1998 Riv
Expert
Name : Dave
Age : 64
Location : In The AZ Oven
Joined : 2007-01-17
Post Count : 4502
Merit : 44
 | | Subject: backcutting & filing plugs Fri Sep 21, 2007 1:53 pm | |
| Anyone play around with this plug mod?
www.performanceunlimited.com/documents/plugsidegapping.html | |
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AA
Administrator
Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
Merit : 252
| | Subject: Re: backcutting & filing plugs Fri Sep 21, 2007 2:13 pm | |
| I have never tried this. Instead, I gap my plugs wider than recommended, around .058", to make longer spark paths. To my knowledge, our coils make sufficient voltage to jump larger distances without being "blown out" by boost.
Not saying the idea wouldn't work, but imo if you plan to open the electrodes to the combustion chamber, it would be necessary to aim the open side toward the center. This means indexing would be required, which would be a pain in the ass on the rear bank. Even more so because the electrode wear issue requires you to check/change plugs twice as often as with normal plugs. _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^  '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
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1998 Riv
Expert
Name : Dave
Age : 64
Location : In The AZ Oven
Joined : 2007-01-17
Post Count : 4502
Merit : 44
| | Subject: Re: backcutting & filing plugs Fri Sep 21, 2007 2:53 pm | |
| Exactly my thoughts. Indexing is not worth the effort for most of us, and the likely shorter plug life is a drawback in a DD that sees 12k/year. | |
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| | Subject: Re: backcutting & filing plugs | |
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