bear351c 10,270 Posted January 15, 2018 Hey sparkies, been a while since I've done a swap to electronic dizzy, if i remember right, the Falcons without the ceramic ballast resistor, had a Pink 'resistor wire' from the ignition to the coil. This needs to be bypassed to get the full 12 volts at the coil, right.?? The big thick pink one on the bottom of the picture, the other is the brown/red. Share this post Link to post Share on other sites
Gerry Ahern 366 Posted January 15, 2018 Hey sparkies, been a while since I've done a swap to electronic dizzy, if i remember right, the Falcons without the ceramic ballast resistor, had a Pink 'resistor wire' from the ignition to the coil. This needs to be bypassed to get the full 12 volts at the coil, right.?? The big thick pink one on the bottom of the picture, the other is the brown/red. And could answer include what to do for a 250 too please?Sent from my iPad using Tapatalk Share this post Link to post Share on other sites
deankxf 20,288 Posted January 15, 2018 interested also.. pretty sure one is 12V when cranking, then drops to the resistor wire from watching a Peter Anderson Video (has heaps now i'd never find it) Share this post Link to post Share on other sites
bear351c 10,270 Posted January 24, 2018 Alrighty then. Cut all the tape off the loom, and traced back the Ballast resistor wire to the firewall, where it joins up to the Ignition wire. Red/grn wire Replaced the wire with a 10 Amp copper jobbie, now just need to insert another wire to use for the driving lights. And re-tape the whole lot back up, nice and neat. 1 deankxf reacted to this Share this post Link to post Share on other sites
bear351c 10,270 Posted January 24, 2018 Oh......and the Nugget has new wheels. 1 1 steve mcqueen and deankxf reacted to this Share this post Link to post Share on other sites
deankxf 20,288 Posted January 24, 2018 2 hours ago, bear351c said: Alrighty then. Cut all the tape off the loom, and traced back the Ballast resistor wire to the firewall, where it joins up to the Ignition wire. Red/grn wire Replaced the wire with a 10 Amp copper jobbie, now just need to insert another wire to use for the driving lights. And re-tape the whole lot back up, nice and neat. so is that the fatter wire in the top photo? that's easy enough then, i thought it went all the way to the ignition switch 1 bear351c reacted to this Share this post Link to post Share on other sites
Slow250XC 1,513 Posted January 24, 2018 Quick question guys, never got around to replacing this wire when i first put the xe electronic dizzy in a decade ago. Could this be causing my tacho not to work? Or barking up the wrong tree? Share this post Link to post Share on other sites
deankxf 20,288 Posted January 24, 2018 1 hour ago, Slow250XC said: Quick question guys, never got around to replacing this wire when i first put the xe electronic dizzy in a decade ago. Could this be causing my tacho not to work? Or barking up the wrong tree? i think it wouldn't affect the tacho, as that runs off the negative coil post 1 Slow250XC reacted to this Share this post Link to post Share on other sites
bear351c 10,270 Posted January 24, 2018 2 hours ago, deankdx said: so is that the fatter wire in the top photo? that's easy enough then, i thought it went all the way to the ignition switch Yep, the one coiled up, I thought they went back to under the ignition barrel, but, obviously not in this case. Even the Mustangs in the 'States have a connection to the red/grn wire. It's a bit fatter than a standard gauge wire, and has a rubbery texture, normal wire can stay straight if you point it at something, this won't. Guess I could've used it to trigger a relay.....? 1 deankxf reacted to this Share this post Link to post Share on other sites
deankxf 20,288 Posted January 24, 2018 i used a relay on an ignition once and it stayed on for some reason. not sure the reason but the auto elec that fixed it mentioned some reason it wasn't advised on ignition 1 bear351c reacted to this Share this post Link to post Share on other sites
Slow250XC 1,513 Posted January 24, 2018 6 hours ago, deankdx said: i think it wouldn't affect the tacho, as that runs off the negative coil post I didn't think so either, but if i don't ask stupid questions who will? 1 bear351c reacted to this Share this post Link to post Share on other sites
