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Return-Path: Date: Fri, 30 Jan 1998 09:06:12 -0700 (MST) From: owner-fordtrucks61-79-digest To: fordtrucks61-79-digest Subject: fordtrucks61-79-digest V2 #56 Reply-To: fordtrucks61-79 Sender: owner-fordtrucks61-79-digest fordtrucks61-79-digest Friday, January 30 1998 Volume 02 : Number 056 ======================================================================= Ford Truck Enthusiasts - 1961-1979 Trucks Digest Visit our web site: http://www.ford-trucks.com/ - - - - - - - - - - - - - - - - - - - - - - - To unsubscribe, send email to: fordtrucks61-79-digest-request with the word "unsubscribe" in the body of the message. For help, send email to the same address with the word "help" in the body of the message. ======================================================================= In this issue: My 351M Head Gasket Saga Continues [Bzysignl 460 Question [Bzysignl Re: Timing ["Gary, 78 BBB" ] Re: Duraspark II [Brian ] Re: Duraspark II [Brian ] Re: Varsol [Dennis Pearson ] Ballast resistor [am14 Re: Duraspark II ["Gary, 78 BBB" ] Re: Varsol [Randy Collins ] Re: long rods and their effect on piston speed. ["Gary, 78 BBB" Re: suicide doors ["Gary, 78 BBB" ] RE: 460 Question [Sleddog ] Re: long rods and their ... spreadsheet [JRFiero Re: Timing [danadeb RE: suicide doors [Sleddog ] RE: long rods and their effect on piston speed. [Sleddog Re: Duraspark II [danadeb RE: long rods and their ... spreadsheet [Sleddog ] Re: Varsol [danadeb Re: Ballast resistor [danadeb Re: Duraspark II ["Gary, 78 BBB" ] Re: Duraspark II ["Gary, 78 BBB" ] Re: Varsol ["Gary, 78 BBB" ] ======================================================================= ---------------------------------------------------------------------- Date: Fri, 30 Jan 1998 07:24:44 EST From: Bzysignl Subject: My 351M Head Gasket Saga Continues Well guys, I have re-installed the heads. I saw no obvious indications of a blown head gasket, but that water was coming from somewhere. That coupled with the incredible amount of GOO that was built up on the intake valves has me excited to get the dude running again. I also tore down each lifter and cleaned them out. Some seemed totally stuck. I decided to do the timing chain while I was at it, and boy was that chain worn. It had about 3/4 of an inch play on each side at the same time. I bought a double roller that allows me to reset the timing to 0 deg BTDC. So, I'm about to put the timing chain cover back on. Still have to put the rockers back on. Intake manifold, distributer, radiator has to go back in. Almost there, wish me luck. Thanks for all the help and general info so far. Any tips or comments, please post to group or email at gpark can't get on my home pc very often. Lately I'm too grimy, and having too much fun. GP ------------------------------ Date: Fri, 30 Jan 1998 07:36:26 EST From: Bzysignl Subject: 460 Question Well, between the work I've been doing on the 351 and reading everyone gush about the 460, I have the urge to rebuild one of these motors. I don't even know what it will end up in, but it will probably be a truck, and probably be a 74 or earlier, to get out from under the SMOG police here in CA. I found one in the paper and here's it's story- it is from a 76 Van, and supposedly was running when it was pulled. The main bearings went bad, but did not spin. The oil pressure light came on, and ended this motors (first) life. Here's my question for the 460 Gurus: How is this year as far as 460's go? Are they all the same more or less? The guy wants $250, and it is complete exh man to carb, except for the alternator. Good deal? What are the issues with putting this motor in a 74 or older F150 of F250? I remember someone ran into an issue with a missing crossmember that had to be added. Any other special things to consider? Thanks for the info. Please email to gpark ------------------------------ Date: Fri, 30 Jan 1998 07:57:23 +0000 From: "Gary, 78 BBB" Subject: Re: Timing > From: ECampb5214 > Date: Thu, 29 Jan 1998 23:21:04 EST > Subject: Timing > To adjust timing, I can mearly unbolt the bolt at the bottom of > my > distributor, and turn clock wise to advance, right? All ford's turn counter clockwise as you look down on the dist. So to advance you turn clockwise. If you are doing it without a timing light remember that one degree at the distributor is 2 degrees of crank rotation. BTW, I don't recommend doing it by ear. At idle the engine wants about 40 deg advance with idle mixture at it's best setting which is very lean. When you try to