Here's another idea. You could get this voltage from an alternator
on your vehicle. Add a second one, pull out the regulator and
rewind it for the voltage you want. Or with a bit more ingenuity do
some other tricky thing like modifiy your existing altenator to have
a regular and high voltage mode. Switch modes for the 10 seconds
you mentioned and direct the high voltage to your blower. The
typical maximum power output of an alternator is similar to that of
your blower.

FWIW figures I remember suggest the turbo requires something
like 7hp on a 1600cc engine with around 8psi boost (these figures
are very rusty so don't quote me). One horse power is about 746W.

For 10 seconds of boost it might be more efficient to use 3W of
power to open a solenoid valve on a nitrous oxide canister in your
intake manifold...

Brent Brown
Electronic Design Solutions
16 English Street
Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile: 025 334 069
eMail:  brent.brown@clear.net.nz