Does anybody actually use this table, and if so, what is the formula that people use to compensate for the change in pressure across the injector.

I have all of the data for my 42# SV0 injectors, but its in 3 bar vac referenced. I need to translate it to 4 bar static.

Or is my thinking correct, that nobody on here goes this far when changing injectors.

Ryan

 

I think that you are stating two different questions. Compensation for battery voltage is how an injector changes flow if the voltage to it changes. Less voltage causes an injector to flow less and vice versa due to the speed that the internal pintle, ball or disc moves. This varies from brand, style and size of injectors. We had a drag car without an alternator that was dialed in, later he added an alternator. Car slowed way down because he went rich due to a mismatched battery voltage compensation table.

Injector flow per Bar is different. a 42 LB/Hr injector flows approx 48 LB/Hr going from 3 bar (43.5 psi) to 4 bar (58 psi) across the injector.

EJ

 

On the stock ls1 setup, the injector comp for batt voltage is setup with reference to vacuum as well. So instead of it being a 2 row table with volts and compensation, it becomes a 17 by 28 table. With vacuum the compensation increases (Assuming due to the larger pressure drop across the injector, due to manifold vacuum)

I understand the injector flow per bar, and how to do the conversion for running a 3 bar injector at the 4 bar static ls1 setup, But was just looking for any info on the batt volt compensation in regards to pressure changes.

Ryan

 

ttt. Decided to go with a 4 bar vac/boost referenced setup.

Still looking for information Any help is GREATLY appreciated

Ryan

 

This would be interesting to understand. I expect it's
more like the injector offset table than the flow rate,
it's just about actuation time and really only the
opening edge (off, is off?)