Thread: volumetric efficiency of N/A, SC, TC, and twincharged L67

Originally Posted by Turbocharged400sbc

a twin charged car is a crutch for too large of a turbo that spools slowly due to lack of exhaust volume. the SC helps grunt up the bottom end but then becomes a drag up top as it falls off in pumping efficiency as the turbo reaches its.

not a problem nowadays with VNT turbines allowing for the best of both worlds with a turdbo.

that's what I was trying to say last night, but I couldn't see past the red, and all that really came out was that the supercharger helps with low and mid power, but when the turbo starts taking over, the supercharger gets in the way. I suggested a clutch should be used to disengage the supercharger when the turbo took over, but the cost of a clutch is going to be excessive.

Originally Posted by coolone

I've seen that in a movie once (mad max), lol...

but really, I'm not aware of a clutch driver pulley system being installed on a SC functionally, correct me if I'm wrong! But I don't think there would be a clutch that small that could handle the load, or a rotor shaft that could handle the strain. The clutch even if it would grab, wouldn't last too long, let alone with smaller pulleys where RPM's are crazy, heat is crazier. That's why there's the bypass valve... Just my $.02 lol

If I remember correctly, Mercedes-Benz had a twin charged 4 cylinder that used an electric clutch