Spark plug NGK or Autolite

NGK Spark plug

I'm currently is20 United 91 octane tune, APR packs and NGK RS7 plugs (one step colder thant oem), gapped at around 0,028'' and car feels solid. No misfire, no EPC. However it honestly feels just like when I was with oem coilpacks and plugs. Maybe now idle feels a little bit smoother.

Pros: solid performance, smoother idle
Cons: similar to OEM
Part number: RS7
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NGK Spark plug
ROH ECHT
  • Acceleration:
Rating 4.5

I did reduce the gap of the PFR7Bs to 0.025" when I was running DriverMotorsports K04+ tune and it boosted more than 26 psi. I did so due to upper rev stumbling, but for being back to running my GIAC HO K04 tune...0.028" works. PFR7B usually work great with higher boost from turbos and tunes when you do notice the stumbling for having arc disturbance.

Pros: work great with high boost
Cons: stumbling with wrong gap
Vehicle: Volkswagen
Part number: PFR7B
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NGK Spark plug
WILLCCU
  • Acceleration:
Rating 3.0

New NGK plugs were a definite improvement. MSD coils were not!

Pros: definite improvement
Cons: MSD coils were not
Vehicle: Volkswagen
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