what the best spark plug ? 18 psi

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Aug 3, 2010 | 10:29 AM

#21

LS1RedZ

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From: Waco, TX

Where can you get the TR7s? I looked for them and nobody had them anywhere.

Aug 3, 2010 | 02:37 PM

#22

98Z28CobraKiller

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From: WPB, FL

As long as you aren't rich at idle, it's fine.

Aug 3, 2010 | 03:04 PM

#23

KILLER-LS1

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Read this on heat ranges: http://www.ngksparkplugs.com/tech_su...2.asp?mode=nml

Aug 3, 2010 | 03:07 PM

#24

KILLER-LS1

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http://www.youtube.com/watch?v=LbR75...layer_embedded

Aug 3, 2010 | 05:03 PM

#25

HydroStream6

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From: Rochester, NY

TR7s technically don't exist. Look for 3346 or BR7EF NGK

Oct 21, 2010 | 08:06 AM

#26

turbo370supra

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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?

Oct 21, 2010 | 10:20 AM

#27

Phil99vette

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From: Port Tobacco, MD

These are very nice plugs at your power level.
http://sparkplugs.com/more_info.asp?AAIA=&pid=7908

Oct 21, 2010 | 04:24 PM

#28

98Z28CobraKiller

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From: WPB, FL

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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Oct 21, 2010 | 05:20 PM

#29

tomz28

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From: Saline, MI

Quote:

Originally Posted by 98Z28CobraKiller

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

Oct 21, 2010 | 08:56 PM

#30

turbo370supra

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i have trickflow cnc 225s. so phill will thoes 3911's go right in? tamperd seat or gasketed?

Oct 21, 2010 | 09:05 PM

#31

Phil99vette

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From: Port Tobacco, MD

Quote:

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.

Oct 21, 2010 | 09:13 PM

#32

turbo370supra

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the 3911s compare to what on the ngk scale?

Oct 28, 2010 | 10:29 AM

#33

stangeater01

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From: New Orleans

what gap are you running on the 3911s s85 370cid in the neighborhood of 1k hp

Oct 28, 2010 | 02:57 PM

#34

Johnv

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From: New Zealand

TR8s here @ 25 thou gap

Oct 29, 2010 | 08:56 AM

#35

Phil99vette

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From: Port Tobacco, MD

start at 22-24 thou

Feb 21, 2011 | 07:37 PM

#36

Swerve7rpm2000

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From: Bossier City, Lousiana

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

Feb 21, 2011 | 09:21 PM

#37

AFASTYZFR1

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From: Florida

I run BR7EF

Feb 22, 2011 | 12:10 AM

#38

cracker

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From: ATX©

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.

Feb 22, 2011 | 12:11 AM

#39

cracker

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From: ATX©

Quote:

Originally Posted by AFASTYZFR1

I run BR7EF

Thank the non existent god you didn't call them TR7's!!!

Feb 22, 2011 | 08:17 AM

#40

Phil99vette

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From: Port Tobacco, MD

Quote:

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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