mainer311 Posted January 29, 2018 Author Report Share Posted January 29, 2018 Put the single point in the autozone cart and try to check out. “Special order item is no longer available.” Quote Link to comment
mainer311 Posted January 29, 2018 Author Report Share Posted January 29, 2018 You get hotter spark by using a 3ohm coil and no ballast. The coil sees full battery voltage instead of the 8V (~4V drop) from the ballast. Quote Link to comment
Crashtd420 Posted January 29, 2018 Report Share Posted January 29, 2018 Put the single point in the autozone cart and try to check out. “Special order item is no longer available.” That's probably why orielly isn't listing it... Quote Link to comment
racerx Posted January 29, 2018 Report Share Posted January 29, 2018 Supposedly, they have to get enough orders before they list them, per customer service a5t Oreily when I ordered awhile back. Quote Link to comment
datzenmike Posted January 30, 2018 Report Share Posted January 30, 2018 You get hotter spark by using a 3ohm coil and no ballast. The coil sees full battery voltage instead of the 8V (~4V drop) from the ballast. Uhhh... no. 1.5 ohm coil + 1.5 ohm ballast = 3.0 ohms. OR 3.0 ohm coil Current flow is E/R or 12 volts/3 ohms = 4amps. No matter how you slice it 3 ohms is 3 ohms and 4 amps is 4 amps of current. As a magnetic field is dependent on current flow through the windings a 3 ohm coil will make as much spark as a 1.5 ohm coil and a 1.5 ohm ballast. The coil with ballast actually has a hotter starting spark as the ballast is by-passed by the ignition switch in the start position. Then we get 12/1.5 = 8 amps of current or 2 times the current and a hotter spark. Naturally the points can never survive that amount of current and would quickly burn out. The EI system uses a 0.8 ohm to 1.0 ohm coil. 12/0.8 = 15 amps 12/1.0 = 12 amps. As you can see the EI is going to make a shit ton of extra spark. Quote Link to comment
mainer311 Posted January 30, 2018 Author Report Share Posted January 30, 2018 Hmmm, so, if that’s true, gapping the spark plugs wider could cause problems. Technically my resistance did go down slightly, so maybe a little more current. I only gapped the plugs to .040”. I may bump them back to .035”. Looks like I potentially have a matchbox dizzy coming. I’m assuming I’ll have to go get yet another coil to run with that. Quote Link to comment
datzenmike Posted January 30, 2018 Report Share Posted January 30, 2018 Try 0.032" if reducing them. Takes more voltage to fire a plug as the throttle is increased. Could be the problem and a very cheap fix if it is. Yes the EI uses a 0.8 to 1.0 ohm coil. Then you can try a wider gap. Quote Link to comment
banzai510(hainz) Posted January 30, 2018 Report Share Posted January 30, 2018 Using the Stock Bypass set up is EZER for starting cause its only the stock coil resistance it sees of say 1.6 ohms then when key snaps to ON it goes thru the Ballast and the coil. The coil is 3 ohms all the time unless it can sense the START LOAD and adjust to get that hotter(more current flow) to the ignition/coil Quote Link to comment
mainer311 Posted January 30, 2018 Author Report Share Posted January 30, 2018 Yeah, I get it now. I always thought that Pertronix somehow got you a stronger spark, and I guess it does marginally since it's electronic and not mechanical (somewhat more control over the coil field collapse). I just bought the matchbox that was listed in the classifieds and it appears to come with the pedestal and everything. Found my steering idler is shot last night, so I'll pickup a later model 620 coil at the same time. Quote Link to comment
datzenmike Posted January 30, 2018 Report Share Posted January 30, 2018 I asked about this. If the Pertronix is up to it, you could use a lower impedance coil and get a hotter spark, but only if it can handle it. If no,t the pertronix only gets rid of the points and all the replacement, adjusting BS. 1 Quote Link to comment
mainer311 Posted January 30, 2018 Author Report Share Posted January 30, 2018 Yeah, I'm going full EI now hopefully. This matchbox should do the trick. I run an 0.044" gap in my Roadster running pertronix with a 3 ohm coil, but it was a direct drop in. Quote Link to comment
racerx Posted January 30, 2018 Report Share Posted January 30, 2018 I asked about this. If the Pertronix is up to it, you could use a lower impedance coil and get a hotter spark, but only if it can handle it. If no,t the pertronix only gets rid of the points and all the replacement, adjusting BS...yep, you set it and forget it. Quote Link to comment