accellerate then the mechanical advance will advance it even more. Since you only need up to 38 degrees total at max rpm, at WOT this will be way too much advance. You need to determine how much advance your vac pulls in to do this right. It's a combination of mechanical and vac that keeps the engine at it's best timing over all rpms. The object is to have it all in between 3k and 4k rpm and let the vac retard it as needed under load or advance it at cruise which needs about 40 - 50 degrees advance for optimum economy. Some may respond to this with "I don't need no stinking vac!" but ask them how the mileage is..................and my engine will ren just as hard as theirs since the vac gets out of the loop at WOT anyway :-) My theory on this is you set the mechanical to operate the engine at WOT for best performance at all rpms, then mess with the vac to get the economy and off idle driveability back up to snuff :-) This is a two step operation and may require different carb tuning (idle mixture for sure) for each phase to prevent off idle stalling etc without the vac in stage one. Buy a timing light :-) Where's Murphy when you really need him?? - -- Gary -- ------------------------------ Date: Fri, 30 Jan 1998 07:40:08 -0500 From: Brian Subject: Re: Duraspark II danadeb > > I have said it before and I will say it again. > > Go to this site go directly to this site! > > Don't even ask anyone's opinion till you have seen this site!!!!! > > http://www.ford-trucks.com//lc/lc.php?action=do&link=http://www.wrljet.com/engines/duraspark.html > > Not that I don't want to help but there is so much misinformation on the subject > that it is like a fish story it just keeps getting worse and worse!!! > > Flame suit ready!!! > > Dana > > PS if you don't have a browser then let me know and I will E-Mail the site to > you piece by piece!!! > +-------------- Ford Truck Enthusiasts - 1961 thru 1979 --------------+ > | Send posts to fordtrucks61-79 > | List removal information is on the web site. | > +---------- Visit Our Web Site: http://www.ford-trucks.com/ ----------+ Been there and done that !! I have printed out there complete story on the Duraspark II....Its GREAT !! But my problem is not having any wiring under the hood too start with. That makes it a little bit more challenging. When you start to rewire from total scratch, its hard to follow their diagram. You first have to wire for the connections they suggest you hook up the ignition to ! Brian ------------------------------ Date: Fri, 30 Jan 1998 07:47:47 -0500 From: Brian Subject: Re: Duraspark II Don Grossman wrote: > > Hold on here a minute, > > Which two wires are we talking about here the two from the coil or the > two out of the ignition module? > > The coil wire gets the resisted wire. This should be the same wire that > would power the coil for the 64. This was also the same for 63. There > is a resistance wire just after the ignition switch. It should be a > slightly larger wire. Mine is pink. No it is not a fuseable link so I > will just defuse that right now ;) > > If you are talking about the power for the ignition module it should be > 12v constant. You can tap right into the wire that comes off the > ignition switch but before the resistance wire. > > The other wire goes to the I side of the starter relay. It could go > anywhere there is only power during starting only. > > Which box do you have? If it is the early box it will be like this > > red+blue = run power > blue = start wire > > later box > > red+blue = run power > white = start wire. > > The funny thing is that after 78 I see a full 12V going to the coil? > > Whats up with that > -- > Don Grossman > duckdon > > 63 Ford F-100 4x4 67' 390, t-98, Spicer 24, Dana 60, Dana 44, power > steering, power brakes, and now ON BOARD AIR! > +-------------- Ford Truck Enthusiasts - 1961 thru 1979 --------------+ > | Send posts to fordtrucks61-79 > | List removal information is on the web site. | > +---------- Visit Our Web Site: http://www.ford-trucks.com/ ----------+ I've got the red & white system, But again...my problem is that ALL the wiring for the engine compartment was gone when I purchased this truck. It had the engine removed, There was nothing for wiring except the headlights and the alternator harness. So that's why I'm somewhat confused. I don't want to burn out the module by hooking up the wrong thing to it.There was no wiring for the coil under the hood. And since I'm far from wise on this wiring stuff...I need all the help I can get !! I do have the engine rewired enough