 Plug gaps with MSD ignition.. |
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| DougC |
 Jan 10 2006, 03:07 PM
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#1
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Senior Member  Group: Members Posts: 949 Joined: 6-July 04 From: Dallas, TX Member No.: 2,307  |
Hey guys I was wondering if I set my plug gaps correctly when I installed them in my 2.7L six. I think I gapped them .050" but I was reading somewhere that the range I could use is .050" to .060" . I also think I read somewhere that most people running MSD gap theirs to .040" which is a significant differnce it seems. So how would I benifit one way or another if I was to change the gap? Using stock coil and distributor, 6AL box.
Doug C |
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| Aaron Cox |
Jan 10 2006, 05:40 PM
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#2
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
i run a .040 with colder plugs....
with mallory coil.... |
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| J P Stein |
Jan 10 2006, 05:45 PM
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#3
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
With a stock coil and more than stock (.028) gap, you risk running out of spark at high rpms. The stock CIS dizzy doesn't have a good advance curve for carbs. Just my .02 of course. |
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| Mike D. |
Jan 10 2006, 06:45 PM
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#4
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OK, It runs now, and pretty good too! Group: Members Posts: 1,445 Joined: 3-January 03 From: Santa Clarita, Ca Member No.: 85 Region Association: None 
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I have a 2.0E engine with a 6al, msd blaster coil and a Bosch E dist. My gap is set at .045. I first set them at .050 but it just looked sooo wide. My engine runs a little rich but you would never know by looking at the plugs. That MSD really burns the gas up and keeps the plugs clean.
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| SLITS |
Jan 10 2006, 08:03 PM
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#5
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
Hotter spark = bigger gap = better flame front (bigger match to lite the mixture).
0.050 should be safe enough (I coulda said 0.048 ya know) |
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| joea9146 |
Jan 10 2006, 09:34 PM
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#6
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Senior Member Group: Members Posts: 663 Joined: 10-February 03 From: Denver, NC Member No.: 283 Region Association: None |
I run 40 with MSD and a Blaster Coil
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| john rogers |
Jan 10 2006, 10:22 PM
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#7
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
With my MSD 6 box, blaster coil and 9mm wires I use .050 with 100 octane unleaded. If I am going to Mexico or an airport circuit where I will be using 100 low lead or 110 leaded I use .055 for a slightly hotter spark along with 2 degrees more advance.
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