04-22-2007, 04:30 PM
It is a double valvespring in the video.
The spring itself shouldn't spin much at all.
In a racing application you want to keep the valve spring pressure as light as possible to reduce power loss, but not light enough to loft the valve or float them at high RPMs.
When the valve slams shut, because of the lift and the pressure of the spring, it will bounce the valve off of the valve seat.
The spring itself shouldn't spin much at all.
In a racing application you want to keep the valve spring pressure as light as possible to reduce power loss, but not light enough to loft the valve or float them at high RPMs.
When the valve slams shut, because of the lift and the pressure of the spring, it will bounce the valve off of the valve seat.
2014 Tacoma TRD Sport Double cab
2017 Toyota iA/Mazda 2
2017 Toyota iA/Mazda 2