now that it does turn over. But I'm just not sure where to find the connections for the module. There was know wiring for the sensors. (oil & water) I installed mechanical guages so that took care of that. Brian ------------------------------ Date: Fri, 30 Jan 1998 06:31:57 -0800 From: Dennis Pearson Subject: Re: Varsol Thanks for your message at 10:29 PM 1/29/98 -0800, Deacon. Your message was: >>Do tell Deacon!!! >> >>Dana > >You'll get scared! But you asked. :) > > When I was just a young lad of 7, my Dad was trying to start and old car >using a small can of gas. All these gasoline stories got me going. Brings back memories of when I was 17 (a couple years ago) and working in a Signal(should give you a clue to my age) station in Isssaquah (Is this too much detail?). The owner, Ruby (Harold), would clean out his lube bays with gas from the pump. Actually, he would have me do it. Scared the cr*p out of me even then. On days he REALLY wanted to clean, he would have me clean the floors with battery acid. I went through more damn shoes at that job... Oh yeah, there was a cherry 1962 Ford pickup parked outside the station, but nobody noticed cause it was only two years old (just to keep it legal for the group). ------------------------------ Date: Fri, 30 Jan 1998 09:34:15 -0500 From: am14 Subject: Ballast resistor Gary says: >> The ballast resistor is a white piece of pourous ceramic with a wire wound ferite core resistor in it about 3" long and about 3/4" wide and should be somewhere on the firewall or fender wells. Since it's a 64 and had points I'm not sure where it would be or if it may have been removed by the previous owner. 1st let me say I'm not real familiar with the Ford Trucks prior to '73., but I'm real familiar with Ford Cars back to around '50. I always thought Ford (cars & trucks) used a special resistance wire, and not a Ballast resistor like MOPAR did. Am I wrong on this one also????????? Azie ------------------------------ Date: Fri, 30 Jan 1998 09:42:18 +0000 From: "Gary, 78 BBB" Subject: Re: Duraspark II > Date: Thu, 29 Jan 1998 15:53:22 -0800 > From: marko > Subject: Re: Duraspark II > Unlike your D*dge, which has a small white ceramic brick mounted on > the firewall with a coily wire inside, looking much like a heating > element from a toaster or baseboard heater or (get this Azie I AM > old) an electric fireplace, your Ford has just ensured that the wire Ok, now you've done it! I know one of my 78's has a "Dodge" type ballast resistor.............er......maybe one of the other 7 vehicles?? All fords of course :-) I have recently had an 88 Festiva, 92 Tempo, 92 T-bird, 94 T-bird, 91 F-150, 97 F-150 and my two 78's plus a GM blue bird school bus (my son's) and I know I saw a ballast resistor on one of these recently and it wasn't the bus..........sooooooooooooo, I'll hafta go look :-) BTW, I only have to pay for the 94 and 78 bronco (thank god! :-)) The rest are my kid's or paid off :-) Where's Murphy when you really need him?? - -- Gary -- ------------------------------ Date: Fri, 30 Jan 1998 07:55:16 -0700 From: Randy Collins Subject: Re: Varsol The dangerous thing about using gas are the fumes. They are heavy and move across a floor and if an open flame is present in an enclosed area it will get to it.Slowly but it will get to it. If you use gas to clean parts, recognize it is dangerous have only what you need out in the open, don't think it won't happen to you, throwing caution to the wind, just clean parts outside to be safe. Randy and Dana aren't just safety fanatics. Their speaking the truth. Deacon: I am sorry to hear about your first hand experience with the dangers of flammable materials. I think it is funny that you refer to me as a safety freak. If you knew me you probably would reconsider. Did I mention my C-6 fell off the transmission jack last month? That could have been bad real bad. The reason I am so persistent about using things like gasoline as a cleaner is that often we forgot about the consequences of our actions. Why take a chance using something as flammable and dangerous as gasoline in an enclosed environment when there are good alternatives available? I assure you if mineral spirits (paint thinner) wasn't a good cleaner I wouldn't use it. It works very well. Often I use solvents that that are much more volatile than gasoline. When I use these solvents I use them I make sure there is adequate ventilation and to minimize the explosion risk I take the solvent saturated rags outside to evaporate. All I am trying to say is that compared to the