I dont know about any magic, but when you back cut an intake valve do use see an improvement in flow, a loss in flow or does the back cut intake valve make no difference?
Back cut valves help the low lift flow, & I have seen it hurt OR help high lift flow, as it is said by some members here, IT depends
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
