Supercharge Or Turbo?

rumblefish360 said

dgc, wouldn't lag be a non-issue if the boost was allready there and bledd off via the waste gate until a wack of the throttle.

(OK, I think that question might have just proven my earlier point. I don't know jack about turbo's. But I'd like to meet Jack.)

Torque on demand was my favorite saying for the motion to get a super charger. No waiting.

Click to expand...

Agreed somewhat. The waste gate keeps boost at a certain level to alleviate over boost/engine damage. The wastegate can be controlled a few different ways. 1) Springs in the waste gate by themselves 2) Springs & manual boost controller 3) Springs & Electronic Boost Controller

The Blow off Valve will relieve the pressure built up in the intake tract when the throttle is let to close. Pressure is relieved allowing the Turbo to still be spinning high on the RPM and relieve pressure to not screw up the turbo and then like you are saying with a Quick Wack on the throttle and the Blow off valve closing, boost should be almost instant at that point...... The wastegate may open a bit right off the bat when the throttle is let to close but the Blow off Valve should open up and take over relieving the boost enough so the wastegate stays closed allowing for a quick spool up when the throttle is smashed again and the blow off valve closes.

This conversation here is regarding a car of any kind already on boost and then letting off the throttle then back on boost.

Getting a turbo initially to spin up enough to create boost is a whole different animal.