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Plug gap ??

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Old Feb 17, 2011 | 04:21 PM
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Default Plug gap ??
What should I gap my plugs to

Tr6 plugs
Lq4
Patriot 243 heads
Trex cam
Hp950 carb
200 shot
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Old Feb 17, 2011 | 06:52 PM
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.035 n/a


you shouldn't be running tr6 on a 200 shot, you need plugs in the 8-9 range IMO and that should be much tighter. .023-.026 for a starting point.
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Old Feb 17, 2011 | 07:40 PM
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Mine are gapped at .045 right now.
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Old Feb 17, 2011 | 07:55 PM
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Gap them .035
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Old Feb 17, 2011 | 09:27 PM
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.035 is good even without nitrous?
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Old Feb 17, 2011 | 09:44 PM
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Originally Posted by team39763
.035 is good even without nitrous?
Absolutely.
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Old Feb 17, 2011 | 10:24 PM
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I did them around 30 31 should I go back or leave them
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Old Feb 18, 2011 | 06:52 AM
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I would open them up.
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Old Feb 18, 2011 | 06:53 AM
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This is interesting. Most of the EFI guys say they are running gaps from .045" to .055".
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Old Feb 18, 2011 | 06:58 AM
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And you see the carbs going .035, so i settled in the middle at .045, LOL.
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Old Feb 18, 2011 | 09:29 AM
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I've read in a few places that as long as your ignition is strong enough to handle it, you want to run the bigger gap. And like was just mentioned, the efi guys seem to be running big gaps like .055 and around there. I'll try the small gap on my next plug swap.
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Old Feb 18, 2011 | 01:17 PM
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Exactly, thats why i dont want to run a gap smaller than .045.
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Old Feb 18, 2011 | 01:21 PM
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Might be interesting to see what MSD says.
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Old Feb 18, 2011 | 02:28 PM
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I've always ran .040
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Old Feb 18, 2011 | 03:19 PM
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I just spoke to MSD tech and they said that it is related to the compression ratio. He said for 10:1 compression he recommends .040" to .045". As the compression goes up, tighten it up. For example: he said if you hit 11+:1 compression you might go .035". He did indicate that this was not a specific stead fast rule but he did say never go over .060".
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Old Feb 18, 2011 | 05:39 PM
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Sweet, i am spot on then.
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Old Feb 19, 2011 | 05:51 AM
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I run .030 on my carb setup.I opened the gap up one time on spray lets just say it didnt like it thats all.
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Old Feb 19, 2011 | 10:37 AM
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for the guys running wide gaps: if you start having high rpm miss-fire problems, then start tightening the gap.
As cylinder pressure goes up, the resistance across the plug gap goes up, and the ignition has a more difficult time to fire the plug.
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Old Feb 19, 2011 | 03:07 PM
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Originally Posted by 3pedals
for the guys running wide gaps: if you start having high rpm miss-fire problems, then start tightening the gap.
As cylinder pressure goes up, the resistance across the plug gap goes up, and the ignition has a more difficult time to fire the plug.
Thats what mine was doing so i closed the gap back up
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