Could a supercharger reduce turbo lag

[Z1mb0b]

Hello,
If you were to have a supercharger and instead of connecting the boost to the engine could you connect it to a turbo to blow in air and spool up the turkey o quicker to reduce lag?

[Jimmy Recard]

Isn’t this partly what is done with electric compressors already?

ETA: motors or compressors

Edited by Jimmy Recard on Sunday 31st March 17:06

[98elise]

Combined supercharger and turbo sets ups have been around for a while.

Edited to add...
Just reading it again are you suggesting using a supercharger to spin the exhaust side? If so what would that achieve? It sounds very inefficient.

Why not just compound charge.

Edited by 98elise on Sunday 31st March 17:08

[Tony1963]

Pretty pointless pursuit these days. Back in the mid 80s with the Group B rally cars, those that were turbocharged suffered lag, but the Lancia Delta S4 had a supercharger to counter this. However, the planned Group S replacement didn’t have a supercharger. The tech had already moved on. And here we are, over thirty years later, and true turbo lag is almost non-existent.

[anonymous-user]

Volvo have a boost enhancement system that stores a volume of compressed air and uses that short burst of air from that storage tank to reduce turbo lag by blowing the compressor around with the air:

Volvo_PowerPulse

[RegMolehusband]

Ah well, what you need is a helicopter starter turbine to keep the turbocharger spinning.

https://youtu.be/11687nVdzdk

[finlo]

Haven't VGT,s alleviated this problem year's ago?

[GreenV8S]

Koenigseggg claim that their new model uses a tank of compressed air to overcome turbo lag. I still half suspect they're joking. Hyperbar engines take it one step further and run the turbo in a closed loop as a gas generator with a high bypass ratio so that there is full boost all the time. I think the French used this in one of their tanks, and I remember seeing pictures of a hillclimb special that used one too.