--------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3G00004 Date: 03/10/98 From: MARC GERGES Time: 09:17am \/To: ROY WITT (Read 0 times) Subj: Active Handling Salut Roy! RW>>> catalogs and publications. When I run across a small rotary RW>>> solinoid, I'm going to install it on my license plate frame. RW>>> When I see one of those camaras, I'm going 85mph past it with RW>>> the plate down...:) They can have my mug shot if they want it.. MG>> Now, if they find that on your car, at least here, you'd take the MG>> bus for the rest of your trip. RW> The freedom of being an American is overwelming... :-) On the other hand, how far your freedom goes when you overtake a police car at 90 mph, like I did yesterday on the autobahn... :) MG>> Aren't you used that people flash their light when they see a MG>> police patrol to warn other who might be speeding? Works quite MG>> fine, here :) RW> Most Americans will do that, but apparently you've never driven among RW> a bunch of chinamen. They can't see over the steering wheel, they RW> can't drive and they don't give a damn about anything except what's 20 RW> feet in front of their car... And there's so a huge concentration of chinamen in the area you live? cu .\\arc ... Blind people don't bungee jump; it scares the dog too much. --- * Origin: sympathy for the debil (2:270/47) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3G00005 Date: 03/11/98 From: ROY J. TELLASON Time: 08:46pm \/To: PETER HARLE (Read 0 times) Subj: OHM'S LAW Peter Harle wrote in a message to gary hall: -=> Quoting gary hall to Mark Logsdon <=- gh> There must be a way to wire that circuit Volvo used something gh> simular on their Brake light circuit in the Mid seventies. When gh> one brake light failed the difference in the current flow would gh> iluminate a bulb not led on the dash. gh> I saw the schematic once but that was many years ago any Ideas I gh> do remember it was close to what we have been discusing. PH> G'day Gary, PH> The circuit to sense a failed brake light (globe) used by PH> several car and truck manufacturers was based on a relay with PH> two current windings. Whenever the current was balanced the PH> relay would NOT energize (differentially wound). If a globe in PH> either the right or left side of the vehicle went open circuit, PH> then the current flow through the two windings would be out of PH> balance and energize the relay contactor and illuminate a PH> warning light on the dash. I *like* this idea! Never thought about the differential current as a way of telling that there was a problem. Though you'd have to wire such a device (or its equivalent) near the location of the bulbs, based on the way I see a lot of stuff being wired. PH> Similar relays were used to indicate a fault condition in PH> indicator lights, or to operate a "slave relay" for truck PH> trailers etc. These were commonly available from Hella, Bosch, PH> Delco-Remy et all. I have never encountered such a relay, though I don't think it'd be all that difficult to manufacture. Are they expensive? Do you see any way to implement an electronic equivalent of such a relay? <...> PH> However if two headlights are connected in series (as is/was PH> the case in some Japanese cars) prior to switching them in PH> parallel, then it's possible to use the "blown fuse indicator PH> system" of indicating if one or the other globes is faulty. This might be a workable solution in those few vehicles that are for some reason equipped with a 24 volt electrical system (such as some of the military surplus stuff that's out there). PH> However a current coil (or two) wound over a "reed relay" PH> (either NC or NO) and the latter connected to a red or green PH> LED (via the 12 volt supply and a suitable current limiting PH> resistor) would do the job nicely. Hm, reed switches are available alone, too, without the coil. What do you think it would take to do that? This is not the sort of thing that I've messed with too much... email: roy.j.tellason%tanstaaf@frackit.com --- * Origin: TANSTAAFL BBS 717-432-0764 (1:270/615) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3G00006 Date: 03/11/98 From: ROY J. TELLASON Time: 08:53pm \/To: GARY HALL (Read 0 times) Subj: OHM'S LAW gary hall wrote in a message to Mark Logsdon: gh> I work as a Automotive Electronics Techincian. which means I gh> repair all the screw ups the Automotive Engineers Made. You must keep *real* busy, then! I remember some of the stuff I used to run into during the time I ran a battery store... <...