risk of using gasoline mineral spirits is cheap and it works well. I am out of town for the week. If anyone requires the exact flammability details of mineral spirits I can get an MSDS sheet next week when I am back at the office and either get them a copy or help interpret the information. Wanna talk about the dangers of spontaneous combustion? Later, Randy Collins Boise, Idaho rcollins 1975 Ford F250 4WD Supercab "Muscle Truck" 460 SUPER COBRA JET Short Block Completed...Stage II head work ------------------------------ Date: Fri, 30 Jan 1998 09:14:44 +0000 From: "Gary, 78 BBB" Subject: Re: long rods and their effect on piston speed. > From: Sleddog > Subject: long rods and their effect on piston speed. > Date: Thu, 29 Jan 1998 23:36:27 -0500 > using this, it shows that a longer rod decreases piston velocity > near TDC and increases it near BDC with the same trend in piston > acceleration. This doesn't make sense to me but I haven't really analyzed it yet. Seems to me the upper left and lower right quadrants would have identical numbers only reversed and the same tor the other two quadrants? Anybody want to tackle this one? I see accelleration in the upper right and lower left quadrants and decelleration in the other two but since the angles of incedence are identical the speeds should also be identical for any given point mirrored to the other hemisphere?? Where's Murphy when you really need him?? - -- Gary -- ------------------------------ Date: Fri, 30 Jan 1998 08:19:23 +0000 From: "Gary, 78 BBB" Subject: Re: suicide doors > From: "Deacon" > Subject: Re: suicide doors > Date: Thu, 29 Jan 1998 16:05:34 -0800 > The article is from the Aug '97 issue of Ford Truckin' and the Deacon, do you have the subscription address handy for that magazine? I've never seen it on any stands or I'm sure I would have picked it up. The only magazines I've seen for fords have all been for the ugly, useless Mustang and all they deal with is the puny 302 (whoa, I'm outahere :-)), what good does that do anyone?? Petersons often puts out an annual ford engines collectors or reference edition which I try to grab if I see them but I haven't seen one in a while. Most of the "Truckin" magazines are for guys who want to look at naked girls and expensive shop built trucks. Then there's the "Gang" rags from the back alleys of LA.......... Where's the real ford stuff, like normal, ordinary, sane, blue collar worker, non drug dealer truck enthusiast want?????? Where's Murphy when you really need him?? - -- Gary -- ------------------------------ Date: Fri, 30 Jan 1998 10:02:27 -0500 From: Sleddog Subject: RE: 460 Question 74 is not a good, or bad year. 68 and 69 were great years, and then till sometime in 80 they are all good motors, just need a little help. they are basically all the same except between the van-truck and car models have different pans, exhaust mans, etc. getting one out of a van is good, as it already has the right oil pan, pickup tube, timing cover, and exhaust manifolds you need for a truck. it may be a good deal, but how do you know that what he said is true? maybe there is alot more wrong than just a loss of oil pressure. the crank may need regrinding, all new bearings inc. the cam bearings, new oil pump, and the possibility of hard parts you won't know of till you get inside. i myself would pay between 150-200 for it if it "looked" good and $250 if could pull the pan first to look at it. sleddog Here's my question for the 460 Gurus: How is this year as far as 460's go? Are they all the same more or less? The guy wants $250, and it is complete exh man to carb, except for the alternator. Good deal? What are the issues with putting this motor in a 74 or older F150 of F250? I remember someone ran into an issue with a missing crossmember that had to be added. Any other special things to consider? Thanks for the info. Please email to gpark +-------------- Ford Truck Enthusiasts - 1961 thru 1979 --------------+ | Send posts to fordtrucks61-79 | List removal information is on the web site. | +---------- Visit Our Web Site: http://www.ford-trucks.com/ ----------+ ------------------------------ Date: Fri, 30 Jan 1998 09:29:26 EST From: JRFiero Subject: Re: long rods and their ... spreadsheet In a message dated 98-01-30 01:09:31 EST, you write: spreadsheet" as the subject and i shall email you a copy. >> Sleddog - I'd like a copy of that spreadsheet, please. I'm going to have to quibble with this next statement, tho. Whatever effect rod length has should be the same at TDC and BDC, and opposite halfway