Turbo owners
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Depends on what kind you're using.
My copper plugs - 3000 to 5000 miles.
My old OEM platinum plugs were still good after about 15,000 miles.
My old Denso Iridium plugs started a high rpm miss after about 6 months and I'll never used them again.
My copper plugs - 3000 to 5000 miles.
My old OEM platinum plugs were still good after about 15,000 miles.
My old Denso Iridium plugs started a high rpm miss after about 6 months and I'll never used them again.
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From: Boca Raton
Originally Posted by xviper,Mar 17 2006, 10:56 AM
Depends on what kind you're using.
My copper plugs - 3000 to 5000 miles.
My old OEM platinum plugs were still good after about 15,000 miles.
My old Denso Iridium plugs started a high rpm miss after about 6 months and I'll never used them again.
My copper plugs - 3000 to 5000 miles.
My old OEM platinum plugs were still good after about 15,000 miles.
My old Denso Iridium plugs started a high rpm miss after about 6 months and I'll never used them again.
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From: Boca Raton
Originally Posted by xviper,Mar 17 2006, 03:37 PM
Sorry, I have no idea what those plugs are. Copper? Heat range? 
NGK-R5671A-8 Plug # 4554, 14mm., 3/4" Reach, 5/8" Hex, Gasket
NICKEL ALLOY TIP
PRE-GAPPED
COPPER CORE
RESISTOR
2.6MM ELECTRODE
NGK'S exclusive 90 degree V-groove
assures a hot, clean spark for better
performance and improved mileage.
This unique V-groove design directs
the spark to the edge of the electrode
where it can develop more rapidly.
This allows easier and more complete
combustion of the air/fuel mixture.
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Those sound like copper "V-Power" plugs. I can't tell by the part # what the heat range is. If they are copper plugs, then they need to be checked every few thousand miles and possibly changed if they look bad.
PS. No plug is "Pre-gapped", especially for F.I. induction. Even for NA, you never take for granted that the gap is correct. Always check them. You should check yours. For Turbo application, the gap needs to be much narrower than for NA. Maybe your tuner knows something but at least ask to see what he gapped them at. If you put them in, then you should know what the gap is, right?
PS. No plug is "Pre-gapped", especially for F.I. induction. Even for NA, you never take for granted that the gap is correct. Always check them. You should check yours. For Turbo application, the gap needs to be much narrower than for NA. Maybe your tuner knows something but at least ask to see what he gapped them at. If you put them in, then you should know what the gap is, right?
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From: Boca Raton
Originally Posted by xviper,Mar 17 2006, 03:59 PM
Those sound like copper "V-Power" plugs. I can't tell by the part # what the heat range is. If they are copper plugs, then they need to be checked every few thousand miles and possibly changed if they look bad.
PS. No plug is "Pre-gapped", especially for F.I. induction. Even for NA, you never take for granted that the gap is correct. Always check them. You should check yours. For Turbo application, the gap needs to be much narrower than for NA. Maybe your tuner knows something but at least ask to see what he gapped them at. If you put them in, then you should know what the gap is, right?
PS. No plug is "Pre-gapped", especially for F.I. induction. Even for NA, you never take for granted that the gap is correct. Always check them. You should check yours. For Turbo application, the gap needs to be much narrower than for NA. Maybe your tuner knows something but at least ask to see what he gapped them at. If you put them in, then you should know what the gap is, right?
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Originally Posted by OGPackin,Mar 17 2006, 03:11 PM
They should be gapped to .025 if im not mistaken...
Please don't take this as gospel till the turbo people show up here.
As an example, much of the time, you are not driving the car at significant boost, WOT. In these times, the engine still needs to function sort of like NA. Another recent thread was started by someone (NA) where he discovered an aggravating ticking coming from his engine. He pulled the #4 plug and found that is was gapped around 0.025" (or less) and the tip had considerable deposits on it. After changing out the plug with one that was properly gapped, the ticking was gone.
You want a smaller gap than NA so the spark doesn't chance getting "blown out", but you don't want it so narrow that it impedes spark travel and risk getting deposits.
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From: Boca Raton
Originally Posted by xviper,Mar 17 2006, 08:07 PM
Hmmm, not sure if all turbo guys gap them that narrow. Supercharged plugs are gapped anywhere from 0.032" to 0.034".
Please don't take this as gospel till the turbo people show up here.
As an example, much of the time, you are not driving the car at significant boost, WOT. In these times, the engine still needs to function sort of like NA. Another recent thread was started by someone (NA) where he discovered an aggravating ticking coming from his engine. He pulled the #4 plug and found that is was gapped around 0.025" (or less) and the tip had considerable deposits on it. After changing out the plug with one that was properly gapped, the ticking was gone.
You want a smaller gap than NA so the spark doesn't chance getting "blown out", but you don't want it so narrow that it impedes spark travel and risk getting deposits.
Please don't take this as gospel till the turbo people show up here.
As an example, much of the time, you are not driving the car at significant boost, WOT. In these times, the engine still needs to function sort of like NA. Another recent thread was started by someone (NA) where he discovered an aggravating ticking coming from his engine. He pulled the #4 plug and found that is was gapped around 0.025" (or less) and the tip had considerable deposits on it. After changing out the plug with one that was properly gapped, the ticking was gone.
You want a smaller gap than NA so the spark doesn't chance getting "blown out", but you don't want it so narrow that it impedes spark travel and risk getting deposits.
The engine seems to be running good. No knocking or bogging, but i have noticed the same annoying ticking sound coming from my engine, so im thinking what you are saying makes perfect sense. Maybe i'll regap my plugs to .030 and see if that stops it.
Thanks for your help bro!!
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