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Old 06-12-2012, 12:27 PM
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Are these plugs OK to run in a carburated ls1 with a 125shot
Old 06-12-2012, 01:01 PM
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Autolites are ok plugs but I would use NGK br6ef or maybe a step colder to be safe br7ef
Old 06-12-2012, 02:39 PM
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OK thanks
Old 06-12-2012, 07:59 PM
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I made the mistake of buying these my first ever plug purchase for nitrous because they cross referenced to a NGK BR7EF.

Turns out they are projected tip.

Use a BR7EF for your 125 shot. What is the compression though?
Old 06-12-2012, 08:23 PM
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11.5 comp.
Old 06-13-2012, 05:48 PM
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I ran these plugs on a 150 shot for a few years. No problems
Old 06-13-2012, 07:12 PM
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I ran these with 100 shot on e85 with 26 degrees of timing, and 13.67 compression. In my ls7 car.
Old 06-13-2012, 07:23 PM
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I bought some br7ef plugs today.thanks for the info. At first I still had some auto lite 104 plugs and it burnt the strap on one with a 125shot so now I'm a little nervous.
Old 06-14-2012, 01:40 AM
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Originally Posted by richard david
I bought some br7ef plugs today.thanks for the info. At first I still had some auto lite 104 plugs and it burnt the strap on one with a 125shot so now I'm a little nervous.
You made the right choice.



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