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The old NA1 VTECs are definitely detectable by the driver as you described.In fact, there are (I think) 3 changes that the engine makes as the RPMs increase. I believe that at 4100 rpm, the fuel pump relay switches to high voltage. I can easily hear mine click, especially since I am used to it after so long.At some higher RPM, I think it is the intake runner length that changes. I can definitely be wrong about this.Then, at over 5000 (5800 maybe, I forget what RPM exactly) VTEC kicks in.The 2nd two make the engine growl a bit differently and I can feel a little bump in power from the VTEC change.
The old NA1 VTECs are definitely detectable by the driver as you described.
In fact, there are (I think) 3 changes that the engine makes as the RPMs increase. I believe that at 4100 rpm, the fuel pump relay switches to high voltage. I can easily hear mine click, especially since I am used to it after so long.
At some higher RPM, I think it is the intake runner length that changes. I can definitely be wrong about this.
Then, at over 5000 (5800 maybe, I forget what RPM exactly) VTEC kicks in.
The 2nd two make the engine growl a bit differently and I can feel a little bump in power from the VTEC change.
