[Diy_efi] New to list, have a question about speed density and turbos

[Eric D Byrd]

Looking for a site that will give a general overview of ECU theory for
Hondas...I don't mean identification of EcU's, I mean operational theory.
 My 90 CRX Si is OBD0, and I still don't know all the features of the
ECU, or even how it works.  Things keep popping up that I hadn't yet
heard, like dual rev limiters for shifting or drag racing, throttle
tip-in, fuel trim tables (unconfirmed).  I think my final goal is to set
up boost fuel control with a wideband O2 and a feedback circuit.  I.e.,
the equivalent of a second "closed loop" in boost.  O2 never lies:  it
tells you if the juice matches the boost.  And again, a knock sensor that
automatically retards.  The problem would be getting these new functions
to work with the stock Ecu.  I am hesitant to get rid of it, because of
all the neat stuff it can do.

On Mon, 28 Oct 2002 09:47:48 -0600 "Eck, Joel (Houston)"
<Joel.Eck at hp.com> writes:
> yeah, the honda MAP doesn't deliver 5v on the signal line until 
> around 10 psig. the honda ECU freaks out at anything over 3V, which 
> puts it just over 1 psig...
> 
> -----Original Message-----
> From: Eric D Byrd [mailto:klox at juno.com]
> Sent: Friday, October 25, 2002 5:20 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] New to list, have a question about speed 
> density
> and turbos
> 
> 
> Something to add... I hear the '90 Honda MAP sensor can still send
> signals at about 10 psi boost or less.
> 
> Eric
> 
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