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post #1 of (permalink) Old 12-03-2002, 10:43 AM Thread Starter
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TR Upgrade Coil

I have done the basic upgrade including the coil. Everyone calls it a TFI coil, I thought TFI referred to the module on the newer Ford distributors. Anyway I am reading 9 volts at idle at the coil and voltage increases with RPM's. Is this right? The engines lights right up alot quicker and seems to run smoother.
I double checked the connections so thats not it.
Also do I need to regap my plugs??
I have searched for info with no luck any help would be great. [img]images/graemlins/confused.gif[/img]
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post #2 of (permalink) Old 12-03-2002, 11:25 AM
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Re: TR Upgrade Coil

That sounds about right. The inline resistor (ballast resistor) knocks the voltage down so the coil doesn't fry.
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post #3 of (permalink) Old 12-03-2002, 11:27 AM
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Re: TR Upgrade Coil

Humm... it seems OK.

As to the rise in voltage... confim that the battery voltage rises with increased revs. The battery charge voltage should not go over about 13.7 volts at highe revs.
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post #4 of (permalink) Old 12-03-2002, 12:38 PM Thread Starter
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Re: TR Upgrade Coil

Right now the battery voltage is about 14.2 -14.3 at idle. That seems high. usally I have seen about 12 at idle and 13or 14 at higher rpm's on my previous vehicles. Any Thoughts?
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post #5 of (permalink) Old 12-03-2002, 12:48 PM
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Re: TR Upgrade Coil

That is high for idle. What happens when you rev the engine?

I'd be suspicious of two things:

1. A battery constantly in need of charge.
2. A bad voltage regulator.
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post #6 of (permalink) Old 12-03-2002, 01:05 PM
 
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Re: TR Upgrade Coil

</font><blockquote><font class="small">In reply to:</font><hr />
Right now the battery voltage is about 14.2 -14.3 at idle.

[/ QUOTE ]

What happens when you rev the engine? The alternator is supposed to put out about 14.2 volts, but often times it drops down to 12.5-13 or so at idle. Measuring the voltage at several RPM's will tell the story. If it goes up to 15-16 pr higher when you rev the engine, the regulator is toast. If it stays at 14.2, you're fine.
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post #7 of (permalink) Old 12-05-2002, 06:57 AM Thread Starter
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Re: TR Upgrade Coil

So now do I have to regap my plugs to .045 or should I leave them at .038? [img]images/graemlins/confused.gif[/img] [img]images/graemlins/confused.gif[/img]
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post #8 of (permalink) Old 12-05-2002, 03:48 PM
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Re: TR Upgrade Coil

I don't think you have to re gap your plugs, but it wouldn't hurt. I believe the reason you regap them is because now with the better coil, you have more available voltage to jump a larger gap which means a hotter spark that will more readily ignite what is in the combstion chamber. I plan on seting mine around .042-.045 as soon as I'm done mounting the coil and fixing my module I just burned up.
post #9 of (permalink) Old 12-06-2002, 12:24 AM
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Re: TR Upgrade Coil

IMHO... open it up to .045 after the TR upgrade. [img]images/graemlins/grin.gif[/img]
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post #10 of (permalink) Old 12-06-2002, 03:34 AM Thread Starter
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Re: TR Upgrade Coil

Thanks Guys for all yo [img]images/graemlins/cool.gif[/img] [img]images/graemlins/smile.gif[/img]ur help
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