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post #1 of (permalink) Old 11-28-2001, 07:03 AM Thread Starter
 
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TR ignition question...

I did the upgrade, and was mildly impressed. I didn't do the distributor advance, as I was told that the part was not available anymore. I DID use a cheap set of cap/rotor parts. I've got a good one now, but my question concerns the plug gap. I read on another post that the gap should NOT be changed from factory. (.035) I gapped mine at .045 or .050 I believe. Is this too much?
Thanks.

BillR
'86 CJ-7, 360, 727, OEM Dana 44, locked and loaded!
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post #2 of (permalink) Old 11-28-2001, 08:33 AM
Little_W
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Re: TR ignition question...

YUP! 2big. Why'd you open them that much?
w

post #3 of (permalink) Old 11-28-2001, 08:58 AM Thread Starter
 
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Re: TR ignition question...

That's what I thought the original instructions said to do. Because the coil is hotter, you could go bigger on the gap.
No?

BillR
'86 CJ-7, 360, 727, OEM Dana 44, locked and loaded!
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post #4 of (permalink) Old 11-28-2001, 09:12 AM
 
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Re: TR ignition question...

I did the TR conversion over a year ago and it works great. If you changed to the TFI coil you should run .045.

My Jeep is a work in progress, Happy Trails
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post #5 of (permalink) Old 11-28-2001, 09:54 AM
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Re: TR ignition question...

So what happens if you don't enlarge the gap to .045?

post #6 of (permalink) Old 11-28-2001, 11:07 AM Thread Starter
 
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Re: TR ignition question...

I'll let you know tonight. I'm changing the plugs today anyway.

BillR
'86 CJ-7, 360, 727, OEM Dana 44, locked and loaded!
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post #7 of (permalink) Old 11-28-2001, 11:50 AM
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Re: TR ignition question...

These are my rules of thumb,
.035 stock or with just TR cap, rotor,and wires
.045 if you also install TFI coil
.050-.055 if you also install an MSD 6
Nothing bad happens if you don't go wide enough, you just do use the full potential of your ignition.
Just don't go wider if you don't do the upgrades cause the spark might not be able to jump the gap.
I'm still curious as to what TR would say.

CTjeepnut

Funny thing is, the more I practice, the luckier I get.
post #8 of (permalink) Old 11-28-2001, 09:20 PM
 
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Re: TR ignition question...

Is this like that E.F. Hutton commercial?
(MY Ignition geek is TeamRush, and TeamRush says.... )
----------------

I say...
If you enlarge the cap, you spread the terminals farther apart, so there is less chance of cross firing to the wrong terminal.
If you just do the cap, rotor, and plug wires, open up to about 0.040" to 0.045".
If you do the cap, rotor, wires, and E-core (TFI Style) coil, you should be able to handle 0.045" easy.

This depends on the quality of the cap, rotor, plug wires and coil you upgrade to...
IF you use premium brass terminal cap, and rotor, and a good set of helical wound plug wires, you should be able to do 0.045" with no problem at all.
IF you use "Ernie's Discount Bargain Basement" aluminum terminal crap and plug wires from China made from old Holiday Inn lamp cords, you probably are going to have problems no matter what plug gap you run.

If you do the rotor, distributor cap, plug wires, ignition coil, and advance springs (Mr. Gasket P/N 925D, $3 from http://www.summitracing.com ) then you are ready for the MSD 6 series capacitive discharge module.
(MSD finds and kills cheap parts in short order! Better use the good stuff!)

With MSD you can go over 0.060", but I've not found any gains in going over 0.060" and for street use, about 0.050" is as large as you want to go.
Glad to see a few were listening....

So many cats, so few recipes...
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post #9 of (permalink) Old 11-28-2001, 09:21 PM Thread Starter
 
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Re: TR ignition question...

I replaced the plugs tonight and gapped them at .040, and it seems to run fine. I also put on a high-end cap and rotor set. THAT made a difference!

BillR
'86 CJ-7, 360, 727, OEM Dana 44, locked and loaded!
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