CodyzWorld

My car is a 991.2 with a 93 tune from Sam. I'm super happy with this set up and it's been such a great car to drive.
My last plug change was at 11K and now i've got 34K. I thought I was well within specs of the 30K change, it didn't miss, ran well, etc.

Brought my car to World Motorsports and they changed the plugs and coils. The old plugs did not look bad, I thought I did this too early, but.....
WOW. what a difference. On WOT it was amazing. Brought smiles and giggles like a little kid again.

Asked Sam about this and learned that slight tunes like mine should do a plug change at 15K, highly modded cars at 10K.
Wanted to post this because I didn't see this anywhere. Thanks Sam and Craig at World. Great work.

Kyrosnick

Strange. I did mine at 30k miles. About to hit 48k. Was just going to wait until the 60k miles service in ~10 months and do it all then.

CodyzWorld

If you're stock, it's all good. If you have a tune or are modded, think twice.

Kyrosnick

Stage 3+ with all bolt ons.

CodyzWorld

that's healthy, you should be doing plug changes no more than 15K

TurboSlipNot

Even if the tune is clean stoichiometrically speaking, physical/thermal stress tends to warrant early replacement as tuned or built cars tend to run plugs rated and gapped specific to the ignition requirements of the setup to handle the patterns of AF diffusion, thermal irregularities of the chamber, pressures, etc etc optimally. Even if they don't foul, the gap tends to drift, materials start to behave differently after exposure to heat and cooling cycles, and the effect on rate, temp, and duration of arc starts to show through. Normal cars don't care much about this sort of thing - plenum pull at worst; boxer spark jobs just suck a lot more.

xhrix

Or the previous ones may have been incorrectly gapped.