Turbo speed sensor

[Nic van der Walt]

>
> >I agree that measuring the turbo speed and backpressure is best ,if you 
> >know the speed and accleration of the turbo you know where its heading 
> >in advance.
>
> I really would like to do a turbo speed sensor - so far no reply from
> the emails I've sent out to distributors - not even a "we don't do it" :(


What could work for a turbo speed sensor is strapping a microphone to it
and listening to the frequency it screams at. A wideband knock sensor would 
work well. On my bike I can clearly hear the turbo sweeping through the 
frequencies as it speeds up.

N.
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