> gh> I've not looked for a electronics echo if you know of one let gh> me know There is one, tag is "ELECTRONICS", and Mark and I and Peter and some others from in here can be found in there as well. Since you're interested in this stuff, you might want to grab my files list from here, lots of tech-type stuff in it. email: roy.j.tellason%tanstaaf@frackit.com --- * Origin: TANSTAAFL BBS 717-432-0764 (1:270/615) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3G00007 Date: 03/04/98 From: JARED MORGAN Time: 02:05am \/To: ALL (Read 0 times) Subj: Hemi heads for pontiac 455 Hot off the mill and cnc, came the first Hemi-spherical heads for a pontiac 455cid engine, custom madede valves, and rockers, countless CAD, and shop hours. Testing starts later this month. Calledd RAM-AIR-HEMI's we hope to market these custom made heads soon after testing. Please state your commentss on this subject. --- FMail/386 1.02 * Origin: KastlerocK - Jeannette, PA - 412.527.3749 (1:129/334) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3H00000 Date: 03/12/98 From: BILL REYNA Time: 10:59am \/To: GARY HARDIN (Read 0 times) Subj: 1966 GMC Pickup > The truck starts and idles fine, but under power, it > coughs, sputters > and farts. I can't get it up above about 40mph! I > put a carb kit in it > and it seems to be a bit smoother but the cough and > gasp is still there. [----------^^^^ you said the above ^^^^-----------] Your fuel pump could have a cracked diapharh(sp), just replace it as it is easy to do, you probably should check the fuel filter and the complete fuel line while you're at it. The gasket under the carb will dry out and be a cause of vacuum leaks, so replace it if the rebuilt carb kit didn't provide one. As for the timing marks, get you hands on a repair manual, xerox the important pages or get your own manual, like Chiltons, ect. Also, the distrubutor needs a shot of oil on the cam lobes, then some grease to keep it smooth. Do a tune-up regardless, as it probably needs it. The problem with a stored vehicle is parts dry/rot out and any lubes stiffen or run away. Put some dry out cans through the gas tank to remove any water or whatever and just let it run for a good long time. Please check the brakes out even if they're working now at a brake shop or tear-down to inspect yourself. Any of the above you can test refore replacing if you don't want to buy and swap, but they shouldn't be too expensive. I did alot of playing with 63-64 Chevy panel trucks for the family business years ago. I still use a '71 6cyl(292) dump truck myself and it didn't change much from 63 believe me. Say want a dual carb setup? an old Offenhauser intake that was never used? Leave e-mail here or e-mail at b1reyna@juno.com later -_-_-Bill --- * Origin: Bordertown - Telegram from the Border (1:234/43) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3H00001 Date: 03/12/98 From: DENNIS FARKAS Time: 09:28am \/To: MARK LOGSDON (Read 0 times) Subj: Engineering??????? ML> I worked for one of the Big Three, and I can tell you that the ML> layout for the engine harnesses and wiring were usually done by ML> mechanical engineers and draftsmen. Electrical engineers were ML> usually often not consulted until after wiring problems appeared. Just out of curiosity, who does the Mechanical Engineering in Detroit? The Marketing Departments, or perhaps the Accounting Department? --- Maximus 3.01 * Origin: The Inner Sanctum BBS (403) 248-9005 (1:134/222) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3H00002 Date: 03/12/98 From: GARY HALL Time: 09:43pm \/To: DARYL MACDONALD (Read 0 times) Subj: Timing belt lifespan? On (10 Mar 98) Daryl Macdonald wrote to Jan Deboer... JD> My 1989 Dodge Shadow 2.5 L has 129,000 kilometers on the JD> clock, with the original engine timing