Then I would have to under drive it. Would that not make the bottom end lazy with low compression?
My understanding is that the engine will not see much boost until WOT.
I was thinking that the smaller blower would spin just fast enough to seal the rotors at lower speed,
and be right on the edge at the 6000 mark...which we have to keep in mind...the engine will rarely see
the top side of 4000 with her driving.
I have learned from my truck engine ..That by installing a larger or smaller pully on the crank will
help dictate how fast the boost will come on .
By installing a 7" lower pulley on my truck engine...I gained a tremendous amount more torque lower in the RPM range because the crank was spinning up the blower faster at low RPM.
A smaller lower pulley would spin the blower
slower and not build boost until higher up in the RPM range. So that would help with a daily driver, and also cruising at highway speeds.
I want to make it so she can use 91 octane for daily driving...and install a different tune and e85 fuel
for some deliberate saturday night fun.... if they still do that anymore.
Yes.. I do plan on using another EFI system for fuel delivery.
I also think it would be better for her having the blower not sit so high out of the hood.
I agree that the bigger displacement engine would dictate a larger blower...but it ain't being built to race.
This is a "cool grandma car" if you will.
Edit: I do realize that a smaller blower will heat up faster at top end.
But I have to keep focused on the cars application.