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Thread: spark plug choice for boost?
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05-05-2011, 06:59 AM #1Senior Member
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Red- Vette,240sx,ls1 camaro
spark plug choice for boost?
I'm fixing to start tuning on my turbo motor, I currently have an autolight racing plug ar-472 which is the coldest plug they make in it. But it doesn't seem to like them very well, its already killed a set of plugs (2-4hrs run time) it was on the rich side at first but I've about got it leaned out enough now. I have read the ngk-tr6's is a good starting point? Just wanna confirm with my setup.
5.3 iron block punched to 5.7 with all forged internals
9:1:1 compression
60-1 precision turbo, starting out @ 5psi but will tune for 20-25psi
Water intercooler
Blow through carb
Msd 10mm wires
Stock ls truck coils
93 octain pump gas
Also curious between platinum and irid plugs
This is also a street driven car so I want a plug its not going to kill everytime I get on the 2step or transbrake.
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05-05-2011, 01:16 PM #2;)
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Black/Screaming Yellow- 99 S/C TA WS6 & 04 Cobra
NGK TR-6's for up to 12 psi. After that then go two steps colder with the NGK TR-7's.
1999 Trans Am WS6 Black - Forged 346, P1SC (8psi), TH-400, and 12 bolt(3.73's)
10.29@129 w/1.60 sixty foot
2004 Screaming Yellow Mustang Cobra - Whipple 2.3, Exhaust, & CCW's...My DD
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05-06-2011, 02:57 AM #3Senior Member
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Red- Vette,240sx,ls1 camaro
Would you happen to have the part # for the tr-7's? My local parts store couldn't get a cross.
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05-06-2011, 04:30 AM #4;)
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Black/Screaming Yellow- 99 S/C TA WS6 & 04 Cobra
Originally Posted by Sleeper101
BP7EFS stock number 3526 at Advance Auto. $1.98 each...there is no "TR7"...but this would be it if they kept the TR designation.
http://ngksparkplugs.com/images/pdfs/product_list.pdfLast edited by Packy; 05-06-2011 at 04:33 AM.
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05-06-2011, 06:35 AM #5Senior Member
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Red- Vette,240sx,ls1 camaro
Thanks man. I'm gonna get a set of each on the way.
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05-08-2011, 01:58 PM #6Senior Member
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White- '10 ZR1
good info
What's the recommended gap? I used to know.....
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05-09-2011, 04:15 AM #7Senior Member
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Red- Vette,240sx,ls1 camaro
Most run between .035 and .038
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05-13-2011, 11:24 AM #8;)
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Black/Screaming Yellow- 99 S/C TA WS6 & 04 Cobra
I do mine at .032 to .035
They always seem to grow a bit over time. The last set I pulled out were around .038-.040
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05-15-2011, 05:05 PM #9Member
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Black- 2000 SS
TR7 at .35
1967 Camaro - LS1 T56 project
2003 Z06 - Procharged and LTs
2001 Honda Civic EX - DD
2005 Kawaski KFX400
2000 Camaro SS m6 - 523rwhp 468rwtq - (Sold)
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