down. If velocity is lower at top and bottom it has to be higher in the middle to make it all the way down in the same amount of time. and increases it near BDC with the same trend in piston acceleration. >> ------------------------------ Date: Fri, 30 Jan 1998 07:20:20 -0800 From: danadeb Subject: Re: Timing Gary, 78 BBB wrote: > > All ford's turn counter clockwise as you look down on the dist. What about "I" 6s? They rotate clockwise! > So > to advance you turn clockwise. If you are doing it without a timing > light remember that one degree at the distributor is 2 degrees of > crank rotation. > > BTW, I don't recommend doing it by ear. At idle the engine wants > about 40 deg advance If you set the initial to 40 deg you will have a bear of a time turning the engine over IMNSHO! Also why is there no mention of these type of settings in any book I have read? This is my opinion!!!!! Dana ------------------------------ Date: Fri, 30 Jan 1998 10:16:02 -0500 From: Sleddog Subject: RE: suicide doors - ---snippage--- Where's the real ford stuff, like normal, ordinary, sane, blue collar worker, non drug dealer truck enthusiast want?????? they are a dying species! of course i can't tell you who the "new ones" are, as i can't see them in their black out windows, lowrider, so much chrome i get blinded by the sun, and even if i wanted to i can't get close enough to take a good look as the music is so loud it takes the few hairs left on my head just about rips them out by the roots, ford explorers that mommy and daddy bought for them for their 16th birthday even though they still haven't learned how to use a turn signal or properly enter an interstate highway or that they bought with money from people who can't afford it but bought drugs from people who could, but don't use them because it is the user that's the loser and ........... i am sorry, just venting, i live next to the projects and , uh that's really not about ford trucks though .... ------------------------------ Date: Fri, 30 Jan 1998 10:30:30 -0500 From: Sleddog Subject: RE: long rods and their effect on piston speed. well gary, first, this has all been assuming a constant crank velocity. of course this isn't the case, as the crank changes speed constantly. but we can still get the general idea. what you say, would first seem to be the case, but mathimatically it is not the case. this means also that the piston travels a greater linear distance between 90 BTDC to 90 ATDC than the 90 BBDC and 90 ABDC. the difference is minor, but at the ragged edge of performance it can mean the difference between broken rods, and reliability. offsetting the piston pin also changes the piston speed and velocity. 460's come from ford offset one direction, actually creating an effective shorter rod, but offsetting to the other side makes an effective longer rod - - on the down stroke. many other brands have this also, for example many mopars that have been built for performance over the years the pistons are just hung the opposite way and the piston acts as if it had about a .150" longer rod. with a centered piston pin, the upper 2 quadrants are equal and opposite, and the bottom two are, not criss crossed as you may initially think. to find piston speeds, etc, you need to calculate from TDC to BDC on either side of the cranks throw. sleddog - ---------- From: Gary, 78 BBB[SMTP:gpeters3 Sent: Friday, January 30, 1998 4:14 AM To: fordtrucks61-79 Subject: Re: long rods and their effect on piston speed. > From: Sleddog > Subject: long rods and their effect on piston speed. > Date: Thu, 29 Jan 1998 23:36:27 -0500 > using this, it shows that a longer rod decreases piston velocity > near TDC and increases it near BDC with the same trend in piston > acceleration. This doesn't make sense to me but I haven't really analyzed it yet. Seems to me the upper left and lower right quadrants would have identical numbers only reversed and the same tor the other two quadrants? Anybody want to tackle this one? I see accelleration in the upper right and lower left quadrants and decelleration in the other two but since the angles of incedence are identical the speeds should also be identical for any given point mirrored to the other hemisphere?? Where's Murphy when you really need him?? - -- Gary -- +-------------- Ford Truck Enthusiasts - 1961 thru 1979 --------------+ | Send posts to fordtrucks61-79 | List removal information is on the web site. | +---------- Visit Our Web Site: http://www.ford-trucks.com/ ----------+ ------------------------------ Date: Fri, 30 Jan 1998 07:37:58 -0800 From: danadeb Subject: Re: Duraspark II You can hook the red wire to the ignition switch lead that has 12V in the run position only. Hook the White wire to the ignition switch lead that has 12V only when the key is in the start position. The ballast resister is probably under the dash and pink as said before. I don't think that you can read the 6-8V it will allow unless there is a load on the wire. If the dash is out follow the run wire from the ignition switch to the firewall if you notice a thicker then the rest wire doubled back on itself under all that black tape that is probably the one. Also the wire that used to come from the "I" terminal of the starter relay should hook to it at a point near where it starts to go through the firewall. Hope it helps. BTW if you have trouble understanding the schematic down load it to your pc ( right click on it and save it) use a paint program to mark questions on it and E-Mail it to me direct. I just did the swap swap and I built all of the wire harness my self. Dana danadeb ------------------------------ Date: Fri, 30 Jan 1998 10:34:05 -0500 From: Sleddog Subject: RE: long rods and their ... spreadsheet i'll send you one. but, math doesn't lie. the reason for the difference is because of the way vectors (velocity or acceleration) are computed. for a scothch yoke type mechanism the velocities are the same in each quadrant, but not for a simple rod & crank. sleddog - ---------- From: JRFiero Sent: Friday, January 30, 1998 9:29 AM To: fordtrucks61-79 Subject: Re: long rods and their ... spreadsheet In a message dated 98-01-30 01:09:31 EST, you write: spreadsheet" as the subject and i shall email you a copy. >> Sleddog - I'd like a copy of that spreadsheet, please. I'm going to have to quibble with this next statement, tho. Whatever effect rod length has should be the same at TDC and BDC, and opposite halfway down. If velocity is lower at top and bottom it has to be higher in the middle to make it all the way down in the same amount of time. TDC and increases it near BDC with the same trend in piston acceleration. >> +-------------- Ford Truck Enthusiasts - 1961 thru 1979 --------------+ | Send posts to fordtrucks61-79 | List removal information is on the web site. | +---------- Visit Our Web Site: http://www.ford-trucks.com/ ----------+ ------------------------------ Date: Fri, 30 Jan 1998 07:48:15 -0800 From: danadeb Subject: Re: Varsol WOW Deacon! I thought I was going to be a humorous gas story not a Horror story. Glad you are OK ( Well at least physically ;) )the list would not be the same with out ya! Where is our resident chemist? BTW, pound for pound, gas has more BTUs then dynamite! Dana ------------------------------ Date: Fri, 30 Jan 1998 07:52:46 -0800 From: danadeb Subject: Re: Ballast resistor am14 > 1st let me say I'm not real familiar with the Ford Trucks prior to > '73., but I'm real familiar with Ford Cars back to around '50. I > always thought Ford (cars & trucks) used a special resistance wire, and > not a Ballast resistor like MOPAR did. Am I wrong on this one > also????????? > > Azie NO! You are correct sir! ( that was my best Ed McMan ( sp? ) impersonation ) Dana ------------------------------ Date: Fri, 30 Jan 1998 10:52:55 +0000 From: "Gary, 78 BBB" Subject: Re: Duraspark II > Date: Fri, 30 Jan 1998 07:47:47 -0500 > From: Brian > Subject: Re: Duraspark II > it does turn over. But I'm just not sure where to find the > connections for the module. There was know wiring for the sensors. > (oil & water) I installed mechanical guages so that took care of > that. All vehicles since the dawn of time.............Ok, maybe not but I'm sure the 64 has a start pin and run pin on the ignition switch. Go into the dash, find these pins and "try" to follow them throgh the fire wall. If you can't get through the fire wall with them then splice into them at a convenient location, soldering the joints you make, and run two distinctly colored wires (preferably red for run and white for start) out to the module area. Get an old "Dodge" or "ford" ballast resistor and hook it in series with the red wire to the module and since the starter works you don't need to worry about that part, just run the start pin wire to the white wire on the module and you're all set. If you have the later harness with green wire in the 4 pin plug and same model distributor pickup then you just plug it all in and you're done. I'll have to double check the coil connections (forgot where the red wire goes) but they are part of the harness too so should be a no