View Full Version : Help with start up tune
yzriders182
March 3rd, 2013, 07:06 AM
I have an 03 Silverado 5.3l that i just finished a turbo install and injector swap with a few other parts. Im going to run COS3 SD tune.
I have siemens 60# injectors and was wondering if you could look at my injector data and give me some tips for a start up tune.
Thanks for the help
yzriders182
March 4th, 2013, 08:50 AM
Any help? Like a list I should check in the tune? Injector data input help? Anything would be great.
joecar
March 4th, 2013, 09:25 AM
Where did you get the injector data from...?
Did you copy all the injector tables...?
joecar
March 4th, 2013, 09:27 AM
BTW: your PE Enable B3616 is pretty restrictive at 90% TP.
yzriders182
March 4th, 2013, 10:25 AM
Thanks for the quick response.
IFR B4001 was calculated using redhardsupra's spread sheet and info from another tune using 60's
Minimum Injector pulse width B4003 is from some data on the injectors I found on this forum. Its different then the spec sheet says so I'm not 100% sure its right. Spec sheet : http://www.siemensdekadealer.com/specsheets/FI114961.jpg
That's all I have adjusted so far with values I have found that others have used.
What else should I adjust for the injector compensation?
For B3616 should I adjust it to 100% tp?
yzriders182
March 4th, 2013, 10:32 AM
I haven't loaded COS3 to the pcm along with the stock tune yet. Should I do that first before I start to make further adjustments?
Again thanks for the help!
joecar
March 4th, 2013, 11:44 AM
Set B3616 to same as 2002 Camaro (65% below 3200 rpm, 35% above).
joecar
March 4th, 2013, 11:44 AM
Did the injectors come with any more data...?
yzriders182
March 4th, 2013, 11:57 AM
http://www.siemensdekadealer.com/specsheets/FI114961cs.jpg
I have this for them too.
Thanks I adjusted B3616
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ddnspider
March 5th, 2013, 12:52 PM
Is your fuel pressure referenced to manifold pressure? You flatlined your injector flow rate, which should only be done if you are referencing it to manifold pressure.
yzriders182
March 6th, 2013, 04:45 AM
Yes its an aeromotive FPR manifold referenced at 1:1
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