Just trying to troubleshoot some rough running at c. 2,500 rpm and am replacing the coil in advance of Silverstone. It’s been running a Pertronix flamethrower 1.5 ohm. I have a replacement on order but not convinced it’s going to arrive before the weekend.
If I have a Lucas 3 ohm coil in the garage, will the difference in resistance cause me any issues??
Coil resistance
- Dave Woodward
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Coil resistance
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I say, ding dong!
I say, ding dong!
- StewbieC
- T289R Committee
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Re: Coil resistance
Hi Dave, higher resistance normally means less power and less spark, high ohmage coils will also run cooler (and should last longer). The only caveat is to find out if the Lucas coil requires a ballast resistor or not and you may have to take the one out you may have. They are normally wired in series with the coil. Also if you have electronic ignition you need to work out if the coil is compatible. Sorry I can't be more help.
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Stu
Hawk 289, 66 Mustang Fastback with a 289 maximum smiles per mile..
Stu
Hawk 289, 66 Mustang Fastback with a 289 maximum smiles per mile..
- Dave Woodward
- T289R Member
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Re: Coil resistance
Replacement Flamethrower has just arrived
Anybody need a 3 ohm Lucas coil
Anybody need a 3 ohm Lucas coil
__________________________________
I say, ding dong!
I say, ding dong!
- Dave Woodward
- T289R Member
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- Location: Cheshire
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Re: Coil resistance
A quick run out shows it’s still running rough between 2-3,000 rpm and surging a little on idle. It had started doing this before the engine came out. Since then, new dizzy cap, new leads and new coil.
What’s next? Any thought?
What’s next? Any thought?
__________________________________
I say, ding dong!
I say, ding dong!
Re: Coil resistance
Fuel system? I don't know what products are on the market nowadays, but the likes of Redex or similar carb cleaner run through the carb intake might clean the jets without having to do a strip down.
Cheers, Clive.
(If I'm not here I'm in my workshop or on the golf course!)
(If I'm not here I'm in my workshop or on the golf course!)
- Dave Woodward
- T289R Member
- Posts: 918
- Joined: Sun May 06, 2007 10:00 pm
- Location: Cheshire
- Contact:
Re: Coil resistance
After all that, it was the timing that has too much advance. All fixed now.
__________________________________
I say, ding dong!
I say, ding dong!
Re: Coil resistance
Glad to hear it's OK. I am surprised that it was the timing unless it has always been problematic.
Cheers, Clive.
(If I'm not here I'm in my workshop or on the golf course!)
(If I'm not here I'm in my workshop or on the golf course!)