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Injector swap tuning W/ HPT

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Old 12-28-2004, 09:54 AM
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Default Injector swap tuning W/ HPT

How do you adjust for 30lbs SVO with HP tuners??

In details please still a newbie with this new software.
Thanks
Old 12-28-2004, 12:41 PM
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injector flow rate, to the set injector size, and then change injector offset tables untill your ltrims are back in line, . and after that is set, then setup your pe vs rpms.
Old 12-29-2004, 10:52 PM
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You need to adjust your Injector Flow Rate Table. This is very easy.

Use this calculator:
http://www.blackls1ta.com/Tools/JohnsInjectorCalc.xls

Enter the values in the top such as:
Test Injector Flow Rate: 30
Tested Pressure: 43.5psi
New Fuel Pressure: 58-60psi

This is assuming they have been flow tested at 43.5psi which they probably have and that you are running stock fuel pressure which is about 58psi. If you dont have one, get a fuel pressure guage.

The values that come up in the bottom chart are the ones you need to use in the HP Tuners software for the IFR Table
Old 12-29-2004, 11:59 PM
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why does everyone use 43.5 when 3 bar is 44.1 (14.7*3) and 4 bar is 14.7*4 (58.5)
Old 12-30-2004, 07:33 AM
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Originally Posted by HumpinSS
why does everyone use 43.5 when 3 bar is 44.1 (14.7*3) and 4 bar is 14.7*4 (58.5)
Good point, but the sheet that comes with the injectors should say tested at xx.xpsi Either one will be close enough to get the car running, then just need to play with the values to tune the Ltrims
Old 12-30-2004, 09:22 AM
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fortuanetly for our purposes it doesn't matter what value is used... we could use 3 for 3 bar and 4 for 4 bar... so long as 1 is 1 bar and 4 bar is 4*1 bar and 3 bar is 3*1 bar ...

Maybe whomever first created fuel injectors was at a different altitude whereby 14.7:1 wasn't air pressure?
Old 12-31-2004, 03:33 PM
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i will have to tune for the new fuel injectors i have. i went to the ls6 ones, i have to tune for the bolt ons, maf and injectors. how will i do this with them all on the car now? i can put a stock maf on there but what about the injectors?? sorry to barge in on your post but i never thought about the injectors
Old 12-31-2004, 05:07 PM
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its just easier and more exact to fix one change at a time. . that way you arent hiding or fighting any other sensor..
Old 12-31-2004, 07:34 PM
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maybe someone can pm me about it but what should i do? should i put the stock injectors back in or what? or is there any specific scale to go from 26.4 to 28.8?




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