Ok so I am going to install some injectors and when it comes to the new flow rate I am puzzled by my tables. From my understanding everyones graph is set linear with no slope... well mine is not like that. It looks linear but with a positive slope. I thought only the f-body guys had something like this going on. So what would you guys do, scale it just linear with no slope and work with the tune. Or use Red Hard Supra's spreadsheet for the calculations.

also if it has values that are increasing does this mean that my fuel pressure is not vacumme referenced? I am confused can someone explain this part.

 

Take a look at your fuel rail. If you have a return-system (which you should) and have a vaccum-referenced fuel pressure regulator, then your IFR table should be flat.

 

another question if is not vacumme referenced what factor or factors do you include into the formula when calculating the flow rate.

In other words how do you calculate the flow rate when your manifold vacumme is not at zero?

 

You need to know what the flow rate of the injectors is and then use this spreadsheet:

http://www.allmod.net/hpt/injectors.xls