deankxf 20,288 Posted July 12, 2020 @Panko look here for falcon one 1 Panko reacted to this Share this post Link to post Share on other sites
Panko 2,480 Posted July 12, 2020 3 minutes ago, deankdx said: @Panko look here for falcon one still confused. So can i run without it or do i need to replace it with something? learning here guys Share this post Link to post Share on other sites
deankxf 20,288 Posted July 12, 2020 Just now, Panko said: still confused. So can i run without it or do i need to replace it with something? learning here guys on the falcon, and F100 i saw.. it's a section of "SPECIAL WIRE" chop it out, replace with normal wire.. on an escort? not sure.. but expect it's same if they don't use a ballast resistor Share this post Link to post Share on other sites
Panko 2,480 Posted July 12, 2020 1 minute ago, deankdx said: on the falcon, and F100 i saw.. it's a section of "SPECIAL WIRE" chop it out, replace with normal wire.. on an escort? not sure.. but expect it's same if they don't use a ballast resistor bah what a pain in the ass. ill check it out tomorrow and see what conclusions i come to. 1 deankxf reacted to this Share this post Link to post Share on other sites
SPArKy_Dave 8,875 Posted July 12, 2020 (info posted here, and to the below linked thread for ref) Points ignition systems, supply full battery voltage to the coil whilst cranking, and circa 9v to the coil whilst engine is running. This is to account for voltage drop during cranking, so a strong spark is provided, (and to limit current through the points, so they last longer). The resistance wire/ballast resistor, is often 1.6 - 1.8 ohms. The coil positive terminal, may have two wires running to it, through one connector - one supplies straight battery voltage ONLY when cranking, the other supplies 9v through the resistance wire (or ballast resistor), via the run/ign circuit. Electronic ignition conversions shouldn't be too fussed on voltages (12/9v), but the coil must suit the supply voltage configuration - ie, resistor or non-resistor type. Some conversions however, require a HEI coil - which has a very low internal resistance - circa 0.7ohms. Examples: GT40R, no ballast resistor… 14V / 1.4 ohms = 10 amps.HEI coil, no ballast resistor… 14V / 0.7 ohms = 20 amps.GT40, no ballast resistor… 14 / 3.4 ohms = 4.1 amps. GT40R with 1.6 ohm ballast resistor… 14 / 3 ohms = 4.6 amps. GT40 with 1.6 ohm ballast resistor... 14 / 5 ohms = 2.8 amps. (no good) Part number Primary Primary Primary Turns Secondary Secondary Secondary Output KV Peak VOLTS Turns Ratio Ballast Short Resistance Inductance Resistance Inductance Turns 50pf/1 Meg Current resistance Order Ohms mH K Ohms Henries @ 100Hz Amps number 9 220 061 100 3.1-3.4 13.8 - 15.2 345 6.8-9.2 56.7 22200 26.3 3.4 12 64.3:1 SU120 9 220 061 308 3.2-3.5 14.0-15.5 345 8.0-10.0 68.8 24500 26.3 3.3 12 71:1 GT40 9 220 061 400 1.45-1.55 6.3-6.7 240 6.8-9.2 50 22200 32 5.24 9 92.5:1 1.5 SU120R 9 220 061 430 1.25-1.35 6.3-6.7 240 8.0-10.0 66.1 24500 29.1 3.7 9 102:1 1.8 GT40R Share this post Link to post Share on other sites
superyob 270 Posted December 10, 2023 I have been running a GT40 coil with my standard Bosch points system, since I rebuilt the 302W engine 13 years ago. It runs smooth as glass most of the time but sometimes grumbles and runs rough. I could never figure out why. Is it because it has a GT40 instead of a GT40R??? 1 SPArKy_Dave reacted to this Share this post Link to post Share on other sites
bear351c 10,270 Posted December 12, 2023 Could well be. As Sparky Dave said, you need the Resistor coil, for anything with contact points. Doesn't matter if it's a "coke can" or a T -coil, as long as it has the R after the GT40. 2 superyob and SPArKy_Dave reacted to this Share this post Link to post Share on other sites
superyob 270 Posted December 12, 2023 Thanks . I fitted a GT40R today and it was smooth as... 1 SPArKy_Dave reacted to this Share this post Link to post Share on other sites
SPArKy_Dave 8,875 Posted December 12, 2023 It's the little things, that make all the difference! 1 superyob reacted to this Share this post Link to post Share on other sites