Spark Plugs and Wires question

I am going to be putting on a 3.4" pulley on my 2000 Grand Prix GTP. I am also going to be changing the spark plugs and wires. What do all people recommend because I have heard different things from different people. Should I buy the spark plugs that originally came with the car (AC Delco) or NGK? I was looking at both. Also, should I stay with the normal heat range or go one step colder? Second, about the wires -- Should I buy what originally came with the car or should I get different. I was looking on pfyc.com at the MSD spark plug wires. An input would be helpful. Thanks

The NGK plugs are a good bet also there are a lot of GTP people that use Autolite plugs in a colder heat range than original. As far as the wires go the MSD plug wires are a good choice although there are others out there like Accel or Moroso. If you like the MSD wires then go that way. I wouldn't go back the the OEM wires especially if you are looking for more preformance. A set of high performace coils are also a good addition.

I would go w/ the Autolite 104's w/ stock plug wires and stock coil packs. The stock wires and coils will perform just fine so dont waste your money on different coils and wires.

I agree with Ripn

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With the autolite 104's, would you keep with the original gap (0.60)?

I was browsing other forums and I saw people with the 3.4" pulley would recommend starting at 0.55 gap. Now, my second question is -- Where did people get the autolite 104s? I have checked multiple autoparts sites and none of them list 'em. And then the third question is about gapping. If I were to gap to 0.55, do I just use pliers to gap to a smaller size and then measure that size. I have seen sights that list a spark plug gapper. Does that actually adjust the gap for you or measure it, or both?

If your not going to race your car,then I wouldnt go 2 colder of plugs.Id start with the Autolite 605s which are one colder and gap them at .055.

When I use to have just the 3.4 pulley,CAI,u-bend delete and GPS PCM, I had a problem just running 1 colder plug after a month or so and got crappy mileage,then went back to stock plug and improved from 18.8 to 21.6.Just remember you need to keep your foot in it, to keep the plugs clean.

Here is a general guideline for which spark plug heat range is right for your modified supercharged vehicle, are as followed:

- Use AutoLite 605's (one heat range colder) if your car is similarily modded like this: has a 3.40” supercharger pulley, CAI (cold air induction) setup, and a lower-temp thermostat.

- Use AutoLite 104's (two heat ranges colder) if your car is similarily modded like this: has a 3.25” supercharger pulley, 1.80:1 or 1.90:1 rocker arms or very mild cam, CAI setup, lower-temp thermostat, exhaust headers, cat-back exhaust system, and reprogrammed PCM.

- Use AutoLite 103's (three heat ranges colder) if your car is similarily modded like this: has a 3.0” supercharger pulley, 1.90:1 rocker arms or aggressive cam, CAI setup, lower-temp thermostat, exhaust headers, cat-back exhaust system, port and polished supercharger housing and/or throttle body, and reprogrammed PCM.


~Larry~

If I were to gap to 0.55, do I just use pliers to gap to a smaller size and then measure that size. I have seen sights that list a spark plug gapper. Does that actually adjust the gap for you or measure it, or both?

walmart sells those plugs 605,104 and 103 as most any auto parts stores and you want to use a plug gapper not pliers.

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Thanks BigL. --- Where have people bought their autolite plugs at?

thanks Big L -- I submitted my reply just after you.

i have a 3.4 pulley, open cone, u bend delete, resonator delete, and a intense PCM, i bought the NGK TR 6s which are 2 heat ranges colder. Im thinking that these will not work well in my car. ZZperformance said on their site, use these if you run a 3.4 pully. ???? should i return them??? this is what zzperformance says about the NGK TR6s "Recommended for 3.4 and 3.25 inch pulleys. This plug will give you full mileage and doesn't require any special precautions for use. They come pre-gapped at .056-.057."

i have a 3.4 pulley, open cone, u bend delete, resonator delete, and a intense PCM, i bought the NGK TR 6s which are 2 heat ranges colder. Im thinking that these will not work well in my car. ZZperformance said on their site, use these if you run a 3.4 pully. ???? should i return them??? this is what zzperformance says about the NGK TR6s "Recommended for 3.4 and 3.25 inch pulleys. This plug will give you full mileage and doesn't require any special precautions for use. They come pre-gapped at .056-.057."

Doesn't it say something about regapping them, if you use a 3.4" pulley? I know one of the sites does.
I just read on the last thread I replied to you and you are a poor student. Where you getting all the parts. Subway give you a raise?

