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Spark Plugs for APR Stage 2?

Terrafirma10

Passed Driver's Ed
Location
North Carolina
So my question is what plugs should I be running for APR stage 2? On APR’s website it recommends to run NGK R7437-9. If you look at older posts I think APR use to recommend series 8 but now saying 9. But I also found this posted on the VWVortex forum last year (Feb. 28 2017) by an APR employee. A little confused.

We use the NGK R7437 9 for Stage 3 and racing applications. You can use the 8's at stage 1 / 2 for street applications.

I daily drive my car and maybe 2 or 3 track days a year.
So which plugs?
1. NGK R7437-8
2. NGK R7437-9
3. R7 plugs

Thank you
 

Wild Hare

.: MR. BIG STUFF :.
Location
Nortvest
Ride
2015 Golf R (TUNED)
My APR tuner just changed my plugs to the RS7 while the car was in for service. He said it was APR's current recommendation for my Stage 2 tune.
 
Last edited:

Golf R1

Ready to race!
Location
Tampa Bay
Bumping this, I contacted APR support and was emailed this reply, which matches their website's current recommendation:

APR recommends using colder heat-range spark plugs (Ex: NGK-R7437-9), properly gapped to a tighter gap (Ex: 0.024" ±0.002" or 0.6mm ±0.05mm), properly installed and torqued (Ex: Per the manufacturers specifications), and maintained with a shorter changer interval (Ex: 10,000-15,000 mi or 16,000-24,000 km).

I replied: Just to be certain, I'm Stage II+ on my 2016 MKVII, should I replace my plugs with:

NGK-R7437-8?
NGK-R7437-9?
NGK 06K905601M (RS7 plugs)?

He emailed back:

NGK-R7437-9 gapped to 0.024

While all of these options are likely fine to run with, the latter is their official recommendation.
 

SugarMouth

Go Kart Champion
Location
Nevada
My APR tuner just changed my plugs to the RS7 while the car was in for service. He said it was APR's current recommendation for my Stage 2 tune.
Interesting. They used to recommend (on the website) Denso then went to NGK as a recommended plug. Now they threw in RS7 plugs in your car.
 

Golf R1

Ready to race!
Location
Tampa Bay
I just ordered these (NGK-R7437-9) from Rock Auto @ $28.99 ea. I'm currently running NGK-R7437-8 for about the last 15K miles. I doubt I'll notice a difference going to the slightly cooler plug.
 

Bäsemödel

Go Kart Champion
Location
Lancaster PA
I think I’m going to change them out for stock plugs when I get home from this trip from TN to PA. It’s been idling kinda funny. Like it’s gonna stall... but the tach doesn’t move to reflect what I’m feelin in the seat... I’m is20, JB4 map 6 and (soon) downpipe. Worth going to the RS7 plugs?
 

Golf R1

Ready to race!
Location
Tampa Bay
Finally got around to installing the NGK-R7437-9 plugs and they feel more responsive than the NGK-R7437-8 plugs. I had 15K miles on them, perhaps that was the difference (new vs used). Either way, I'm happy with these plugs. The old plugs had a uniform wear pattern, which was nice to see.
 

imtimmy

Ready to race!
Location
Plano, TX
When my car was first tuned to stage 2 just over a year ago I had the NGK 7437 plugs installed "racing plugs" recommended per APR website. They lasted 15k miles and were great but pricey. This time around I ordered the RS7 plugs, $52 from DAP with bonus points. Honestly, driving around with the RS7 plugs for a couple weeks now, the car does feel a tad less manic, a tad bit slower, a tad bit urgent. I really didn't think there would be a difference at all but there is in my experience between the 2 sets. Now, I did save $100 this time around and the car is not slow but it really does feel just a slight bit off from running the racing plugs. Nothing wrong with either set of plugs for tuned cars. If I happen to have an extra $100 to throw at plugs next time around I will likely get the 7437's again. Not sure if the gapping on the RS7 plugs is what is making the difference in feel and performance. I have them gapped at 24 just the same as the racing plugs were at the time of use. Just my 2 cents from personal experience.
 

JerseyDrew77

Drag Race Newbie
Location
Virginia & NC
For Stage 1 and 2 cars, you don't need those NGK race plugs. Don't know why APR is pushing that on you folks but they are wrong in doing so. Those race plugs, heat range 9, are meant for Stage 3 and 3+ cars.
 

DiscusInferno

Ready to race!
Location
Kalifornia
APR probably thinks the .6mm Iridium tip plug works better for their tuning, than a 1.1mm tip for Platinum

If NGK made an iridium-IX series equivalent, they would probably recommend that instead.

Sent from my moto x4 using Tapatalk
 
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