[Diy_efi] Re: Throttle before turbo on EFI

[bill.shurvinton at nokia.com]

You will always get cases where you don't 'need' boost, but the turbine =
has spooled anyway so in a blow through you may have 10PSI before the =
throttle and less than atmo after it. In this case you are adding heat =
unecessarily to the incoming air.=20

It's the sort of area where the VATN approach makes a lot of sense, but =
the compressor maps for those never seem to have quite the efficiency =
that a good 'regular' turbo has.=20

> -----Original Message-----
> From: ext Brian Michalk [mailto:michalk at awpi.com]
<snip>=20
> Why would one be commanding boost, with a partially opened=20
> throttle before
> the compressor?  If you want boost, first open the throttle. =20
> More boost?
> close the wastegate.
>=20
> I don't think this is an option for some waste gate controllers.
>=20

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