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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 09-30-2011, 09:53 PM   #1
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At what point do you need different plugs?

So I see a several posts about NGK plugs and other brands and wondering what the benefit is over stock plugs and at what point in your mods do you need to swap the plugs. I can see it necessary for SCs and radical builds, but at what point do these come into play?
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Old 09-30-2011, 10:14 PM   #2
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NEVER. The stock plugs work just fine for well over 600whp.
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Old 09-30-2011, 10:15 PM   #3
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At the moment that the ads that one is bombarded with every time you open the paper/magazine or tv ad , that's the time you need to get them , in another words IT IS IN EVERY ONES HEAD , if it is not broken do not fix it !
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Old 09-30-2011, 10:27 PM   #4
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NEVER. The stock plugs work just fine for well over 600whp.
Ha, I'll file this one with CAIs that give you15 HP gain. Thanks figured it was not worth it.
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Old 09-30-2011, 10:42 PM   #5
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Ha, I'll file this one with CAIs that give you15 HP gain. Thanks figured it was not worth it.
That's not entirely true. There are two independently tested CAI's that have just about hit that. One is the CAI and the other is the Halltech Yellowjacket. Both hit the 13-14whp mark on their own. Add the ADM scoop to those and they gain even more than 15whp.
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Old 09-30-2011, 11:49 PM   #6
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Quote:
Originally Posted by bannonm View Post
So I see a several posts about NGK plugs and other brands and wondering what the benefit is over stock plugs and at what point in your mods do you need to swap the plugs. I can see it necessary for SCs and radical builds, but at what point do these come into play?
there may be a legitimate reason to change plugs, but the 5th gen is a bit different than the 4th gen in that there isn't really anything to be gained by switching to a different plug. Forced induction, nitrous, or some other changes could make a call for different plugs, but for many applications I would save the money rather than switch plugs.
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Old 09-30-2011, 11:57 PM   #7
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Or if the tips burn off..
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Old 10-01-2011, 04:24 AM   #8
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Or if the tips burn off..
That orange color on the plugs - octane booster?

-Mark.
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Old 10-01-2011, 07:58 AM   #9
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yes you do need different plugs for blowers/turbos
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Old 10-01-2011, 08:05 AM   #10
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Quote:
Originally Posted by axis View Post
That's not entirely true. There are two independently tested CAI's that have just about hit that. One is the CAI and the other is the Halltech Yellowjacket. Both hit the 13-14whp mark on their own. Add the ADM scoop to those and they gain even more than 15whp.
I have the CAI Inc intake, and I have Dyno sheets to show otherwise. More like 4RWHP. So unless you can provide before and after dyno sheets, I stand by my statement.
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Old 10-01-2011, 11:31 AM   #11
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Originally Posted by bannonm View Post
I have the CAI Inc intake, and I have Dyno sheets to show otherwise. More like 4RWHP. So unless you can provide before and after dyno sheets, I stand by my statement.
I believe I have seen just such a sheet on this forum someplace... Also, unless you installed the CAI at the dyno shop right after your 'before' run there is no way to know if you got a truly comparable run on each end.
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Old 10-01-2011, 11:39 AM   #12
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I believe I have seen just such a sheet on this forum someplace... Also, unless you installed the CAI at the dyno shop right after your 'before' run there is no way to know if you got a truly comparable run on each end.
Yep, there are two shown by Jannetty; 13 with just CAI, 15 with race scoop.

At C5F I ran the quarter all day bone stock. Ran 13.5-13.7 consistently. Added CAI and immediately ran 13.2. Don't think ~5hp is going to do that.
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Old 10-01-2011, 11:42 AM   #13
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Sorry to highjack thread...to the plugs...several builders/tuners on here showing stock A/C Delco doing well up to 800hp; even on some FI mods. Some have gone to stock ZR-1 plug for FI builds with success (up to 1,000hp). Guess colder plugs aren't critical, even on FI builds, unless its run that under stress/load for endurance. At the track or around town; not critical.
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Old 10-01-2011, 12:30 PM   #14
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Quote:
Originally Posted by Stingr69 View Post
That orange color on the plugs - octane booster?

-Mark.

Yes
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Old 10-01-2011, 01:04 PM   #15
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Quote:
Originally Posted by bannonm View Post
I have the CAI Inc intake, and I have Dyno sheets to show otherwise. More like 4RWHP. So unless you can provide before and after dyno sheets, I stand by my statement.
This is the Jannetty CAI shootout that was done on the same car, same day, and was broadcasted live so everyone could watch. This shows both shootouts as there were two. The bottom one was the last one and had more participants.

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Old 10-06-2011, 05:39 AM   #16
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I got mine replaced when I had headers isntalled. Speedinc recommended new plugs since the old ones had to come out to make the header install easier. They don't like to reuse them once removed just in case something happened in the process. I also got new wires installed at that time which I don't mind since they are red in color and look better. Performance wise I don't think anything changed.
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Old 10-06-2011, 07:08 AM   #17
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Differant shops have differant answers in regards to plugs, it does get confusing.
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Old 10-06-2011, 10:29 AM   #18
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The factory plug is a ac delco 41-110.. or similar... its a very good plug rated to 80,000 miles

Plugs should be checked if you notice any hesitations or issues starting

Heat ranges.... when you go up in hp 100-125 you drop a heat range to help with pre-ignition/detonation

Copper is the best conduit... but does not last as long as the iridiums.. copper plugs are cheap iridiums are not
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