Spark plug gap effect on performance.
- Thread starter PANDA
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For some reason anytime my GTP starts to run like garbage it's been ignition related. Plugs, wires, boots, coil pack terminals, etc.
Thats what I thought, and was looking for a problem for the last two years, then 10 minutes idling in James's drive way with the new exhaust, and we discovered my burned exhaust valve
....... And less gap will lower your mid range power a bit(smaller starting flame kernel), but we are talking small amounts here, the only big gain of lowering gap is if you are having spark blow-out, or KR issues (having the ground strap closer to the plug and head moves it all little more out of where it can ignite the fuel....in theory)But Give James a minute, I'm sure he will give you a better answer than mine
just be thankfull they got rid of the magnavox ignitions
closing your plug gap decreases the resistance and reduces the firing voltage (not as hot/intense of a spark), not to mention the spark kernel is shrouded more.
you do want the biggest gap possible without spark blowout. if anything you can cut off 1/8th of an inch off the end of the groundstrap and sidegap it
closing your plug gap decreases the resistance and reduces the firing voltage (not as hot/intense of a spark), not to mention the spark kernel is shrouded more.
you do want the biggest gap possible without spark blowout. if anything you can cut off 1/8th of an inch off the end of the groundstrap and sidegap it
Thanks for the input.
btw you are NOT a member of Double D Racing.
Trims look the same although this morning WOT locked in at +2. I can probably blame this on the huge flux in temperatures over the last few days though.
Yea, I try to change the plugs often, its cheap and easy.
Thats what I thought, and was looking for a problem for the last two years, then 10 minutes idling in James's drive way with the new exhaust, and we discovered my burned exhaust valve
But Give James a minute, I'm sure he will give you a better answer than mine
How did u find burnt exhaust valve?
I do believe I am getting a decrease in power after this plug change. I don't think it could be the oil change and the airfilter I did at the same time. Tune is unchanged. I cant get this car to knock, whats spark blowout?
I think im going to gap the plugs at .060 and see if any difference in power/KR. Where can I buy a GOOD plug gap tool, not these circle ricerzone things.
Exhaust valve: Sucktion in the exhaust system, means the one or more exhaust valve is not seating properly and the intake stroke is sucking back in from the exhaust
Spark blow-out is where the gap is too big, so you have a cooler spark, and the airflow in the cylinder is enough to keep the fuel from igniting, sometimes it can even increase the resistance enough to prevent the spark from happening
Go to a hardware store and buy a set of "Feeler" Gauges, they are 2 - 3 inch pieces of steel usually in a set, and they are exact thicknesses, use them to measure the gap, and your fingers/pliers to move the ground strap
I use my feeler gauge for plug gap.
I'm DD approved bitch.Says me. u think u can just add that to your sig.
keep this BS out of my thread
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