aftermarket spark plugs - Pontiac GTO Forum
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post #1 of 14 (permalink) Old 01-11-2006, 01:27 PM Thread Starter
 
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aftermarket spark plugs

hey everyone i'm just curious what kind of spark plugs everyone is runnin and if you saw much of a change with them.
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post #2 of 14 (permalink) Old 01-11-2006, 01:36 PM
 
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hey everyone i'm just curious what kind of spark plugs everyone is runnin and if you saw much of a change with them.
NGK TR55s and MSD 10mm wires, swapped out at 50k miles.

Can't say I've noticed any difference....just a maintenance thang.
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post #3 of 14 (permalink) Old 01-11-2006, 06:48 PM
 
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I was talking to a guy at a speed shop about this. He said do you think GM would spend the $10 a plug that it costs for iridium plugs if there wasn't a benefit over the $3 copper plugs. The extra cost to GM for those plugs for just the 2005 GTO is $672,000. For the C6 it is $2,128,000 for plugs for just the 2005 model year. He did add that if you radically changed the engine, heads, cam etc... there would probably be a better plug. If you use nitrous there definately is better plugs.
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post #4 of 14 (permalink) Old 01-12-2006, 11:47 AM
 
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Originally Posted by Groucho
NGK TR55s and MSD 10mm wires, swapped out at 50k miles.

Can't say I've noticed any difference....just a maintenance thang.
I did notice a difference on the @ss dyno. quicker lift of front. better throttle response. I put the TR55's and Taylor 10mm's
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post #5 of 14 (permalink) Old 01-12-2006, 12:08 PM
 
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Originally Posted by westell
I did notice a difference on the @ss dyno. quicker lift of front. better throttle response. I put the TR55's and Taylor 10mm's
You maybe right-- I haven't really noticed a big enough difference to say- "Woah."

And I don't want to know how one goes about calibrating a butt dyno, thenk yew veddy much.
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post #6 of 14 (permalink) Old 01-13-2006, 02:50 PM Thread Starter
 
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so our goats have iridium plugs from the factory is that what your sayin ferg?
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post #7 of 14 (permalink) Old 01-13-2006, 06:34 PM
 
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so our goats have iridium plugs from the factory is that what your sayin ferg?
Yes they are iridium.
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post #8 of 14 (permalink) Old 01-18-2006, 11:42 AM Thread Starter
 
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thanks for the input guys i put new long tube headers on yesterday and since it is a royal PIA to change the plugs after headers are installed i put some TR55's in. man i like the way she runs and sounds. time for a dyno.
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post #9 of 14 (permalink) Old 01-05-2009, 04:06 PM
 
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Where can I get the TR55's?
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post #10 of 14 (permalink) Old 01-05-2009, 04:16 PM
 
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ANY major auto parts store.
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