Home Forums TaG Rotax Max RAVE valve – Exhaust Sound? Reply To: RAVE valve – Exhaust Sound?

Eric Alexander

Good info there.  Thanks Nick!

For the record, there’s alot of vodoo written but the RAVE valve – “set it so many clicks”… etc.  From what little reading I’ve done, the design of the valve comes close enough to the piston that the 7500 rpm is critical to operation.  Open too soon and cylinder compression is lost before the 7500 rpm timing shift.  Open too late and the exhaust restriction reduces HP gains from the higher compression rate after the 7500 rpm timing shift.