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View Full Version : Help on IFR tables for Fbody/Holden (Ross/Paul)


Black02SS
October 10th, 2005, 06:16 PM
I was looking at a few tunes tonight with another member (Tordne) and came across something that I don't understand. From viewing stock tunes from a 2002 FBody/2002 VX Series/2004 GTO. Now from my understanding all three of these have the same Fuel Pressure (58psi stock) and injectors. Why the difference in IFR tables from one to the other. The Holden is WAY different and I a trying to understand why. Does anyone know the ratings for PSI and Injectors on the holdens?

Thanks
GMPX
October 10th, 2005, 07:00 PM
CHad,

The injectors changed on them in 2001, I have a set of 2000 injectors here that are marked as follows.

Bosch # 0 280 155 890
GM # 12555894

As for the injector flow table, I have no idea why the Holden one is like it is. Someone with more mechanical knowledge than I might know if there is a difference in our fuel system that needed the table defined like that. Another theory, the Engineer at Holden when the LS1 first came out decided to do that and it's just stuck ever since?.

Cheers,
Ross
Black02SS
October 10th, 2005, 07:05 PM
CHad,

The injectors changed on them in 2001, I have a set of 2000 injectors here that are marked as follows.

Bosch # 0 280 155 890
GM # 12555894

As for the injector flow table, I have no idea why the Holden one is like it is. Someone with more mechanical knowledge than I might know if there is a difference in our fuel system that needed the table defined like that. Another theory, the Engineer at Holden when the LS1 first came out decided to do that and it's just stuck ever since?.

Cheers,
Ross

Thanks. I have a tune from a 2002 Corvette that is different as well and I know it has the same injectors as a Fbody. :( Just wondering.
Tordne
October 10th, 2005, 07:50 PM
Just looked on my injectors and they have the following part # 0 280 155 931. From what I can gather (from a very quick search) this is a 28lb injector and was common across the 01-02 range.
Black02SS
October 10th, 2005, 08:06 PM
Just looked on my injectors and they have the following part # 0 280 155 931. From what I can gather (from a very quick search) this is a 28lb injector and was common across the 01-02 range.

That is interesting. So I wonder why they used a jacked up IFR table on the holdens then.