Originally Posted by tegbooster
i would imagine that if you were to run the charge piping from the turbo into a cold air intake that runs to the supercharger... but then again.... if the turbo is limited to boost... it is stuck there.... doesn't make sense... how can u run 5lbs on an s/c and then go 18 with the turbo.... how does 18lbs get past the supercharger w/o breaking it....
:dunno: just confused i guess
edit: by the time i posted dave answered it... at least for that car... none of these guys talked about some sort of clutch system ?
From what I've read, the Delta S4 used an electromagnetic clutch at the hub of the supercharger drive pulley. When the magnet was energized, a locking mechanism keyed into the face of the pulley and locked to the hub on the supercharger driveshaft.
I should also point out that the intake charge was drawn through the turbo first, then the supercharger. And when the supercharger disengaged, the bypass tubing lead through an air-to air intercooler.
Give me a minute, let me see what pics I can find. This car was an incredible accomplishment in its day.
UPDATE: The car was mid-engined, all-wheel drive. The rear half of the hatchback body was designed to lift off to reveal the entire motor, transmission and rear differential. Granted, things were a bit crowded back there..
This is looking down on the rear end, with the firewall at the top of the picture frame.. If you see the two enormous blue-and-red AN coupling, look down and to the left. that's the top of the 1.7 motor. It took a titanic amount of hardware, but the car was recorded by the FIA as producing 510 hp and "over 500 lb-ft of torque".
And below the left-hand intercooler core, you can clearly see the turbocharger.
If this doesn't convince you to drop the idea of twin-charging a DC*, nothing will.
