Projection

[Tyson McPherson]

Sorry about the spelling. I was typing and entertaining my one-year old son
at the same time.

Tyson
tyson at ns.net


-----Original Message-----
From: Tyson McPherson <tyson at ns.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Thursday, April 02, 1998 8:48 PM
Subject: Re: Projection


>Hello all,
>
>Yes, you can use the D or DI systems without the O2 sensor. Unpluging the
O2
>simply puts the system in open loop mode.
>
>Also, I will state again: the 502-20 digital two barrel system is idenitcal
>to the orginal 2bbl Pro-Jection system, with the exception that it is now
>digital and not analog. All adjustments are still made the same way, and it
>does not use a Map sensor or IAC.
>
>I have been on this list since last December. Most of what takes place here
>is above my level of knowledge, but I do find it very interesting. I
>subscribed to this list to learn more about EFI, and what is being done by
>people like yourself. I am an outside sale person for Holley Performance
>Products (northern California), and this has kept my experice limited to
>Pro-Jection only. If there is anything I can to help just let me know.
>
>Tyson
>tyson at ns.net
>www.holley.com
>
>
>-----Original Message-----
>From: Mike Jones <rmjones at cyberhighway.net>
>To: 'diy_efi at efi332.eng.ohio-state.edu' <diy_efi at efi332.eng.ohio-state.edu>
>Date: Thursday, April 02, 1998 8:26 AM
>Subject: RE: Projection
>
>
>>Andy,
>>
>>Can the 4Di be used without the O2 sensor?  (I realize tuning becomes more
>>critical.)  Due to water-cooled exhaust system my marine application makes
>>implementation of an O2 sensor difficult.  (One possibility I thought of
is
>>to tap into the currently blanked-off EGR port and run a seperate mini
>>exhaust, but this raises questions of its own, such as how much flow would
>>be required to give accurate feedback, where to discharge this exhaust,
>>etc.  So for now no O2 sensor is my goal.)
>>
>>Holley is advertising a marine 4Di which should go on sale in a couple of
>>months.  I've spoke with Holley tech twice.  One rep said that the marine
>>4Di must use the O2 sensor and the other one said that it wasn't
necessary.
>> Sadly typical for Holley.
>>
>>Thanks,
>>
>>Mike Jones
>>
>>>>Squash  wrote:
>>
>>I have 2 4Di manuals.  One is not released yet (i feel so special...).
>>If you would like a copy of that an the software, gimme a jingle.  The
>>4Di uses a heated O2 sensor, by the way.  I drive mine to work and all
>>over the place all the time, so i know it works!
>>
>>Andy Quaas>>
>>
>>
>>
>