DIY_EFI Digest Wednesday, March 22 2000 Volume 05 : Number 116 In this issue: Re: Circuit simulation RE: Nissan JECS ECU RE: I another new guy..... more circuit sims..this ones free RE: Nissan JECS ECU RE: I another new guy..... BasicX Microcontroller Re: Nissan JECS ECU RE: I another new guy..... O2 sensor question Re: O2 sensor question Re: BasicX Microcontroller Help with a Ford Granada not running right. NC: Is anyone on the third-gen f-body list? Re: BasicX Microcontroller Re: O2 sensor question Land shark? RE: O2 sensor question Re: O2 sensor question Re: O2 sensor question Re: O2 sensor question Re: O2 sensor question Re: DIY_EFI Digest V5 #112 Re: Chamber Isolation Webber Alpha 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: Mon, 20 Mar 2000 22:08:33 +0100 From: "Fery Janssen" Subject: Re: Circuit simulation Hi there, Although I'm not enlisted to the EFI Website for additional info I'm gathering on Injection systems for my Yamaha Motorcycle, now and then I try to help someone out. I saw your problem question on the net and I might have an answer to it. First question to you is: Are you using C-mos or TTL. In the first case you can solve your problem with the following IC's: the 4532 for priority of your audio signal that you want to select first and the 4052 for channeling up to four two-channel inputs to one audio amplifier. In comination with a 40106 (six-schmitt trigger invertors) for audio detection you can solve your problem. The second solution: There is no second in case of TTL IC's. as certain components aren't available in TTL. Hope you have enough info to complete your schematic. If there is any problem. Ring a bell, if I have any time left I can deliver you the schematic. It might take an hour or two and loads of weak tea but this problem should be not that difficult to solve I guess... Sincerely, Ferry - ---------------------------------------------------------------------------- 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: Tue, 21 Mar 2000 09:12:34 -0600 From: "BOWEN, SCOTT M. (JSC-CC)" Subject: RE: Nissan JECS ECU RE: I another new guy..... Yup, that is my problem, no removable EPROM... But Jim Wolf adds an EPROM/Daughter Board via the 40 pin port that is on the board in the ECU[#A12-001 B57]... I am trying to figure out how to do this..... Or find the equivalent chips that Nissan/JECS uses and replace them with something I can FLASH. Scott Bowen Bastard Motorsports Engineering Houston, TX 281-244-9669 - -----Original Message----- From: Ludis Langens [mailto:ludis@xxx.com] Sent: Monday, March 20, 2000 11:27 PM To: diy_efi@xxx.org Subject: Re: Nissan JECS ECU RE: I another new guy..... "BOWEN, SCOTT M. (JSC-CC)" wrote: > > My Nissan/JECS setup is out of a 1991 240SX with the KA24DE engine [2.4l > DOHC] and I have found out a few things. > > It has one 84 pin processor... A neighbor and I popped open the ECU of an '85 or so 300ZX engine. It used a Motorola 6802 along with several other 40 pin DIPs. It appeared to have a mask ROM or an OTP PROM. There was no unplugable EPROM. - -- Ludis Langens ludis (at) cruzers (dot) com Mac, Fiero, & engine controller goodies: http://www.cruzers.com/~ludis/ - ---------------------------------------------------------------------------- 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: Tue, 21 Mar 2000 11:53:54 -0500 From: mswayze@xxx.com (Mike Swayze) Subject: more circuit sims..this ones free This is a multi-part message in MIME format. - ------=_NextPart_000_00BE_01BF932C.21CD25C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable http://www.softronix.com/logicex.html another logic simulator for circuit design. Swayze mswayze@xxx.com kswayze@xxx.net - ------=_NextPart_000_00BE_01BF932C.21CD25C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
http://www.softronix.com/l= ogicex.html
 
another logic simulator for circuit=20 design.
