[Diy_efi] Re: Question about speed density, etc.

[Dave Dahlgren]

Where are you measuring the boost pressure before or after the blade? If before
it is an interesting number but meaningless if after the blade it is the
manifold pressure. Many throttle bodies have a blade size that is larger than
the engine actually needs to produce full power especially at lower rpm.. So yes
you can reach full power at less than full throttle opening as the engine can
not pump the full cfm rating of the throttle body.
Dave

Startled Jackrabbit wrote:
> 
> I think there may be a little confusion over what I
> meant in my first post.
> 
> My problem is not that the sensor would be past its
> limits.  What I am worried about is once my intake
> reaches the maximum pressure allowed by the wastegate
> (which is currently set at 12 psi, no spikes, rock
> solid, nearly independent of weather) and I am not at
> full throttle and then I go to WOT.  If more air flows
> into the engine, I am still at 12 psi, so the computer
> doesn't know about it.  If it increased to 15 psi, the
> computer would be able to read that, but the fact is
> it cannot go over 12.
> 
>
> 
> Over and out,
> JeremyB.
> 
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