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

[William Shurvinton]

TPS and 02 is a perfectly acceptable way of tuning a performance motor. Here
in UK it is standard fare with MBE setups.

The stabilisation time of a 4 gas has very little relation to what the
measurement speed is with a WB-02. As already stated you can get around 10
meaningful samples per second out of a WB system.

You also have to look at how learning ECUs work.

Bill

----- Original Message -----
From: "Adam Wade" <espresso_doppio at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Friday, November 01, 2002 8:00 PM
Subject: Re: [Diy_efi] New to list, have a question about speed density and
turbos


> --- Eric D Byrd <klox at juno.com> wrote:
>
> > if the mix went a little leaner in the 3 or 4 revs
> > it took for the system to restore the mix to 12:1
> > during transient conditions,
>
> If it responded that quickly, cars would have a TPS
> and an O2 sensor, maybe a coolant temp sensor, and
> nothing else.
>
> Think about how long it takes for exhaust gases in a
> steady-state condition to stabilize with any sort of
> gas meter.  Usually it takes about 5 seconds or so for
> a four-gas analyzer; for an O2 sensor it might be 2
> seconds or so


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