Finally done with 6 spd swap. time for injectors

[nocturnalsilence]

I am finally done with my 6 speed swap but now it is time to install my 30 lb svo injectors. Does anyone know where I can find a table with the values I need to change my program to. Thanks Dave

[tjwong]

Originally Posted by nocturnalsilence

I am finally done with my 6 speed swap but now it is time to install my 30 lb svo injectors. Does anyone know where I can find a table with the values I need to change my program to. Thanks
Dave

Dave you should just change the injector size constant to reflect the size of your new injectors. Also remember that the SVO injectors are rated at 37 PSI and not 43.5 as the GM fuel rail rating. To calculate the correct flow the formula would be:

( SQRT new pressure / old pressure ) * old flow rate

( SQRT 43.5 / 37 ) = 1.084

1.084 * 30 = 32.52

Also I would use the original injector offsets that are in your PCM now. Contrary to beleif its not always wise just to change those settings without first see where your fuel trims are.

I would make the injector size constant change to 32.5 lbs/hr then run the car and datalog it. If you see that the fuel trims are off to one side or the other then make the injector offset change. In most cases I have found that it isn't necessary to mess with them at all. Especially in cases where the engine has a new lumpy cam, skewed fuel trims can be caused by other changes.