Turbo Lag & superchargers..

[Johnny]

Craig Pugsley wrote:
> 
> Hi,
> 
> > I wonder if you aimed a little compressed air jet at the impeller (so you
> > wouldn't be cooling the turbine side), and just gave a little blast of air
> > when the throttle tipped in.
> 
> I wondered about this too, like have an air tank in the trunk filled by
> a small 12V compressor, and a 1/2 inch air line to the turbo with a
> solenoid valve to dump all the tank into the turbo (like pointing a
> water hose at a bicycle pedal).
> 
> > Even more years ago, there was a deal about variable inlet scrolls.
> > Wouldn't that be something -  variable inlet vanes under electronic
> > DIY_EFI control?
> 
> Err, another innovation from the rotary world- 13B turbos have had 'twin
> scroll' exhaust profiles, selected by a vacuum controlled flap since 1986
> (or was it 1987??)
> 
> Re the electric motor powered supercharger, on RX7 club a 'CVT drive'
> was suggested (ie power the supercharger from the crankshaft). I thought
> you could use a '2-speed drive' similar to the following:
> 
>        A           B            A
>        _____________              |\#/|
>       /  _______/. .\        |\#/|| # |
>      |. O_______. O .|       | # || # |
>      | ...      \.../        | # || # |=== To s/c input
>      |             /         | # || # |
>      |            /          |/#\|| # |
>      |           /             #  |/#\|
>      |          /              #    #
>      |         /             |\#/||\#/|
>      |        /             ]| # || # |
>      |       /              ]| # || # |
>      | ...  /     a/c clutch]| # || # |=== Idler wheel
>      |.   ./                ]| # || # |
>       \___/  C              ]| # || # |
>                              |/#\||/#\|
>                       'overspeed'  'Normal'
>                         pulley      pulley
> 
> The idea is that 'A' has a pawl arrangement for both belts and when the
> a/c magnetic clutch is engaged this 'overspeeds' the normal pulley.
> 
> (However, I can get a complete 13B turbo engine for less than a 2nd hand
> toyota supercharger so I canned this idea).
> 
> Cheers,
> Craig.

That is drawing is really impressive for acsii!
Nice Job!

-j-