|
Re: dumb question
paxton/vortec type SC's (turbo-like compressor wheel) are very linear just like your previous assumptions, don't peak until redline. Roots (twin screw, etc) are close to flat-line from near idle up (aka, 10psi at 2000 RPM's, 12psi at redline). Thats because twin screw is a true positive displacement pump, where as the paxton isn't. True positive displacement pumps, since they are turning the same speed as the engine, will make similar boost regardless to the RPM
Most SC cars have bypass valves for partial throttle operation
booster brakes work the same way on NA cars. its assumed that you'll be decelerating soon after applying the brakes, which gives you a vacuum supply. There is enough vacuum stored in the booster for braking while on boost/WOT, but after that, if you don't let off the gas, you will lose the booster, regardless to the engine having forced induction
You can see this by pumping the brakes while holding the gas WOT on any car. You will lose the booster until you let off the gas.
__________________
life begins at 10psi of boost
Three turbo'd motorcycles and counting.
|