Supercharged car plug changes.

[Jinx]

Just out of general curiosity, how many miles do you guys with FI change out there spark plugs? I'm doing some spring time freshin up and got my new HT0s.

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[Brezick]

My tuner recommended 10k miles.

 

[JesseW.]

my vortech manual said once a year or 20,000 miles. whichever came first.

 

[01yellerCobra]

Between 10k and 15k. Depending on how busy the kids are keeping me.

 

[Jinx]

its been 1.5 years now.

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[GT E UPP]

For me, a fresh set HTO's go in every Spring....

 

[Hatchman]

I've had mine in for 22K and it still runs great, but I am doing it soon.

 

[ncpower08]

I wait 10,000 miles at the most.

 

[skwerl]

Considering the plugs in naturally aspirated cars are good for 100K miles, I think 10K mile changes might be just a tiny bit excessive. At least we don't need to remove the motor mount and lift the motor to get to the rear plugs like my F150. I did swap my plugs to the NGK Iridium one step colder than stock a few months after installing the blower but it will probably be a couple years before I swap them again. I did pull them and check them last week and all appeared fine.

If you have the older style heads with the crappy 2 piece plugs then I can see swapping them often before they corrode and break apart.

 

[TimMcc]

Mine have been in a year now with about 5K miles on the with the whipple. They looked brand new. I'm not changing mine. F That noise.

 

[Sky Render]

Shouldn't you only need to change your plugs that often if it is running extremely rich?

 

[Swarzkopf]

Shouldn't you only need to change your plugs that often if it is running extremely rich?

FI stuff runs richer then NA stuff does.
It really shouldn't be a factor under higher throttle situations, but usually FI tunes are a little "sloppy" and tend to run fat on the outside edge of boost. Overtime this causes carbon build up and fouling.

FI usually requires colder plugs, too, which doesn't help- hotter plugs are more resistant to carbon build up under normal throttle, cruise, and idle conditions, where as colder plugs have a tougher time burning carbon off.

Anyway, I'm figuring to get two years out of the plugs in mine. They look fine after a year of FI, and there's no evidence of fouling or misfires.

 

[drive_55_not]

I've got a set of NGK Iridium plugs, Currently have 17,000miles or so on em' , My tuner recommended changing them at 20,000 miles.

Mine are gapped at .035, I checked the gap a couple weeks ago and the gap had opened to .037-38 on the four on the passenger side (bank 1 as its called) That side runs hotter than the drivers on my car, dunno if thats true of all 4.6 3v's or not.

The drivers side were still .035-36 and the color was a nice grey-tan on all 8 as I haven't been tracking the car much this winter.

 

[Jinx]

I just changed them. It's running much better. It had a faint stumble to it before the change and it felt sloppy, for lack of a better description. It's my daily driver so I put the miles on it. Runs 100% smooth. I guess it was needed.

 

[GerRod]

I installed my Brisk plugs with the supercharger last June and they are running fine. My plan is to change them every 10k miles, but at the rate I'm going, I might not change them again....lol...I only have 2k miles on them...

 

[loots06]

10-15k here

 

[JeremyH]

After adding the turbo and getting it tuned I put around 1,000 miles on a set and then changed them, now I change them once a year or every other oil change basicly.

 

[Weou09]

Considering the plugs in naturally aspirated cars are good for 100K miles, I think 10K mile changes might be just a tiny bit excessive. At least we don't need to remove the motor mount and lift the motor to get to the rear plugs like my F150. I did swap my plugs to the NGK Iridium one step colder than stock a few months after installing the blower but it will probably be a couple years before I swap them again. I did pull them and check them last week and all appeared fine.

If you have the older style heads with the crappy 2 piece plugs then I can see swapping them often before they corrode and break apart.

What year f150 do you have and what motor? I just changed my brother's(2007 5.4) and didn't have to do any of that...I used a short extension and wiggler for the back 2.

Also you guys are nuts! There is no way in hell, if the tune is on, that a spark plug would need changing every 10k miles. Now I do take one out of each bank every oil change to inspect and every other oil change I will remove all of them and reapply anti-seize to assure none break when it is time to replace. Some of you guys replace plugs more than I do in my 2-stroke dirt bikes.

 

[Swarzkopf]

Also you guys are nuts! There is no way in hell, if the tune is on, that a spark plug would need changing every 10k miles. Now I do take one out of each bank every oil change to inspect and every other oil change I will remove all of them and reapply anti-seize to assure none break when it is time to replace. Some of you guys replace plugs more than I do in my 2-stroke dirt bikes.

So how many supercharged or turbocharged 3V Mustangs have you done this with?

The car in your sig doesn't look like it has forced induction- so as stated above, it's a completely different game with FI.

 

[Weou09]

I've never owned a FI 3v but I have owned a vortech powered fox and a supercharged frontier with a pulley swap. Neither of which required those kind of service intervals. I wasn't commenting on this to start an argument.