Do you know when your supercharger runs?...ALWAYS
As I go further into the cooling mods of my srt, the more I find out. I wanted to pass the following info on so that there will be less confusion about the operation of our car's Supercharger (s/c) .
Many speak about the s/c cutting in below 3000 revs etc, well yes, if starts almost immediately. The intercooler circulation pump runs constantly upon start up and the reason is the supercharger is engaged as soon as you start to drive, FOR REAL.
Let me try to describe it this way, the supercharger does not run when the car comes to a stop, wheels not moving.
When you start the car, the supercharger will not run if you rev the motor in neutral. When you go in gear ( wit a buddy driving ), you will see that if you torque up the transmission using both feet, as you goose the throttle the s/c will kick in, and when you let off the gas it will back kick out.
In gear, driving very easy the supercharger will not kick in until about 1500 revs, then its on for the trip. Coasting for about 20 seconds does not kick the s/c out from my indicators, only when you roll to a stop.
This should get some scratching their heads, and I hope that I have gotten useful information to the forum. As this first came to light, I was taken back a bit myself but it makes sense. You dont wanna kick the throttle, have the transmission downshift, the engine rev up and then apply the clutch of the supercharger.
City diesel busses have their superchargers operate full time. [ BTW: Thats where hot rodders first got their supply of blowers for the hot rods. ]
To prove this, I added a LED across to the supercharger and another across the I/C pump some time ago, watching their operation during drives and traffic.
Enjoy; Woody