you can buy an electronic supercharger but it will soon restrict airflow one the intake side.  to be honest though, you either have no lag on the bottom and zero power up top due to the turbo running out of puff, or you run a big turbo that will do the opposite.  you can counter the effects of turbo lag by running a higher compression ratio but then you run into the problem of preignition due to the raised compression ratio.  turbo technology has gotten better with the use of VGT but then the price is a bit higher.  you just need to prioritize your use of the car and match the turbo that you want.  

this is y they started doing twin turbos st allow the engine to spool the turbos very fast but u generally need more than a 4cyl like a V6 ,I6, or a V8  

I have designed and am waiting on the patent to come through on an Anti-Lag Turbo Device. Basically it is a high RPM High Tourque electric motor with a capacitor and variable speed control mounted to the intake side of turbo (Keeps it cooler). The motor will kick on based of a change in the TPS (Throttle Position Sensor) and adjust and maintain RPM that is consistent to produce what the turbo would normally spin at. The benefit is that once the turbo is spinning it will require very little voltage to maintain RPM. Another benefit is that when down spooling, the electric motor would backfeed and charge the capacitor. The Capacitor provides the initial high power required to spool up and since it spools with the change in throttle position it can be developed so that a less radical change in the TPS would actually spool the turbo up less than if you floored it. Not an engineer, just like solving the problems that p*ss me off and turbo lag has been one of them. With any luck Subaru will cut me a sweet deal in buying the patent.  

Also, the shorter the distance from your exhaust manifold to the turbine, the faster it will get pressure behind the turbine. I figured everyone aleady knew that though.  

AWESOME........ seriously.....JUST AWESOME........Better than my fan-clutch or flywheel  idea    

roadtrip.. you say you would mount the motor/capacitor package before the turbo inlet and have the motor keep the compressor wheel spooled for optimum response. How does the motor actually connect to the compressor blades?

wouldnt it be funny if it was some pathetic SCC editor replying to this. And why do I see it coming?  

I'm just thinking out loud here,
but what if there was an electric assist just to give the turbine an innitial boost so that the exhaust flow could easily take over and get the turbine up to a more productive speed????
I dunno much about turbo's. I've owned a 1980 Ford Fairmont station wagon, and an 89 Tempo  

Here's my most stupidiest? (is that a word???)  I dea yet!  How 'bout the shape of the fins? Make them of a lighter or more elastic material the reasonings goes as follows...


We all know when you spin an object it wants to go outward...-duh- but knowing this we know it carries momentum. The fins would form a dome shaped design as they spin at top rpm on the turbo... Think of it as spining a coin really fast, as its being spun it would form an eliptical shape and return to a round shape as it slows down. If we were to make the elipes wider on our theoretical coin  it would spin longer (according to me...) Getting back to the turbo fins. If they form a dome shape as they try to spin outwards it would take more time for them to reach back inwards and lose momentum meaning less pressure drop between shifts or braking points in turns... Oh my god I think I just invented Variable Vane Turbos....  

AH *** here I thought I was in a roll....


Or is it different?... screw it I'm tired...  

I know this doesn't really help you guys find a lag-free turbo charger but heres an idea:

Turbo-Lag is gods way of giving V-8 a chance!
 

A compressor on the intake to supply extra air...so  you want a supercharger.  Well, the electric compressor idea isn't bad, but I think I read that it is in development already by one of the car companies.  They see it as a part of a hybrid drivetrain.  The problem with that is that in order to be small enough to be worth it, it would take too long to store enough pressure to be worth it on a 12 volt system.  How about storing the pressure released from the blowoff valve?  

You mean "proverbial question"?

Anyway, Lag is the nature of turbos; you will always have some lag since you are using exhaust pressure to spool the compressor.  Bigger turbos and smaller engines make greater lag.  An electrically-assisted turbo is a cool concept but I've never seen one available to the general public.  If it is that important to you to be "lag free", then use a supercharger.  

If you need turbo power with the low-rpm availability of the supercharger and you've got either a lot of cash or a lot of skillz, then go ahead and twin-charge your motor like they did in production with the 1985 Lancia Delta S4 Stradale or, more recently, in VW's twincharged 1.6 engine concept for the Golf.  

In the aftermarket, Forced Air Technologies made an STi (twin GT30R turbo plus AMG supercharger), which is a prime example of creative (albeit expensive) engineering for lag reduction.

As another example, Alta also makes a turbo kit that supplements the Supercharger on the Mini Cooper S, thus making it a twincharged engine.