brainer. Where's Murphy when you really need him?? - -- Gary -- ------------------------------ Date: Fri, 30 Jan 1998 10:24:44 +0000 From: "Gary, 78 BBB" Subject: Re: Duraspark II > Date: Thu, 29 Jan 1998 20:48:30 -0800 > From: Don Grossman > Subject: Re: Duraspark II > > Be careful here the. > > > The "I" side of the starter relay has voltage from 2 sources. one > > is the ignition switch ( 12V ) the other is from the ballast > > resister. ( 6-8V ) Since the "I" side wire bypasses the ballast > > resister it has to be attached between the ballast resister and > > the coil thus it has some voltage as long as the kay is in the > > start or run positions. The proper place is to put the white wire > > is on the "s" terminal which supplies 12V only when the key is in > > the Start position. Here's a post I sent to the bronco list a while back. There are a couple more with additional info but I think this one will cover most of it: > Well, I grabbed the wrong book! It has the Canadian version which > seems to be the same wiring scheme and the book calls it the > "standard" dura spark II but it's harder to decipher than the one in > my 79 Peterson's manual so I'll throw out a bit here and bring in > the Peterson's tomorrow to finish up. > > Most Ford vehicles going way back to the mid 60's at least have a > starter relay with one or two small wires on it to operate the > selenoid. I'm familiar with the two wire version, one being the > trigger and the other being the 12v signal to the coil for start > mode. As long as the selenoid is energized the coil gets 12 v. When > deenergized the ignition has to find another source of power which > comes through the ballast resistor at about 6-8 v. > > Apparently power is supplied from the ignition switch to the start > relay, coil and ignition module at the same time in parallel more or > less so that the distributor wiring is also affected by these > voltage values through the module. The shematic I have today leaves > too much to the imagination so I'll confirm all this tomorrow with > my Peterson's. This manual also has the complete run down on the > years the wires were switched which I'll post tomorrow as well. > > I had to replace a starter once because the module shorted > internally to the white wire roughly 2v in run mode which was > sufficient to keep the selenoid energized which kept the starter > energized and 12v to the ignition as well. Starters don't like to > spin at 12k rpm all day long :-( > > As already mentioned, at some point the orange and purple wires > changed purposes but the colors didn't change so while the plugs > will match up and the colors will look right the system won't > operate correctly if you mix them up. Get the box with the blue > seal BTW. > > Basically, the Purple, Black and Orange wires from the module go to > the distributor. The black wire is ground. The green wire in the > module goes more or less directly to the dist side of the coil. Red > and white go to the ignition switch, red to the run terminal and > white to the start terminal. > > In the case of the points ignition there should be a wire coming > from the run terminal of the switch to the ballast resistor to the > coil and another wire coming from the start terminal of the switch, > either to the start relay and then to the coil or two wires, one to > the realay and one to the coil depending on which relay it uses. > These wires can be used to hook to the red and white wires of the > Dura Spark module as described above. > > The wire which went to the batt side of the original coil can then > be hooked to the batt side of the new coil assuming the above is > true and the green module wire can then be connected directly to the > dist side of the coil. > > The other three wires should have a plug on them which plugs > directly into the distributor or harness leading to the distributor, > either 3 or 4 pins. The one with 4 pins simply has the dist green > wire in the plug instead of by itself and a pigtail going to the > coil from the mating plug which is one of the several changes which > were made basically to this plug arrangement. If you happen to get > the orange and purple wires crossed the engine will not start at all > and I found that the red and white wires are not necessarily matched > either and crossing them will cause the engine to start but won't > keep running when you release the key..... To access the rest of this feature you must be a logged in Registered User Of Ford Truck Enthusiasts
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