gt starlet plugs

[DOHMAN]

hey guys im going to replace the spark plugs in my starlet what be the best plugs to get for it at the moment its missing when it warms up and when the revs get high under boost

[Lloyd]

Whatever standard plugs are listed. Genuine plugs aren't that badly priced either btw

[Burning Angel]

just get the standard NGK or Denso plugs for it. they'll only be $6-$7ea

if you want a longer lasting and better performing plug you can go for an iridium but they are quite a bit more expensive at $20-$30ea(maybe cheaper if you know someone in the trade or can get discount)

[Bling]

if you want a longer lasting and better performing plug you can go for an iridium but they are quite a bit more expensive at $20-$30ea(maybe cheaper if you know someone in the trade or can get discount)

Are they actually better or do they just last longer?

I heard the copper spark plugs gave a better spark over iridium?

[Twolitre]

STA parts sells NGK Iridiums for $14 so anyone that pays more for them is getting ripped off. Check out their website as they do deliver.
I'd reccomend just replacing all 4 with NGK BKR6E-11's however the cause of your miss is probably faulty leads, cap and rotor

[Burning Angel]

if you want a longer lasting and better performing plug you can go for an iridium but they are quite a bit more expensive at $20-$30ea(maybe cheaper if you know someone in the trade or can get discount)

Are they actually better or do they just last longer?

I heard the copper spark plugs gave a better spark over iridium?

electrons find it easier to jump from a sharp point. copper plugs cant have a sharp point because it would be eroded too quickly.

but in most cases copper plugs will be more than adequate, especially for Vtecs as they take a special plug(bkr6en-11)

[escortman]

i only ran $2 ngks in mine went sweet, didnt even change them after the run in tune

[finx]

is the car modified at all? if so to what extent. a colder plug will be better for turbocharged vehicle. think the factory ngk rating for the 4efte is a 6 but if it has bigger turbo, increased boost levels and the like i would be going for a 7 or 8 heat range with a smaller gap as well.
need some info on the car to give an accurate answer as to what type you should be getting for it.

[DOHMAN]

na no major mods just a pod filter external wastgate its runnin about 10psi think i mite just replace them with standard plugs and standard leads giong to get the timing cheacked tommorow

[finx]

if its a fairly stock set up then yes the listing for stock plugs will be fine.
go for ngk plugs. bkr6e11 is the part no

[tsoob]

is the car modified at all? if so to what extent. a colder plug will be better for turbocharged vehicle. think the factory ngk rating for the 4efte is a 6 but if it has bigger turbo, increased boost levels and the like i would be going for a 7 or 8 heat range with a smaller gap as well.
need some info on the car to give an accurate answer as to what type you should be getting for it.

wouldn't you want a bigger gap? a larger spark will surely mean more power? thats how my tuner explained it to me.

[sergei]

is the car modified at all? if so to what extent. a colder plug will be better for turbocharged vehicle. think the factory ngk rating for the 4efte is a 6 but if it has bigger turbo, increased boost levels and the like i would be going for a 7 or 8 heat range with a smaller gap as well.
need some info on the car to give an accurate answer as to what type you should be getting for it.

wouldn't you want a bigger gap? a larger spark will surely mean more power? thats how my tuner explained it to me.

Size of the spark is not affecting the power of combustion, it either ignites or doesn't.
With higher pressures you need to have smaller gap for same voltage to spark.
It is stupid to think that if you put more powerful coils that you will have more power, it only will work if the current items are inadequate and miss-firing.

[tsoob]

is the car modified at all? if so to what extent. a colder plug will be better for turbocharged vehicle. think the factory ngk rating for the 4efte is a 6 but if it has bigger turbo, increased boost levels and the like i would be going for a 7 or 8 heat range with a smaller gap as well.
need some info on the car to give an accurate answer as to what type you should be getting for it.

wouldn't you want a bigger gap? a larger spark will surely mean more power? thats how my tuner explained it to me.

Size of the spark is not affecting the power of combustion, it either ignites or doesn't.
With higher pressures you need to have smaller gap for same voltage to spark.
It is stupid to think that if you put more powerful coils that you will have more power, it only will work if the current items are inadequate and miss-firing.

i was more asking about the size of the gap, i remember having a long discussion with my tuner about it and from my memory the size of the gap is very important when you are running high boost

[sergei]

is the car modified at all? if so to what extent. a colder plug will be better for turbocharged vehicle. think the factory ngk rating for the 4efte is a 6 but if it has bigger turbo, increased boost levels and the like i would be going for a 7 or 8 heat range with a smaller gap as well.
need some info on the car to give an accurate answer as to what type you should be getting for it.

wouldn't you want a bigger gap? a larger spark will surely mean more power? thats how my tuner explained it to me.

Size of the spark is not affecting the power of combustion, it either ignites or doesn't.
With higher pressures you need to have smaller gap for same voltage to spark.
It is stupid to think that if you put more powerful coils that you will have more power, it only will work if the current items are inadequate and miss-firing.

i was more asking about the size of the gap, i remember having a long discussion with my tuner about it and from my memory the size of the gap is very important when you are running high boost

The higher the boost the lower the gap for same coil voltage and spark plug.

[finx]

if the distance the high voltage charge has to jump is to big in a high boost or high compression situation the increased pressure in the combustion chamber can interfere with the spark which cause's piking and pre ignition. so you require a smaller gap.
a larger gap will mean it is harder for the high voltage charge to jump and cause spark. combine this with increased cylinder pressure and you start running into issues with not enough spark as it cant make its way to ground.
you can do things like plug indexing and the likes to gain power but it will be very little, very expencive (unless you have a dyno if your garage). and is only really used in race applications where cars are spec limited or maxing out potential hp.

[DOHMAN]

went into repco today priced up the standard plugs which are platnum plugs they were bout $30 a plug

[johndoe1025]

thats ripco for ya, try bnt or similar

[DOHMAN]

plugs done all fixed no more miss at high revs

[DOHMAN]

ok tell a lie the miss is back im goin to get the leads checked out by my mechanic when he has a look at the idle speed controller as its idling at 2000rpm

[finx]

there is an idle adjustment screw on the top of the throtal body under a black blanking cap wind it in untill it is set right. if its still to high i would be looking at a possible vacume leak from the intercooler/piping or inlet manifold and aux hoses.
can also idle high if air con has been removed. there is a plug that needs bridging.
leads are easy to check. any excessive dirt or oil on them will trace spark, also check the ends are all making good conections for starters.