Spark plug gap
#3
Lead Lap
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^He's 1000% right on that! Imports are a little different than traditional domestic. I've been down both roads and flirted with bikes too. Anyways your plugs are ready to install out of the box.
Last edited by KNEXX; 12-20-08 at 12:48 PM.
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#10
Lexus Champion
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Start at .028 and if you are having misfires up top then go down a little bit. When you gap them be careful at the tip is very easy to break. I generally just lightly tap on the plug and check the gap frequently till I get it right where I want it. Use something not too heavy like a small ratchet or something. It sounds funny but that is the easiest way I have found, just be gentle but firm.
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One thing - if you're using the pregapped setup, make sure you verify they are all set the same. I've had it happen more than once when working on a car that one plug is just a bit off, and it causes funky problems. It's an easy thing to make sure they're done that way.
We had one set of 6 where the gap varied from 0.021 to 0.028. Car ran like total dog caca until we checked the plugs. Got them all gapped to 0.024, and it ran smooth as silk.
Big Mack
We had one set of 6 where the gap varied from 0.021 to 0.028. Car ran like total dog caca until we checked the plugs. Got them all gapped to 0.024, and it ran smooth as silk.
Big Mack
#14
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You should gap them down as I mentioned before, here's why:
1. The Gs obviously wasn't designed to be turbo, you are running higher compression than a standard turbo motor. Higher compression plus 8psi plus weak coils = weak spark.
2. The Gs has only 3 coils where a Supra has 6 dedicated coils. Even with 6 dedicated coils the Supra guys run .028 and lower due to high rpm missing, highway pulls are a good example of when those issues show up.
3. The plugs may be factory gapped but they aren't gapped for modified cars with increased air and fuel intake.
1. The Gs obviously wasn't designed to be turbo, you are running higher compression than a standard turbo motor. Higher compression plus 8psi plus weak coils = weak spark.
2. The Gs has only 3 coils where a Supra has 6 dedicated coils. Even with 6 dedicated coils the Supra guys run .028 and lower due to high rpm missing, highway pulls are a good example of when those issues show up.
3. The plugs may be factory gapped but they aren't gapped for modified cars with increased air and fuel intake.
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