Not sure if my input will help anyone here.
I moved to RS7 plugs many moons ago to compliment my EQT Stage 2 tune and smooth out the engine idle.
It took me a while to wrap my head around these crazy low spark plug intervals tuners and owners are prescribing:
Iridium plugs are normally good for 90-100k on a stock engine, and 50k on a boosted motor like the Ford EcoPoop motors, VWs etc.
Anyway, I put 25k miles on my first set of RS7 plugs. They were faultless until this last winter, when temps got into the
40s, which is nipples freezing cold for a Texas car.
At WOT above 4000-6500rpm, it was cutting out badly and I worried something significant might be broken.
On a whim, and to rule out the simplest possibility, I ordered a fresh set of RS7s and stabbed them in @.024-.027” like always.
The old plugs did not look visibly fouled nor excessively worn/tired.
Car ran smooth again and never had any issues cutting out. It did 3 track days this year and earned high praises from some
Very quick drivers out there.
I suspect a 20k service interval on RS7s might be the ticket for cars making ~400whp and below.
Mine only makes 320-330whp on 93 octane with the stock IS20 snail, and it loves the RS7s, as does my wallet.
Do I fear the prospect of the ground strap ever breaking off? F**k yes! I love this car and I can’t afford a new motor. I can barely afford gas for it in this crapped out economy.
But these have been great to me, and I don’t use a sledge hammer to gap my plugs.
I’d be interested in hearing from more folks who HAVE had positive experiences with the RS7 plugs, since they’ve been a go-to for (literally) thousands of MQB owners who turned up the boost and party hardy.
My $0.02, served from years of experience and lots of curious research.
Love for my MQB brothers.