HELP! again plis!
#1
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HELP! again plis!
ok now... the car is riding perfect, but when i step on it and hit full boost(21psi trifecta tune) some times the car just STOPS boosting.... it sound like if i let off the gas completely and im still WOT.... any idea wat could be???
#10
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Any CELs? If not there will be soon I would think.
#16
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#17
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#18
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if your running into a stumble issue, ect. with them, i'd suggest playing with the gap as you can not yet control the dwell of the packs.
in my past workings with the zex plugs, a more aggressive dwell was required to make the car and plug happy, once it was working it allowed a more aggressive timeing curve due to the heat control.
playing with gap will simulate base dwell by encouraging the plug to fire fractionally earlier.
also, a retracted tip plug will cut down on the chance of over heating the base electrode and dripping it into the cylinder, as well as providing an unlimited amount of possible grounding points for the spark to ark to.
injection type be dammed, with the cylinder pressures during combustion at +21psi-g, you still making heat.
#19
Senior Member
Iridium plugs are actually really good plugs. The problem with them has nothing to do with heat, they disperse heat just fine. The problem is that it can be hard to prevent spark blowout on them when used under extremely high compression. The gap has to be closed up quite a bit to prevent spark blow out but then that causes the car not to run as good at idle and normal driving.
#20
Senior Member
iridium's are known for there poor performance in high heat. its simple.
they are great for high millage and such, due to the temps at which they fire.
While you gain durability, at the same time you lose spark energy and heat transfer due to
their high electrical and thermal resistance. The more spark energy you have, the more
power your engine can make. Likewise, the faster the plug can transfer heat, the better it
can resist engine damaging detonation
they are great for high millage and such, due to the temps at which they fire.
While you gain durability, at the same time you lose spark energy and heat transfer due to
their high electrical and thermal resistance. The more spark energy you have, the more
power your engine can make. Likewise, the faster the plug can transfer heat, the better it
can resist engine damaging detonation
#21
Senior Member
iridium's are known for there poor performance in high heat. its simple.
they are great for high millage and such, due to the temps at which they fire.
While you gain durability, at the same time you lose spark energy and heat transfer due to
their high electrical and thermal resistance. The more spark energy you have, the more
power your engine can make. Likewise, the faster the plug can transfer heat, the better it
can resist engine damaging detonation
they are great for high millage and such, due to the temps at which they fire.
While you gain durability, at the same time you lose spark energy and heat transfer due to
their high electrical and thermal resistance. The more spark energy you have, the more
power your engine can make. Likewise, the faster the plug can transfer heat, the better it
can resist engine damaging detonation
#22
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I had nothing but misfire issues with the o.e. iridiums, I've since switched to the new denso TT, platinum twin tip plugs, gapped at .33 and the car loves it. any larger gap and the car would bog between my 2-3 shifts since, but the regap it's beautiful, and I am Trifecta tuned also. As far as the densos, advance autoparts is the only store I can find that currently stocks them.
#23
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IIRC GM had the same issues with the first LNFs, then they changed them to iridiums.
I didn't say a damn thing about how they are better in any way shape or form.
I know I changed back to the OEM plug and voila, misfire problem gone.
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