OK, I've had a few galsses of wine, and my brain is obsessed with my upcoming Vortech install and I came up with a very weird idea.

One big advantage turbos have over SCs is that they reach full boost much lower in the RPM range. This of course is because exhaust pushes the turbo and the wastegate controls the boost level as opposed to the engine RPM which is controlling the SC boost. With a centrifugal SC like the Vortech, wouldn't it be possible to install a compressor that makes say 14lbs of boost at redline, and a boost controlled bypass valve up stream of the MAF that limits the boost to say 8psi. The larger compressor would reach the 8psi level much lower in the RPM band, and it would act more like a turbo as far as power delivery is concerned. If the bypass valve is before the MAF, then there should be no worries of metering air that is released.

This idea seems too simple for someone like me to have thought of it first, so there must be a flaw somewhere. What is it my little wine stained mind is missing that this won't work?

 

its been done, try searching for it. i cant remember the guys name, he had a G sedan, something like G35spot.

 

Yes that is the guy . I also tried it . It just doesnt work well enough to hassle with IPO

 

ECS does this with C5s for Vortec, Procharger, and Novi by using a restrictor plate. The boost comes on faster and "all at once" compared to one that builds boost as the rpms climb. It still doesn't fully compensate for the high torque results with a turbo.

 

Another thing to consider is that even though you will be reaching desired manifold pressure earlier the SC will continue to reach higher compressor pressures which means higher temperatures. So in reality, without higher boost levels, it is possible that you could get more power down low and possibly lose some up top due to heat depending on your setup.