Doctor510 Posted January 30, 2018 Report Share Posted January 30, 2018 Yeah, I'm going full EI now hopefully. This matchbox should do the trick. I run an 0.044" gap in my Roadster running pertronix with a 3 ohm coil, but it was a direct drop in. Way too much gap for Pertronix, .035" max. Do not use the NGK 11 series (wide gap)at thi setting BP6ES or BPR6ES are best. Quote Link to comment
datzenmike Posted January 30, 2018 Report Share Posted January 30, 2018 What dies set it and forget it mean? Yes it will work on an EI coil or NO it won't???? Quote Link to comment
Crashtd420 Posted January 30, 2018 Report Share Posted January 30, 2018 the pertronix only gets rid of the points and all the replacement, adjusting BS. I'm pretty sure the last part of this statement is true.... it just a points replacement.. Quote Link to comment
Stoffregen Motorsports Posted January 30, 2018 Report Share Posted January 30, 2018 Right. Also, the ohm requirements are pretty specifically stated in the Pertronix literature. No argument required. Quote Link to comment
mainer311 Posted January 30, 2018 Author Report Share Posted January 30, 2018 What dies set it and forget it mean? Yes it will work on an EI coil or NO it won't???? I think he meant set it and forget it, as in no adjusting dwell or gap or replacing points as a wear item. Once the Pertronix is installed, there's no fussing with it. And no, I don't think it will work with less than a 3 ohm coil. It says right on step 4 that you can't run anything less than 3. http://www.pertronix.com/docs/instruction-sheets/1181.pdf 2 Quote Link to comment
racerx Posted January 30, 2018 Report Share Posted January 30, 2018 I think he meant set it and forget it, as in no adjusting dwell or gap or replacing points as a wear item. Once the Pertronix is installed, there's no fussing with it. And no, I don't think it will work with less than a 3 ohm coil. It says right on step 4 that you can't run anything less than 3. http://www.pertronix.com/docs/instruction-sheets/1181.pdf ..yes it will, my coil is 1.5 ohms and ballast resistor is 1.5, 3 ohms tri. Quote Link to comment
distributorguy Posted January 30, 2018 Report Share Posted January 30, 2018 Semantics RacerX. You're running 3 Ohms. If you guys would just read the 1 page Pertronix instructions, its all laid out. With a diagram even. If you cobble a single point Pertronix into a dual point Datsun distributor, you will need to drill mounting holes. Where do you put them? It matters!!! Rotor phasing is key!!! Again, if you do find a distributor in a Cardone box, run away from it as fast as you can! You're better off cleaning up a used one on your own. If the auto parts store is making money on a $47 distributor, what exactly do you think you're buying? A $50 unadulterated dirty core will be a better distributor!!! Quote Link to comment
mainer311 Posted January 30, 2018 Author Report Share Posted January 30, 2018 Drilling the holes in a random location doesn't scare me. You can always cut a new intermediate plate that reindexes the dizzy to whatever location you want. It's not rocket science. Then again 1.5 and 1.5 isn't 3, apparently. Quote Link to comment
racerx Posted January 30, 2018 Report Share Posted January 30, 2018 maybe I got lucky with my single distributor (cardone) that I got from Oreillys, been running good for 10 years. Quote Link to comment
datzenmike Posted January 30, 2018 Report Share Posted January 30, 2018 If only gain is loosing points then go to junk yard and get an EI dizzy and matching coil. 1 Quote Link to comment
Crashtd420 Posted January 30, 2018 Report Share Posted January 30, 2018 We don't have the luxury of going to the junkyard to find our parts up here in mass.. Quote Link to comment
d.p Posted January 30, 2018 Report Share Posted January 30, 2018 Man these threads are always the best! Quote Link to comment
banzai510(hainz) Posted January 30, 2018 Report Share Posted January 30, 2018 Pertronix is just a point replacement stock 510 coil is 1.6 and ballast is 1.6 =3.2 ohms close enuff. to 3 ohms. I run a SUPERCOIL which is .7 ohms and I tthink in the kit came a .85 ohm ballast and I routed in series with the stock 1.6 ohm ballast in series. close to 3 ohms also don't have to be exact, close to 4 amps good or slightly less. running a low value coil and not ballast may pop the module. this was done on Unilite conversions also. the modules would pop. I never had a issue(Pertronix as I have spare single points dizzys to use up (didn't want to throw away) Ive gone threw like 2 or 3 just plain worn out. Pertronix is fine 1st and 2nd Gen electronic is good if you have them also. Quote Link to comment
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