Swayze

 - ------=_NextPart_000_00BE_01BF932C.21CD25C0-- - ---------------------------------------------------------------------------- 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: Tue, 21 Mar 2000 11:57:03 -0600 From: "BOWEN, SCOTT M. (JSC-CC)" Subject: RE: Nissan JECS ECU RE: I another new guy..... Thanks Mike... The ST7250 look like the one I need, but it only has 64 pins...mine is a 68 pin.... Scott Bowen Bastard Motorsports Engineering Houston, TX 281-244-9669 - -----Original Message----- From: Swayze [mailto:kswayze@xxx.net] Sent: Monday, March 20, 2000 4:42 PM To: diy_efi@xxx.org Subject: Re: Nissan JECS ECU RE: I another new guy..... had a little free time ,part# search at ST Micro on one of the chips mentioned yielded an MCU ST7250. don't know if its relevant or not. I can send you the .pdf if you want it. the other numbers only gave serial transmisiion/encoder stuff with partial relevance. Dogpile kept throwing up virtual interface architecture on any of the ECCS searches byE Mike Swayze mswayze@xxx.com kswayze@xxx.net - ----- Original Message ----- From: "BOWEN, SCOTT M. (JSC-CC)" To: Sent: Monday, March 20, 2000 4:12 PM Subject: Nissan JECS ECU RE: I another new guy..... > Well... > > My Nissan/JECS setup is out of a 1991 240SX with the KA24DE engine [2.4l > DOHC] and I have found out a few things. > > The ECU, with board #A12-001 B52, has a 40 pin port on the board just right > for a ribbon harness connector... > > It has one 84 pin processor with a JECS part number[M3M7790STJ], but they > don't make it [of course] and they will not tell me who does [Oh, sorry, > Nissan owns that information], a JECS chip is a 68 pin [M6M72561J-I] and a > NEC 44 pin [D65012L(A)904]. > ......... - ---------------------------------------------------------------------------- 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: Tue, 21 Mar 2000 12:08:06 -0600 From: MysticZ Subject: BasicX Microcontroller Does anyone have any experience with the BasicX microcontroller? It looks like the idea came from a Basic Stamp, but the thing seems to be way cooler. 32 I/O lines, extremely fast, ability to add lots and lots of addressable memory, and (maybe best of all) it's cheaper than the stamp. Here's the url: http://www.basicx.com/ I just ordered a Stamp to play with and see what it'll do, but I think I need to order one of these to mess around with. Since it'll do parallel tasks it may be just the thing for my project. If I can fit all the code into 512k they can even burn it onto the chip before shipping. If I read all this right it means the digital instrument panel, fuel injection, and maybe even data logging will be possible with a single chip. - -- Steve 97 Chevy Camaro Z28, Mystic teal, A4, not stock 90 Kawasaki EX500A4, black, M6, not even CLOSE to stock! lt1_z28@xxx.net/~lt1_z28 Aluminum, steel, carbon fiber, titanium, and two cast iron balls. McMillan Motorsports- http://www.mmsbikes.com - ---------------------------------------------------------------------------- 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: Tue, 21 Mar 2000 13:25:26 -0500 From: "Swayze" Subject: Re: Nissan JECS ECU RE: I another new guy..... I did a search there one time on some chrysler chip numbers and came up with an ECM, sorry I couldn't be more help. most of the searches I did on the ISDN at work turned up the virtual interface spec. I did run across a book that had connector pinouts similar to the GM ones though. http://www.aeswave.com/Bookstore/book_ad550.htm kinda expensive though. the rest of it was russian diakom sites byE Mike Swayze mswayze@xxx.com kswayze@xxx.net - ----- Original Message ----- From: "BOWEN, SCOTT M. (JSC-CC)" To: Sent: Tuesday, March 21, 2000 12:57 PM Subject: RE: Nissan JECS ECU RE: I another new guy..... > Thanks Mike... > The ST7250 look like the one I need, but it only has 64 pins...mine is a 68 > pin.... > > Scott Bowen > Bastard Motorsports Engineering > Houston, TX > 281-244-9669 > > -----Original Message----- > From: Swayze [mailto:kswayze@xxx.net] > Sent: Monday, March 20, 2000 4:42 PM > To: diy_efi@xxx.org > Subject: Re: Nissan JECS ECU RE: I another new guy..... > > had a little free time ,part# search at ST Micro on one of the chips > mentioned yielded an MCU ST7250. don't know if its relevant or not. I can > send you the .pdf if