[Diy_efi] Re: Throttle before turbo on EFI

[Brian Michalk]

> 3. Is the one that is causing me concern, mainly because I just
> don't have the in-depth to work out a few things. Basically
> there would appear to be efficiency gains at medium power levels
> as you can throttle the inlet to keep the turbo in a more
> efficient operating point, with the hope being that gains here
> overcome the losses with the turbo having to deal with a
> restriction. The problem I see is that this often pushes you
> right up to the surge line, which may or may not be acceptable
> at pressures close to atmospheric.
>
> But I keep reading and thinking. One day it will make sense.

Why would one be commanding boost, with a partially opened throttle before
the compressor?  If you want boost, first open the throttle.  More boost?
close the wastegate.

I don't think this is an option for some waste gate controllers.


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