DIY_EFI Digest Friday, July 30 1999 Volume 04 : Number 440 In this issue: double flares Re: Supercharged carb set ups pinout/applications Re: FI Fuel Lines Re: carb s/c and Haltech temp sensor Re: pinout/applications See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Thu, 29 Jul 1999 15:15:03 -0500 From: steve ravet Subject: double flares > Date: Thu, 29 Jul 1999 09:10:32 -0400 > From: Bill Shaw > Subject: FI Fuel Lines > > Hi All, > > I'm in the process of plumbing the fuel system for my Fiat FI conversion. I ran across a term in the > archives I'm not familiar with concerning making steel fuel lines: double flare. Can someone explain > what a double flare is and how to do it? > > Thanks in advance, > > Bill Shaw > > ------------------------------ Double flare is when the metal is folded down into the flare. Think of a single flare with a collar. If you cut the tube down the length it would look like this: single flare \ \_________ _________ / / double flare |\ \\_______ _______ // |/ The metal flares out, then doubles over inside the flare. The tool is expensive, and it's fairly difficult to get right. You create a "bubble" at the end of the line with "tool A", then cave it in to make the double flare with a regular flaring tool. I've been buying pre-flared tubing at Napa, and bending it as necessary. - --steve - -- Steve Ravet steve.ravet@xxx.com Advanced Risc Machines, Inc. www.arm.com ------------------------------ Date: Thu, 29 Jul 1999 15:47:33 -0500 From: "Robert W. Hughes" Subject: Re: Supercharged carb set ups > Just a mention. Studebaker used blow through carbs on it's > supercharged V8s in the 50s and 60s. The trick they used was to > builda pressure box around the whole carb, avoiding the problem of > reduced fuel flow by pressurizing the bowl to boost pressure. The metering > can then be kept consistant. > They used a regular Carter AFB 4-bbl, no modifications other than the > pressure box. Almost. If you look at the top of an ordinary mechanical fuel pump, you will see a small hole in the cover. This is the pressure reference for the pump. Studebaker added a line from here to the blower output so that fuel pressure rose with boost. In case of a ruptured diaphragm in the pump, this would cause the crankcase to be pumped full of gasoline. - -- Robert W. Hughes (Bob) BackYard Engineering Houston, Texas rwhughe@xxx.net ------------------------------ Date: Fri, 30 Jul 1999 17:36:41 -0600 From: cwagner@xxx.net Subject: pinout/applications I have 2 computers that are for a BOSCH KE- Jetronic system. The numbers that I can find are 0-280-800-104(105)/811-906-264 and the other computer has 0-280-800-123/811-906-264-C. I would like to know what cars they came out of and also pinouts/wiring schematics. ------------------------------ Date: Thu, 29 Jul 1999 20:03:04 -0400 From: Shannen Durphey Subject: Re: FI Fuel Lines Bill Shaw writes: > > Hi All, > > I'm in the process of plumbing the fuel system for my Fiat FI conversion. I ran across a term in the > archives I'm not familiar with concerning making steel fuel lines: double flare. Can someone explain > what a double flare is and how to do it? > > Thanks in advance, > > Bill Shaw > > ------------------------------ It's a two step process used to flare steel tubing for brake and fuel lines. The first step "folds" the end of the tubing back towards itself, the second step finishes the "fold" and makes the actual flare. See here: http://www.chevelles.com/tools/tl4.html. Shannen ------------------------------ Date: Fri, 30 Jul 1999 08:33:04 +0800 From: dzorde@xxx.com Subject: Re: carb s/c and Haltech temp sensor > Have another favour to ask from a friean in the Fiat club. Has anyone found a > commercially available sensor that will replace the Haltech air temp sensor. > This is the temp curve required: > > 100C -> 185 ohm > >This exactly matches the description of the GM MAT sensor and coolant temp sensor in my 87 Fiero shop manual. thanks to everyone that replied, it seems the match is a GM unit. So far it matches the 87 Fiero and 91 V6 syclone. > Just a mention. Studebaker used blow through carbs on it's >supercharged V8s in the 50s and 60s. The trick they used was to >builda pressure box around the whole carb, avoiding the problem of >reduced fuel flow by pressurizing the bowl to boost pressure. The metering >can then be kept consistant. > They used a regular Carter AFB 4-bbl, no modifications other than the >pressure box. > > Bill Again thanks to everyone that have replied (too many to answer back individually), I can see I have a lot of work to do. > > >I'm in the process of plumbing the fuel system for my Fiat FI conversion. I ran across a term in the >archives I'm not familiar with concerning making steel fuel lines: double flare. Can someone explain >what a double flare is and how to do it? > >Thanks in advance, > >Bill Shaw Good to see someone else working on a Fiat. Double flare is making the little lump on the end of the fuel line. A normal flare gives you a funnel shaped end, a double flare brings the flared out part back in again to produce a little lump (or ring) around the pipe. ------------------------------ Date: Thu, 29 Jul 1999 18:43:30 -0700 (PDT) From: Orin Eman Subject: Re: pinout/applications > I have 2 computers that are for a BOSCH KE- > Jetronic system. The numbers that I can find > are 0-280-800-104(105)/811-906-264 and the other Audi 4000, 1983 on. This may be K-Jetronic, the database was unclear. > computer has 0-280-800-123/811-906-264-C. I Audi 4000/80, 1983 on. Seems like it was used on the KX, JT and JN engines. This part is superceded by 811 906 264 D. You'd have to buy the Audi 4000 manuals. An expensive proposition. The above are a few applications that I saw with a quick look at an Audi parts database. There are probably more. Orin. ------------------------------ End of DIY_EFI Digest V4 #440 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".