DIY_EFI Digest Wednesday, March 22 2000 Volume 05 : Number 117 In this issue: RE: Webber Alpha Re: O2 sensor question Re: O2 sensor question Re: O2 sensor question See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Wed, 22 Mar 2000 11:30:40 -0000 From: "Rich M" Subject: RE: Webber Alpha Ade, Based on Weber-Marelli ecu as used on early Sierra Cosworth and Lancia Integrale amongst others. Uses their own throttle bodies (very nice) - single barrel, dual barrel DCOE mounting pattern, and I think a 3-barrel for Porsche applications. Injectors mount in the throttle body or in an adaptor elbow, depending on application. The big downer with this system was programming - you have to go to an approved dealer for setting up, software and programming tool is not supplied to end users. this may have changed now, but that was the way it used to be. Weber have a pretty comprehensive website - www.webcon.co.uk which has all the details of Alpha you will need. Rich. > -----Original Message----- > From: owner-diy_efi@xxx.org]On > Behalf Of Ade + Lamb Chop > Sent: 21 March 2000 19:55 > To: diy_efi@xxx.org > Subject: Webber Alpha > > > Hi All, > > Does anybody know anything about the Webber Alpha engine managment system? > What does it consist of? > > Ade > > ------------------------------------------------------------------ > ---------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without > the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 22 Mar 2000 05:44:43 -0600 From: "Dave & Irina Eicher" Subject: Re: O2 sensor question Thanks Grumpy, That helps a lot, didn't realize how worthless the narrowband sensor are. There would be no point in trying to build an A/F meter using something like that. Does anyone have any idea where a good wideband sensor can be purchased at the lowest price? thanks, dave - ----- Original Message ----- From: nacelp To: Sent: Tuesday, March 21, 2000 8:47 PM Subject: Re: O2 sensor question > All, the gm O2 sensors that I know of are "switching" ones, meaning they > have a very high slew rate. They are basically meant to read less than, or > greater than .440 volts, depending if rich or lean. Tring to interpolate, > them, to do more is not very accurate. They degrade with age, and are > temperature sensitive. Only a true Wide Band O2 sensor is meant to read > other then as a switch much lower slew rate. There is a ton of info about > them in the archives. Some testing I did here at home suggests to me they > aren't even truely O2 sensors. > Grumpy > > > > Hello, > > > > What is a switching O2 sensor? Never knew there was such a thing. I'm > > interested because I'd like to build a simple A/F meter myself. > > > > thanks, > > > > dave > > > > ----- Original Message ----- > > From: nacelp > > To: > > Sent: Tuesday, March 21, 2000 4:04 PM > > Subject: Re: O2 sensor question > > > > > > > Are you sure you need to add one?. > > > You do realize using a switching O2 sensor isn't the most accurate way > to > > do > > > things. They degrade with age, and output varies with EGT. > > > Bruce > > > > > > > > > > I am dropping a new motor in my '91 240SX this weekend and I am > looking > > to > > > > install a second O2 sensor to drive my A/F meter. > > > > > > > > Can some one tell me the pin out for a 3-wire Bosch sensor? > > > > > > > > Thanks! > > > > > > > > Scott Bowen > > > > Bastard Motorsports Engineering > > > > Houston, TX > > > > > > > > > > > -------------------------------------------------------------------------- > > > -- > > > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the > > > quotes) > > > > in the body of a message (not the subject) to > > majordomo@xxx.org > > > > > > > > > > > -------------------------------------------------------------------------- > > -- > > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the > > quotes) > > > in the body of a message (not the subject) to > majordomo@xxx.org > > > > > > > > > > -------------------------------------------------------------------------- > -- > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the > quotes) > > in the body of a message (not the subject) to majordomo@xxx.org > > > > -------------------------------------------------------------------------- - -- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 22 Mar 2000 05:57:20 -0600 From: "Dave & Irina Eicher" Subject: Re: O2 sensor question Haven't investigated sensors yet, I was hoping to find one that came with a spec so I could see what the output curve is, then read with an ADC and micro, display on a little LCD. Do you know of a low cost source for these wideband sensors? dave - ----- Original Message ----- From: nacelp To: Sent: Tuesday, March 21, 2000 8:48 PM Subject: Re: O2 sensor question > > Which sensor? > Grumpy > > > I'm planning to do the same thing to get a A/F meter. But I was planning > on > > using a wide band sensor to get a precise reading of mixture. Is this > > overkill? > > > > thanks, > > > > dave > > > > ----- Original Message ----- > > From: BOWEN, SCOTT M. (JSC-CC) > > To: > > Sent: Tuesday, March 21, 2000 4:35 PM > > Subject: RE: O2 sensor question > > > > > > > Bruce, > > > I talked to Jim Wolf and they said that just "Y"-ing the signal from the > > O2 > > > sensor can cause the ECU to make the car run Richer. > > > I have an extra port in the exhaust Manifold for the "Air Induction > Valve" > > > on the '91 Manifold, but the AIV is coming out and the port for it > > > is...14MM, just right for an O2 sensor. I am leaving the one wire unit > > for > > > the ECU and installing a 3-wire in the new hole for my A/F Meter. > > > > > > That was the plan anyway...I have a new 3-wire unit for some where and > > > wanted to put it to use... > > > > > > Scott Bowen > > > Bastard Motorsports Engineering > > > Houston, TX > > > 281-244-9669 > > > > > > -----Original Message----- > > > From: nacelp [mailto:nacelp@xxx.net] > > > Sent: Tuesday, March 21, 2000 4:04 PM > > > To: diy_efi@xxx.org > > > Subject: Re: O2 sensor question > > > > > > Are you sure you need to add one?. > > > You do realize using a switching O2 sensor isn't the most accurate way > to > > do > > > things. They degrade with age, and output varies with EGT. > > > Bruce > > > > > > > > > > I am dropping a new motor in my '91 240SX this weekend and I am > looking > > to > > > > install a second O2 sensor to drive my A/F meter. > > > > > > > > Can some one tell me the pin out for a 3-wire Bosch sensor? > > > > > > > > Thanks! > > > > > > > > Scott Bowen > > > > Bastard Motorsports Engineering > > > > Houston, TX > > > > > > > > ----- End of forwarded message from owner-diy_efi@xxx.org ----- > -------------------------------------------------------------------------- - -- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Wed, 22 Mar 2000 20:31:45 From: "Mike (Perth, Western Australia)" Subject: Re: O2 sensor question At 05:44 AM 22/3/2000 -0600, you wrote: >Thanks Grumpy, > >That helps a lot, didn't realize how worthless the narrowband sensor are. >There would be no point in trying to build an A/F meter using something like >that. Does anyone have any idea where a good wideband sensor can be >purchased at the lowest price? Yeah - I'd like to know too, someone once mentioned this 'EGOR' sensor on honda ? Anyone know models/years etc ? Rgds ~`:o) Mike Massen Trading as "Network Power Systems" and "Network Computers" Perth, Western Australia Ph +61 8 9444 8961 Fx +618 9264 8229 (fax -> email) Products/Personal/Client web area at http://www.wantree.com.au/~erazmus (Current pics - trip to Malaysia to install equipment in jungle power site) Some say there is no magic but, all things begin with thought then it becomes academic, then some poor slob works out a practical way to implement all that theory, this is called Engineering - for most people another form of magic. - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ End of DIY_EFI Digest V5 #117 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. 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