belt. JD> Anyone know what the normal lifespan of these belts is? About two years ago get a belt installed or get AAA you are living beyond borrowed time. --- PPoint 2.02 * Origin: Terlton the Oklahoma Jungle 74081 (1:170/302.16) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3H00003 Date: 03/12/98 From: GARY HALL Time: 09:57pm \/To: JARED MORGAN (Read 0 times) Subj: Hemi heads for pontiac 455 On (04 Mar 98) Jared Morgan wrote to All... JM> Hot off the mill and cnc, came the first Hemi-spherical heads for a JM> pontiac 455cid engine, JM> Please state your commentss on this subject. Give me some specks I'll run it on my computerised dyno I need CR intake and exhaust Dia. and camshaft design. What type fuel system is it designed for carb FI ??? --- PPoint 2.02 * Origin: Terlton the Oklahoma Jungle 74081 (1:170/302.16) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3H00004 Date: 03/12/98 From: ROBERT JENKINS Time: 11:57pm \/To: ALL (Read 0 times) Subj: hood im looking for a fiberglass hood for a 68 Olds Cutlass S anybody know of any companies that make stock reperductions. -Robert- --- QScan/PCB v1.19b / 01-0154 * Origin: MicroLink BBS * Dinuba, CA 209-591-8753 (1:214/80) --------------- FIDO MESSAGE AREA==> TOPIC: 246 AUTOMOTIVE Ref: F3I00000 Date: 03/13/98 From: PETER HARLE Time: 04:40pm \/To: ROY J. TELLASON (Read 0 times) Subj: OHM'S LAW / Current sensing? -=> Quoting Roy J. Tellason to Peter Harle <=- PH> The circuit to sense a failed brake light (globe) used by PH> several car and truck manufacturers was based on a relay with PH> two current windings. Whenever the current was balanced the PH> relay would NOT energize (differentially wound). If a globe in PH> either the right or left side of the vehicle went open circuit, PH> then the current flow through the two windings would be out of PH> balance and energize the relay contactor and illuminate a PH> warning light on the dash. RJT> I *like* this idea! Never thought about the differential current as a RJT> way of telling that there was a problem. Though you'd have to wire RJT> such a device (or its equivalent) near the location of the bulbs, RJT> based on the way I see a lot of stuff being wired. Depends on the vehicle of course, but some have separate fuses for the left and right hand sides. That would allow the sensing coils to be located close to the dash/fuses, rather than near the brake lights. Although most cars do have two wires coming back from the lights and joining at the brake light switch or fuse panel. PH> Similar relays were used to indicate a fault condition in PH> indicator lights, or to operate a "slave relay" for truck PH> trailers etc. These were commonly available from Hella, Bosch, PH> Delco-Remy et all. RJT> I have never encountered such a relay, though I don't think it'd be RJT> all that difficult to manufacture. Are they expensive? Do you see RJT> any way to implement an electronic equivalent of such a relay? What isn't expensive these days? Reed relays are available in a wide range of configurations, (NO/NC/CO change over) and current ratings. The reed relays I fiddled with were around 40mm long x 4mm dia. the diffferentially wound coil was of 2 layers of 40 turns of approx. 1mm dia. wound directly over over the glass reed relay body. It wouldn't be difficult to come up with a sensor based on a hall effect device (as per Mark Logsdon suggestion) or an MMF resistor, either could be used within a toroidal current probe. But it's still much more practical to use a differentially wound reed relay approach. Much more reliable compared to setting up, & calibrating electronics to do the same job. (dc coupled op-amps are a pain to set upon a single rail supply!) Roy, you should be able to get these relay units from Truck wreckers etc. I had some Hella & Bosch units as used in "Flashers" but can't seem to find them at the moment, however they were very common some 10 to 15 years ago (I was teaching automotive electronics to auto-electricians at the time), I don't think they've found a reliable solid state substitute yet. --- EzyBlueWave V1.20 01fb000b * Origin: Mt.Druitt TAFE +61-2-9839-1310 FidoNet (3:713/709)