[QUOTE=amiddlecott;1045469]Hi I feel like we are going round and round in circles and I'm just not getting it..
The SC must be wound really quickly by the engine, hence different size pulley's. The smaller the pulley the faster the SC, the faster the SC the more air it needs, hence larger MAFS 85-90mm. The more air the SC takes the more fuel required to give the correct fuel to air ratio, hence higher PSI fuel pumps.
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Fuel pump pressure relates to base pressure - mine is set at 55PSI - idling, with no sensor capillary attached to the regulator.
If the ECU determines you need more fuel, it holds the injectors open longer.
the only way fuel pressure alters - is by mechanical control - ( the capillary hose on the reg, 1 PSI boost equals 1 PSI increase in fuel pressure. 20 PSI boost equals 20 PSI increase in fuel pressure -- vacuum same but opposite -- 1 inch mercury equals 1PSI decrease in fuel pressure.
ECU controls length of time injectors remain open.
superchargers have limitations - turning them faster, is not always productive - they come to a point of cavitation - like a boat propeller - Eaton m112 is a great example, - change the pulleys and increase lower and mid power, but actually lose power at top end. Isn't that why we are fitting KenneBells? - Personally I am more interested in torque figures -
Cheers

 

I've posted some Dyno graphs on this thread, which were taken after the TS was installed..

https://www.jaguarforums.com/forum/j...6/#post1307133