you want it. the other numbers only gave serial > transmisiion/encoder stuff with partial relevance. Dogpile kept throwing up > virtual interface architecture on any of the ECCS searches > byE > Mike > Swayze > mswayze@xxx.com > kswayze@xxx.net > ----- Original Message ----- > From: "BOWEN, SCOTT M. (JSC-CC)" > To: > Sent: Monday, March 20, 2000 4:12 PM > Subject: Nissan JECS ECU RE: I another new guy..... > > > > Well... > > > > My Nissan/JECS setup is out of a 1991 240SX with the KA24DE engine [2.4l > > DOHC] and I have found out a few things. > > > > The ECU, with board #A12-001 B52, has a 40 pin port on the board just > right > > for a ribbon harness connector... > > > > It has one 84 pin processor with a JECS part number[M3M7790STJ], but they > > don't make it [of course] and they will not tell me who does [Oh, sorry, > > Nissan owns that information], a JECS chip is a 68 pin [M6M72561J-I] and a > > NEC 44 pin [D65012L(A)904]. > > > ......... > > -------------------------------------------------------------------------- - -- > 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: Tue, 21 Mar 2000 13:13:43 -0600 From: "BOWEN, SCOTT M. (JSC-CC)" Subject: O2 sensor question 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 ------------------------------ Date: Tue, 21 Mar 2000 21:31:03 +0200 From: "John Andrianakis" Subject: Re: O2 sensor question 2 wires of same color- white are for the heating element and third wire- black is the signal. - ----- Original Message ----- From: BOWEN, SCOTT M. (JSC-CC) To: Sent: 21 Μαρτίου 2000 21:13 Subject: O2 sensor question > 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 ------------------------------ Date: Tue, 21 Mar 2000 13:37:00 -0600 (CST) From: Roger Heflin Subject: Re: BasicX Microcontroller On Tue, 21 Mar 2000, MysticZ wrote: > Does anyone have any experience with the BasicX microcontroller? It > looks like the idea came from a Basic Stamp, but the thing seems to be > way cooler. 32 I/O lines, extremely fast, ability to add lots and lots > of addressable memory, and (maybe best of all) it's cheaper than the > stamp. Here's the url: > > http://www.basicx.com/ > > I just ordered a Stamp to play with and see what it'll do, but I think I > need to order one of these to mess around with. Since it'll do parallel > tasks it may be just the thing for my project. If I can fit all the code > into 512k they can even burn it onto the chip before shipping. If I read > all this right it means the digital instrument panel, fuel injection, > and maybe even data logging will be possible with a single chip. That is 512 Bytes, not Kbytes. And probably they won't burn things into the chip for quanity 1, or probably even quanity 100, they will want a big quanity before they go to the trouble of burning it in for your (without charging a large amount to do it per chip). It does look somewhat useful for some tasks. The basicx-1 does not appear to have any A/D convertors, you need the -24 to get that. Roger - ---------------------------------------------------------------------------- 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: Tue, 14 Mar 2000 17:30:04 +0000 From: Ade + Lamb Chop Subject: Help with a Ford Granada not running right. Hi All, First of all to those who are also on the Mini-list I doing a favour for a friend that is all. It is a Bog std Ford Granada with injection. The problem is that the head was changed about 1000miles ago, I think he said is was cracked or something. Since then it hasn't run right. The only symptom I have been told is that it idles at 1500rpm. If it is made to run below this it is crap (I dunno how it is made to run below 1500). My first throught are a vacume leak. I know it is very vague.. but I don't know anything about it... I think I am having a look tomorrow. Any ideas of stuff to check first?? Ford want 50ukp just to open the Bonnet!! Ade - ----- 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 ------------------------------ Date: Sun, 19 Mar 2000 08:30:35 -0500 From: "Steve Cauffiel" Subject: NC: Is anyone on the third-gen f-body list? I'm curious because I haven't received a digest in over ten days and am wondering if it is down, or if I have just been bumped or something. I tried resubbing, unsubbing then resubbing... Nada. The list admins haven't responded either... Steve - ----- 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 ------------------------------ Date: Tue, 21 Mar 2000 15:07:40 -0600 From: MysticZ Subject: Re: BasicX Microcontroller Roger Heflin wrote: > > That is 512 Bytes, not Kbytes. My bad. Read it wrong. > And probably they won't burn things > into the chip for quanity 1, or probably even quanity 100, they will > want a big quanity before they go to the trouble of burning it in for > your (without charging a large amount to do it per chip). >From what I can tell you can actually do it yourself with the board used to program the thing with basic. I've only skimmed through the docs, but it looks like it can program EEPROMs as well as the X-1 itself. Another neat thing is that can copy the code to RAM from the EEPROM and run it waaay faster. It's biggest advantage over the stamp is that it can run multiple subroutines simultaneously. The project I'm working on right now is an ultra light dash for the Ninja. The tach is going to be 5 2" alpha LED arrays controlled by a MAX7219, possibly using SPI to interface it. The speedo will be either 3 1" LEDs or a servo controlled analog (especially attractive with the .1 ounce servos that are floating around). Oil pressure, water temp, and air/fuel will be bar graphs driven by either LM3914s interfaced with freq. to volt. converters or another MAX7219. The fuel injection parts will either be stuck on the same stamp or X-1 or on their own networked to the dash chip. I also want to put the chips on SIMMs so they can be programmed ahead of time and swapped at the track in a few seconds. > It does look somewhat useful for some tasks. The basicx-1 does not > appear to have any A/D convertors, you need the -24 to get that. Or external ADCs. I think I saw some SPI ADCs that would work nicely. I just thought of something. I need a cheap laser printer so I can print the iron on PCB masks. - -- Steve 97 Chevy Camaro Z28, Mystic teal, A4, not stock 90 Kawasaki EX500A4, black, M6, not even CLOSE to stock! lt1_z28@xxx.net/~lt1_z28 Aluminum, steel, carbon fiber, titanium, and two cast iron balls. McMillan Motorsports- http://www.mmsbikes.com - ---------------------------------------------------------------------------- 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: Tue, 21 Mar 2000 17:04:06 -0500 From: "nacelp" 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 ------------------------------ Date: Tue, 21 Mar 2000 22:08:35 -0000 From: "Will Reeve" Subject: Land shark? Hi all, Is the land shark guy still around? His DME editor software looks quite nice, but his web pages are a bit old! Will - ---------------------------------------------------------------------------- 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: Tue, 21 Mar 2000 16:35:23 -0600 From: "BOWEN, SCOTT M. (JSC-CC)" 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 > > -------------------------------------------------------------------------- - -- > 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: Tue, 21 Mar 2000 20:40:43 -0600 From: "Dave & Irina Eicher" Subject: Re: O2 sensor question 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 ------------------------------ Date: Tue, 21 Mar 2000 20:45:06 -0600 From: "Dave & Irina Eicher" Subject: Re: O2 sensor question 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 > > > > -------------------------------------------------------------------------- > -- > > 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: Tue, 21 Mar 2000 21:47:47 -0500 From: "nacelp" 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 ------------------------------ Date: Tue, 21 Mar 2000 21:52:15 -0500 From: "nacelp" Subject: Re: O2 sensor question > 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. Can, covers alot of ground. Maybe reading it with an old analog meter where it loads the sensor yes. But if you using a "meter" like at the gn ttpe list you'd be safe, ie high impedance input. Grumpy > 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 > > > > -------------------------------------------------------------------------- > -- > > 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 11:53:25 From: "Mike (Perth, Western Australia)" Subject: Re: DIY_EFI Digest V5 #112 At 01:42 AM 21/3/2000 -0500, "Swayze" wrote: >got a chance to look at the book, seems this % alcohol sensor sends temperature and density signals to the ECM. works for ethanol and methanol. the way its drawn in the manual looks like a capacitor. has a paragraph on using a 'Tech 1 scan tool to determine percent methanol in the fuel,but really just mix with known volume of water as water an alcohol are mixable. 