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no it just says that they come pre-gapped at .056-.057. Should they be re-gapped? I just want to know if they aer too cold, i have read it several sections of ZZperformance that they say they have had no ill effects of running the TR6s on a 3.4 pulley with the mods i have. And KustomKid, all i have bought for the car was a PCM, supercharger oil, and those 20$ spark plugs.......

like i said, it came with u-bend and resonator delete, open cone, and 3.4 pulley

no it just says that they come pre-gapped at .056-.057. Should they be re-gapped? I just want to know if they aer too cold, i have read it several sections of ZZperformance that they say they have had no ill effects of running the TR6s on a 3.4 pulley with the mods i have. And KustomKid, all i have bought for the car was a PCM, supercharger oil, and those 20$ spark plugs.......

Guy,
You have to cool out. We (or I) just like messing with you.
I will look and see if I can find the other site.

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Question about the autolites 605s. I take it that when everyone talks about the spark plugs, that you can use either the original or platinum type?

what? im not upset tho? sorry if your misinterpreting? i was just answering question. no one was getting "HOT HEADED" here. :) I just am worried that those NGK TR6s are to cold, i dont care about shitty mileage, if im gunna put the NGK TR6s in and they fuck up, i dont wanna have to pay for labor again to have a different set put in. I e-mailed zoomer from ZZ and asked him if they would be aright with my setup, like i said, ZZperf.com says they have had no problems running the TR6s on a 3.4 pulley with light mods.

I personly don't like NGK plugs. But they may run great in your car.
Let me know
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Question about the autolites 605s. I take it that when everyone talks about the spark plugs, that you can use either the original or platinum type?

Copper core are 605 and platinum are APP605...If you dont mind changing the plugs offten then you can go with copper core and if you want some life out of them,you can either go with Autolite APP605 or AC-Delco 41-932 gapped @ .058.

Quick tip
take a look at your stock "AC Delco Prof. Platinum" plugs
they say NGK Japan right on the seat....
If you want NGK buy the Delco Platinum
Same plug $2-3 less per plug.

what should my NGK TR 6s be gaped at? they came pre-gapped from ZZperformance at .057-.058 and im running a 3.4 pulley, u bend, open cone, no resonator and intense pcm.??? man i hope these fuckers are not to cold...

they came pre-gapped from ZZperformance at .057-.058

The gap should be ok,but I myself dont like NGK plugs.To many problems with missfires.Give them a try and see what you think.You may have good luck with those plugs.

~Larry~

thats the thing, its a risk becuase of the spark plugs being such a bitch to put in, i have to have my mechanic buddy do it and i dont wanna have to pay him twice if the NGK TR6s dont work out. Zoomer from ZZP just emailed me back and told me those are great for the setup i have ... gotta have faith in him, no? ;)

no offense but u should stop modding your car now if you cant handle a simple plug change. unless of course your physically unable to that is.

You can't pick on the guy for not working on his car. There's a lot of guys on this site, if you didn't raise the hood, couldn't find the plugs.
But at 19, I would be standing out there with my friend who is doing it, and asking how.

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yeah thats why im on this site, i have been here about a month or less now and learned SOOOO much. Dude, im sorry if i dont know how to change some plugs man, my dad is the clumsiest man and cannot build/fix shit, it runs in the family. Im only 19, i have only HAD a car for a lil over 3 years now, never once have i had to do a plug change or even get spark plugs replaced. I dont have a torque wrench or any advanced tools to work on a car with, becuase like i said, my dad isn't into fixing shit, so we dont have garage full of air tools and shit. I have screwdrivers and socket wrench set. And even if i did know how to change plugs, i still wouldn't do it myself, becuase im that way. I have about 5 or 6 different mods/things t hat need to be done to my GTP, and as soon as the michigan winter goes away, im having my friend who is a mechanic do all the shit at once...

and ripn12s, i am physically disabled....

Well that will put an end to this one.

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yeah, i have problems moving around, my penis being so big that i have it doubled over with a rubber band and duct-taped to my leg, it makes it hard for me to move, i consider it a physical disability

What does GM say the actual lifespan of the original spark plugs are before they should be replaced?

so you keep your car running good and dont wait till the plugs are fouled before you change them. Same can be said for oil. For the average driver, an oil change can be between 4000 and 6000 miles. Most cars even state in the manual change oil every 3-7k miles. I change mine every 3k. Well, i take that back, i change my BMW's oil about every 15,000 miles

What does GM say the actual lifespan of the original spark plugs are before they should be replaced?
GM says 100,000 miles. Most guys change them before that.
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yeah, i have problems moving around, my penis being so big that i have it doubled over with a rubber band and duct-taped to my leg, it makes it hard for me to move, i consider it a physical disability
Guy,
Clean it up. You have a lot of guys have kids. And we HAD some ladies that USED to be out here.
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