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

[arnie]

Agree, Dave.  However, the wording of Jeremy's post stated,
(quote):   If more air flows into the engine, I am still at 12 psi, so the
computer doesn't know about it.

>From that, I trusted the engine was CAPABLE of accepting the additional
air flow.

GAS

----- Original Message -----
From: "Dave Dahlgren" <ddahlgren at snet.net>
To: <diy_efi at diy-efi.org>
Sent: Monday, October 28, 2002 5:28 AM
Subject: Re: [Diy_efi] Re: Question about speed density, etc.


> 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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