TR-6 vs TR-55 NGK
I got 8 plugs from Pep-boys , they are NGK TR-6, these are one colder then stock.($2.29 each) Some people said with my mods, I should not have to go to one colder and it would make my car run richer. Currently I am perfect 14.7 stoeic.... with my mods is it ok, beneficial, nuetral or detrimental - what is others opinion?
Last edited by AVIDMOTION; 02-12-2012 at 06:35 PM.
SOLD 5/16 BOUGHT 2013 PP SHO...2009 GT 0-60 4.1,RWHP 381@4765,TQ 416.11@3828= 12.58@109.78 KOOKs 1 7/8 /race CATS, VARARAM & HSRK RESONATOR DELETE/3 INCH X PIPE to MAGNAFLOW SS F:Michilin pilot A/S3, R: Cooper Zeon RS3, VCM Ecm/TCM tune by Troy, Russell SS brake lines, hawk hps/ DBA 4000XS, NGK TR-5, YellaTerra 1.85Rockers PAC 1218, CC 7.450 Pro Magnum Rods, FULL BMR poly Rear/DIFF White BUSHINGS,BMR trailing arms/toe rods.FE3 shock/struts, Billet Catch Can, LOVELL's strut mounts/BMR bushing,UDP Ported&PolishTB,red Alto,CircleD 3000
The TR55 should be a Iridium which is a better, longer lasting plug. I would say your true estimated HP if your sig is correct is probably 360-370 so there would not be a need to go 1 step colder. A TR55 is about a 1/2 step colder and would be perfect. Make sure to gap them correctly.
The computer will keep your AF 14.7 regardless with your mods. You would want to look at ST/LT fuel trims if anything.
2008 Liquid Red Pontiac G8 Sport/Premium - Adams Polishes - American Racing Headers - ARP - BMR Fabrication - Circle D Specialties - COMP Cams - Crazy Paul - Dynojet - Earl's - Flowmaster - Fuel Air Spark Technology - G2 - GFORCE 1320 - Greg Weld - HP Tuners - JBA - Lingenfelter - Maverick Man Carbon - Metco Motorsports Solutions - Mickey Thompson - M&H - Mike Norris Motorsports - NGK - Pace Performance - Pedders USA - Powerbond - PSI - Russell - SBX Performance - SJM Manufacturing - SPOHN Performance - Tony Mamo - Vararam - Vector Motorsports - Wretched Motorsports - 470 RWHP 427 TQ - Engine Tune By Patrick G
http://www.ngksparkplugs.com/tech_su...k_plugs/p2.asp
I think I see why I ended up w/ a plug one range colder... ignition timing changes, 10% ethanol content in fuel, safety factor for stop & go driving in Texas heat, etc.
Last edited by johnbell2; 02-12-2012 at 08:15 PM.
2009.5 MSM/Onyx G8 GT premium/sport/sunroof
Wrenched and tuned by Reckart Performance Tuning in Cedar Park, TX USA
"A TR55 is about a 1/2 step colder " 100% wrong. NGK does not do 1/2 ranges. the TR5 and TR55 are the same heat range BUT the TR55 has a wider gap, .060". They are commonly used in the 3800 vehicles that require a wider gap.
Trying to close the gap on a TR55 to .040" is a big mistake. You get too much overhang over the electrode. Spoils the design of the plug.
'09 GT SRM Cortex tuner, Solo HFC, VCM Intake,Spohn Trailing Arms & Toe Links
Correct on the .060 gap, but it IS about 1/2 a range colder then a factory plug. Not going by a cross reference chart. I guess you have never cut a plug back to expose an electrode. But what would I know...
2008 Liquid Red Pontiac G8 Sport/Premium - Adams Polishes - American Racing Headers - ARP - BMR Fabrication - Circle D Specialties - COMP Cams - Crazy Paul - Dynojet - Earl's - Flowmaster - Fuel Air Spark Technology - G2 - GFORCE 1320 - Greg Weld - HP Tuners - JBA - Lingenfelter - Maverick Man Carbon - Metco Motorsports Solutions - Mickey Thompson - M&H - Mike Norris Motorsports - NGK - Pace Performance - Pedders USA - Powerbond - PSI - Russell - SBX Performance - SJM Manufacturing - SPOHN Performance - Tony Mamo - Vararam - Vector Motorsports - Wretched Motorsports - 470 RWHP 427 TQ - Engine Tune By Patrick G
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