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what the best spark plug ? 18 psi

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Old 08-03-2010, 10:29 AM
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Where can you get the TR7s? I looked for them and nobody had them anywhere.
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Old 08-03-2010, 02:37 PM
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As long as you aren't rich at idle, it's fine.
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Old 08-03-2010, 03:04 PM
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Read this on heat ranges: http://www.ngksparkplugs.com/tech_su...2.asp?mode=nml
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Old 08-03-2010, 03:07 PM
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http://www.youtube.com/watch?v=LbR75...layer_embedded
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Old 08-03-2010, 05:03 PM
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TR7s technically don't exist. Look for 3346 or BR7EF NGK
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Old 10-21-2010, 08:06 AM
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some smart turbo guys in here.
1100 ish to the flywheel. im using gas with meth injection. 19-22 psi. go with 7s? or 8s?
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Old 10-21-2010, 10:20 AM
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These are very nice plugs at your power level.
http://sparkplugs.com/more_info.asp?AAIA=&pid=7908
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Old 10-21-2010, 04:24 PM
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Also, make sure to get the correct plug for your specific head. Some heads require a gasketed plug while others just have a tappered seat. My AFR heads use a tappered plug. We just found out that the TFS heads should be running a gasketed plug but have been running a tappered plug in them all this time. DOH.
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Old 10-21-2010, 05:20 PM
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Originally Posted by 98Z28CobraKiller
Also, make sure to get the correct plug for your specific head. Some heads require a gasketed plug while others just have a tappered seat. My AFR heads use a tappered plug. We just found out that the TFS heads should be running a gasketed plug but have been running a tappered plug in them all this time. DOH.
well thats good to know im about to change my plugs out. let me know what the part numbers are ill be looking for some in the 7 range thanks
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Old 10-21-2010, 08:56 PM
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i have trickflow cnc 225s. so phill will thoes 3911's go right in? tamperd seat or gasketed?
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Old 10-21-2010, 09:05 PM
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Originally Posted by turbo370supra
i have trickflow cnc 225s. so phill will thoes 3911's go right in? tamperd seat or gasketed?
The part number I listed will work fine in that application. We had good luck with the AR3911s before we started turning the boost up. They ran fine in our 7.6 second passes years ago. Since then we have changed plugs but for a 8.0 to 9.5:1 and under 25# of boost they should work well.
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Old 10-21-2010, 09:13 PM
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the 3911s compare to what on the ngk scale?
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Old 10-28-2010, 10:29 AM
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what gap are you running on the 3911s s85 370cid in the neighborhood of 1k hp
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Old 10-28-2010, 02:57 PM
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TR8s here @ 25 thou gap
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Old 10-29-2010, 08:56 AM
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start at 22-24 thou
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Old 02-21-2011, 07:37 PM
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Hey Phil can i get your opinion on some spark plugs.... i have a set of 225 tfs heads 408 pt88 prolly run a max of 15 psi to start off with, AR3911s? and what kinda gap .25 to be safe? thanks
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Old 02-21-2011, 09:21 PM
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I run BR7EF
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Old 02-22-2011, 12:10 AM
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Are you guys on crack? What is the part number for a TR7 ore a TR8??

Just curious.

The only TR part number worth talking about is a TR6. And as stated before, stock motor, decent shot plugs. If you want to go colder, go with BR7EF. THESE ARE NOT TR7's

tr7's and tr8's do not exist, except in the iridium line. I don't know if they even make those anymore.
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Old 02-22-2011, 12:11 AM
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Originally Posted by AFASTYZFR1
I run BR7EF


Thank the non existent god you didn't call them TR7's!!!
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Old 02-22-2011, 08:17 AM
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Originally Posted by Swerve7rpm2000
Hey Phil can i get your opinion on some spark plugs.... i have a set of 225 tfs heads 408 pt88 prolly run a max of 15 psi to start off with, AR3911s? and what kinda gap .25 to be safe? thanks
You'll be safe with that setup.
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