injector Offset table changes is an area I need to explore.

I bought the new Seimens Deka Hi-Z 55# injectors and, though I observe more fuel delivery, I had to lower Inj Flow Rate values below calculated values for the Injector Size, Test Pressure and Rail Fuel Pressure in order to achieve zero LTFT's at WOT and below zero during cruise and part throttle.

After tuning for non-positive values, it ranges from about -1.6 to -14.0 depending on idle, low throttle cruise or modest %TPA.

I get about -1.6 to 0.0 at around 15% or more throttle.
It varies about -14.5 to -4.5 or so at around 0.6 to, say, 10 %TPA.
At idle, it drifts upward until it reaches about -1.6.

When I tuned it with calculations closer to actual size/tested PSI/Rail FP, this wide range of values just made me bump Inj Flow Rates down further and further keep LTFT's from going positive.

The question:
Is there any intelligent way to go about calculating and adjusting Inj Offset for injectors that are othjer than stock?
I think I understand someone has such an animal for SVO 42's. But, what about a set of injectors like mine?
Could it possibly be better to use such a table as used for the 42's as being at least better than the stock Injector Offset and go from there as an example?

Thanks

SS00Blue

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Black LS1 T/A:
<strong>The question:
Is there any intelligent way to go about calculating and adjusting Inj Offset for injectors that are othjer than stock?
I think I understand someone has such an animal for SVO 42's. But, what about a set of injectors like mine?
Could it possibly be better to use such a table as used for the 42's as being at least better than the stock Injector Offset and go from there as an example?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I believe I may have a spreadsheet for your application. When I get home I'll check, and if I have what you need, I'll forward it to you.

SC-

Black LS1 T/A

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SS00Blue:I believe I may have a spreadsheet for your application. When I get home I'll check, and if I have what you need, I'll forward it to you.

SC- [/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Cool!

michael@mlbuie.com

Thanks!

SS00Blue

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Black LS1 T/A:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SS00Blue:I believe I may have a spreadsheet for your application. When I get home I'll check, and if I have what you need, I'll forward it to you.

SC- </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Cool!

michael@mlbuie.com

Thanks! [/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Mike,
My Windows ME took a dump last week and I'm having trouble finding that worksheet. I'm about 90% sure it's the one you want. I'm going to keep looking.

SC-

Black LS1 T/A

Thanks! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I'll keep an eye out for it.

nevrenuf

I'd love a copy of that too!

tomc5@bellsouth.net

SS00Blue

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by nevrenuf:
<strong> I'd love a copy of that too!

tomc5@bellsouth.net </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So would I. Sorry fellas, I've looked everywhere. I just can't find it.
<img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
SC-

Black LS1 T/A

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SS00Blue:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by nevrenuf:
<strong> I'd love a copy of that too!

tomc5@bellsouth.net </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So would I. Sorry fellas, I've looked everywhere. I just can't find it.
<img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
SC- </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif"><img border="0" alt="[cry]" title="" src="graemlins/gr_cry.gif" /> <img border="0" alt="[cry]" title="" src="graemlins/gr_cry.gif" /> <img border="0" alt="[cry]" title="" src="graemlins/gr_cry.gif" />

Thanks for checking, though. <img border="0" alt="[driving]" title="" src="graemlins/gr_driving3.gif" />

Ragtop 99

iTrader: (7)

tomc5@bellsouth.net
michael@mlbuie.com

I assume you are looking for Chris B's injector offset.XLS model. It's in your inbox. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

You guys can ship it to others that ask for it.

Black LS1 T/A

Thank you very much. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I'm not sure if I will or even should use it, but I want to try to understand it.

I've been told by a tuner not to do it unless it is verifiable that the injector I use needs that specific offset, or I risk damaging the injectors
over time and even worsening the tune. I can see how that is true without him telling me that.

But, I want to see how it works.

Thanks, again!

SS00Blue

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ragtop 99:
<strong>I assume you are looking for Chris B's injector offset.XLS model. It's in your inbox. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That's the one! I know'd it was somewhere out thar...

SC-

Phate

iTrader: (2)

Can I get a copy of this?

scott.allen@earthlink.net

Thanks,

Scott

parish8

iTrader: (6)

can i get a copy too, i would like to see it.

cobra99vert@aol.com

thanks

JNorris

iTrader: (4)

Please send me a copy as well.

Thanks

John

jnorris404@aol.com

RedHawkWS6

another one for a copy

hawkinke@soc.mil

red ws6 99

you can get the file from http://ls1edit.slowcar.net/

But it does you no good unless you have the ford or whatever company made the injectors offset file. Even then it won't be exact

Gary