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Electronic Ignition
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- 10+ Years
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Electronic Ignition
Hello to all
Any information as to pros & cons on the electronic ignition for the Cubs?
Thinking about installing this to get the extra power for the hills on the farm. Does this actually add an additionl 8 to 15% power?
Seems easy enough to install but as always research,research,research!!!!!
Any information as to pros & cons on the electronic ignition for the Cubs?
Thinking about installing this to get the extra power for the hills on the farm. Does this actually add an additionl 8 to 15% power?
Seems easy enough to install but as always research,research,research!!!!!
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Re: Electronic Ignition
Yes it does increase hp. My loboy starts easier and runs much smoother than before. I will be installing another one on my 71 model soon.
I got mine from Brillman in Virginia for around 80 bucks. Good investment.
I got mine from Brillman in Virginia for around 80 bucks. Good investment.
"I ain't believing this!"
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Re: Electronic Ignition
Electronic ignition has been discussed several times on this board. Search function.
If you install an electronic ignition, save all of your points ignition parts. You will need them, when/if, the electronic ignition fails.
If you install an electronic ignition, save all of your points ignition parts. You will need them, when/if, the electronic ignition fails.
I have an excuse. CRS.
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Re: Electronic Ignition
Tezell wrote:Yes it does increase hp. My loboy starts easier and runs much smoother than before. I will be installing another one on my 71 model soon.
I got mine from Brillman in Virginia for around 80 bucks. Good investment.
Sounds good. The one I was looking at is $112.00
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Re: Electronic Ignition
Just remember to re-gapp the plugs to .035 for best performance. You should not expect quite that much power gain, 3 to 5 would be more realistic. But they run and start better. Bill. wlm cub
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Re: Electronic Ignition
$112 Vs. >$20 OEM? what am I missing?
Best,
Mike
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Mike
Tractors are made to work!
"A Cub will do as much as a team of horses,.. More in hot weather!" - C. W. Spradlin 1909-1994
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Re: Electronic Ignition
Assuming that Bill's 3% to 5% gain is correct. For easy math let's assume 10 hp on the draw bar with an engine in excellent condition.WLM Cub wrote:You should not expect quite that much power gain, 3 to 5 would be more realistic.
10 X .03 = 3/10th hp increase at the engine, bit less on the draw bar. 10 x .05 = 1/2 hp increase at the engine, bit less on the draw bar. A full tune up will increase engine performance.
If it's horse power and not torque you want, increase the engine's RPMs and get a bit more horse power.
I have an excuse. CRS.
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Re: Electronic Ignition
WLM Cub wrote:Just remember to re-gapp the plugs to .035 for best performance. You should not expect quite that much power gain, 3 to 5 would be more realistic. But they run and start better. Bill. wlm cub
Really , didn't read that in the instructions (or missed it), but makes perfect sense. I'll have to regap the plugs on both my E/I Cubs. Thanks for the heads up
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Re: Electronic Ignition
I have them in all 3 of my cubs and love it. No worry about points burning or slipping out of adjustment a bit at a time until one day I have no power or it won't start at all. Starts faster, runs smooth and with my rebuilt engines using late model parts I could tell the difference in power.
I'd highly recommend them to everyone.
Do a little more digging for better prices, the last set I got for around $80 at www.carshopinc.com
I'd highly recommend them to everyone.
Do a little more digging for better prices, the last set I got for around $80 at www.carshopinc.com
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Re: Electronic Ignition
Yes, shop around for a good deal, I see the price on these all over the place. I've bought several from Carshop, that's a pretty good source. On the dyno, we saw 10% improvement in both horsepower & torque, on a 184, your results may vary. I've installed several of these on Cubs and all are working very well. In the Pertronix instructions, they say you "can" increase the plug gap to .035". We didn't do that for the dyno test, we should have re-gapped the plugs & made a third pull. I don't know how much difference that will make but I suspect it will not be much. At any rate, when new plugs are installed or you remove the plugs for any reason, you might as well open the gap up.
- Bus Driver
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Re: Electronic Ignition
I suspect that IH specified .0.025 as the plug gap because of the magnetos. The 0.025 gap is easier for the low voltage spark at cranking for the magneto and stresses the magneto coil insulation less at all speeds. A magneto produces greater spark voltage as speed increases. Battery ignition produces greatest spark voltage at slow speeds. IH used lots of Delco electrics on the tractors. Chevrolets of the Cub era also used Delco and a spark plug gap of 0.035. My 12 volt conversions and the one electronic ignition conversion are run with 0.035 plug gaps.
For battery ignitions using components similar to the Cubs, wider gaps give better performance at a low speeds and smaller gaps perform better at high speed. But high speed is well beyond 4000 RPM. Cubs at full speed are really not much more than fast idle.
I cannot discern any performance difference on the 140 with electronic conversion and a well-done points tuneup. But points do deteriorate with wear and corrosion and require attention eventually.
For battery ignitions using components similar to the Cubs, wider gaps give better performance at a low speeds and smaller gaps perform better at high speed. But high speed is well beyond 4000 RPM. Cubs at full speed are really not much more than fast idle.
I cannot discern any performance difference on the 140 with electronic conversion and a well-done points tuneup. But points do deteriorate with wear and corrosion and require attention eventually.
Luck favors those who are prepared
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Re: Electronic Ignition
Ignition timing retards as the point gap decreases. Electronic ignition eliminates both sources of power loss while providing consistant spark voltage regardless of engine rpm.
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Re: Electronic Ignition
Of course we could do what Gary Dotson did; install a diesel and eliminate this problem all together.
"Courage is being scared to death-but saddling up anyway".......John Wayne
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Re: Electronic Ignition
They are available in 6v and 12v. My 6v '53 cub has the Pertronix and it runs great. I have a '69 cub that I switched over to 12v alternator charging system with the 12v pertronix and some how crossed a wire while changing out a battery. Some how it fried the pertronix. That was an $80 oops. I'd say you have to use a little more caution with them when changing out electrical components. Otherwise, it's a great conversion.
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Re: Electronic Ignition
Harold R wrote: That was an $80 oops. I'd say you have to use a little more caution with them when changing out electrical components.
True (in varying degrees) of nearly all components with solid state parts. The same oops could have easily included a one-wire alternator.
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