Originally Posted by willwren
Stretching the brain, I see two possibilities. The first will be a question, and the second will be a suggestion.
1. What air filter are you running?
2. Acoustics. A FWI or stock airbox will absorb and naturally damp acoustics. Your hard-piped FWI may be resonating or simply picking up road noise and not damping it, transmitting it to the engine in the form of noise, causing false knock.
Thats for the great information. If it is false, how do you tell whats false and whats real KR?
The filter is a K&N
RC-4630 Product Specifications
Product Style: Round Tapered Universal Air Filter
Base Outside Diameter: 5.5 in (140 mm)
Flange Inside Diameter: 3.5 in (89 mm)
Flange Length: 1.25 in (32 mm)
Flange Type: Centered
Height: 6.5 in (165 mm)
Top Outside Diameter: 4.5 in (114 mm)
Top Style: Metal
Top Material/Finish: Chrome
Filter Re-Oiling Amount: 1.45 oz (43 ml)
Weight: 1.3 lb (0.6 kg)
Product Box Length: 11 in (279 mm)
Product Box Width: 6.5 in (165 mm)
Product Box Height: 6.5 in (165 mm)