'M85' fuel--85%methanol,15%unleaded. a few paragraphs in there on formaldehyde as a byproduct. offhand anybody know the relative densities of unleaded,methanol and ethanol (vs. water). Interesting, :) And yes Formaldehyde is produced if too rich and/or cat not getting enough spare o2 etc. >another question-- is methanol(ethanol) a significant knock deterrent? Its around 100 octane - as is alcohol, though the alcohol would be better, in that it has a little more energy per ml then methanol and er um one could use it biologically if you get stuck in a remote location ;-) Methane is around 120-130 octane - even better but you need heaps as its a gas and displaces the air... Methanol though is cheaper then alcohol but is poisonous, seeps through skin very easily into blood :( Though octane numbers over 100 are a little meaningless IIRC - comments ? Rgds :) mike - ---------------------------------------------------------------------------- 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 07:10:24 -0000 From: "gazza836" Subject: Re: Chamber Isolation would this not upset the thrust side of the piston (enhanced piston slap)? - ----- Original Message ----- From: Roy To: Sent: Tuesday, March 21, 2000 9:20 AM Subject: Re: Chamber Isolation > Hi all > > In reply to Mikes message: > > The best solution to "aerodynamics in the crankcase" > is > best achieved when the engine runs a dry sump > lubrication system for the following reasons. > > 1) The crankshaft is not rotating in an oil bath which > waste power. > > 2) By using a 3 stage pump with a single pressure > stage and two scavenge pumps, with a sealed > crankcase, you can run a partial vacuum in the > crankcase, just make sure that the oil tank has > plenty of ventilation. > > Roy Spectric's Ltd > > > > Date: Thu, 16 Mar 2000 02:56:07 > > From: "Mike (Perth, Western Australia)" > > > > Subject: CHamber isolation ? > > > > Hi all, > > > > I notice on all engines I've worked on that > > aerodynamics in the crankcase > > aren't given much attention in production engines > > (fair enough for cost), > > > > I have the opportunity to work on and modify the > > crankcase on a straight > > six (RB30ET) block and wondered if its worth trying > > chamber isolation in > > the crankcase. > > > > ie. Rather then having crankcase gases move around > > between chambers from > > various pistons etc, why not isolate each chamber > > with baffles (other > > then a small hole for oil outlet). That way on the > > descending stroke, the > > crankcase gets pressurised and this 'power' is > > returned on the compression > > cycle - or at least some of it - allowing for some > > oil outlet through the > > hole naturally. The overall blowby should still > > allow the oil to exit > > and not upset the bearings... > > > > In essence, each chamber in the crankcase has its > > own oil hole(s) into > > the main crankcase (baffle added so that each > > chamber has its own mini > > crankcase slightly abive the main crankcase)... > > > > Is this completely off beam - or do the F1 guys do > > this sort of thing > > at their usual 16,000 rpm engines ? > > > > I'm only interested actually as its quite easy to do > > and would make an > > interesting experiment... > > > > Tah > > > > :) mike > > > > > __________________________________________________ > Do You Yahoo!? > Talk to your friends online with Yahoo! Messenger. > http://im.yahoo.com > -------------------------------------------------------------------------- - -- > 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: Tue, 21 Mar 2000 19:54:32 +0000 From: Ade + Lamb Chop 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 ------------------------------ Date: Tue, 21 Mar 2000 21:48:53 -0500 From: "nacelp" 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 ------------------------------ End of DIY_EFI Digest V5 #116 ***************************** 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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