Fuel Injector Table Help

[cornerburner27]

I am trying to put the right injector data into the tune for my new setup. I am using a base 00' Camaro tune since that is the car it is for, and modifying it. I am using Bosch 39lb/hour fuel injectors which are obviously larger than stock. I am trying to transfer the fuel injector table from a more modern GM vehicle that uses these injectors over to my f-body tune. A few problems. First off, I have done a bunch of reading and it still seems a little unclear what cars exactly use these injectors. I do believe the G8 GXP and even the Z06's use these injectors. One of the major problems that I see is when I compare my f-body tune to other newer cars such as the G8 or Corvette. The F-Body tune uses the parameters of Flow Rate v.s. KPa for the injectors whereas the newer cars use Flow Rate v.s. Pressure (psi). If it is possible to transfer the injector data from one of these newer cars to my tune, is it a matter of just converting from KPa to psi, or is there more to it to get the proper table? Also, are there multiple tables involved in altering a tune for larger injectors or just this main table?

Injector Reference:
Bosch 0 280 158 051 (0280158051)
GM# 12576341

Thanks

[jakebdb56]

They're 41.7lb LS7 injectors... So, at 58psi they flow 41.7 lbs/hr. You can use this spreadsheet to help create the injector flow rate, http://www.marcintology.com/tuning/injectors.xls

Here's what it should be...

41.7007354 41.96062703 42.21891885 42.47564004 42.73081891 42.98448293 43.23665876 43.48737229 43.73664867 43.98451233 44.23098702 44.47609584 44.71986124 44.96230507 45.2034486 45.44331252 45.681917

It is possible to derive the correct flow rate from the GenIV data. The delta pressure is rail pressure, so once you know what the flow is at 58psi, you can translate that to this IFR spreadsheet for GenIII vehicles. As for minimum pulsewidth and offsets, you'll have to download say a 2008 Z06 tune to see what those values are and translate them to the format in which you're working with.

[DSteck]

I've posted the refitted data for LS1 PCMs... If you hunt the Gen 3 forum, you'll find it.

[69lt1bird]

I have it stored here for safe keeping.

http://ls1tuningguide.com/tuninghelpfiles.php Bottom of page.

[jakebdb56]

I have it stored here for safe keeping.

http://ls1tuningguide.com/tuninghelpfiles.php Bottom of page.

nice!

[cornerburner27]

They're 41.7lb LS7 injectors... So, at 58psi they flow 41.7 lbs/hr. You can use this spreadsheet to help create the injector flow rate, http://www.marcintology.com/tuning/injectors.xls

Here's what it should be...




It is possible to derive the correct flow rate from the GenIV data. The delta pressure is rail pressure, so once you know what the flow is at 58psi, you can translate that to this IFR spreadsheet for GenIII vehicles. As for minimum pulsewidth and offsets, you'll have to download say a 2008 Z06 tune to see what those values are and translate them to the format in which you're working with.

Great information! Thank you. I've still been surprised at how many different values I've seen these injectors listed at (kind of frustrating).

Also, thank you 69lt1bird (Awesome tables) and DSteck for your input.

I'm still a little uncertain that I understand the full range of tune modifications that need to occur for upgrading to larger injectors. So there is the Flow Rate v.s MAP table and the Injector Offset v.s. Voltage.... but what other tables must be modified as well? Do these 2 tables really control the majority of the injector function regarding different load, airflow, and rpm conditions? What about the Short Pulse Limit, Short Pulse and Min Pulse tables?

Again, thanks for the help guys. Despite doing lots of reading, I still find myself with many questions... many which might seem rather basic.