I'll buy some one a free beer or two at the nationals if they can answere this cam question at the end of this post.
For a naturally aspirated motor a cam usually has more exhaust duration than intake. What goes in has to go out, if you dont get it all out then next time you cant draw as much back in. A N/A cam usually runs higher exhaust duration because entire exhaust track is more restrictive than the intake track.
For a supercharged motor you tend to run an even heavier split in intake to exhaust duration. The supercharger is forcing alot more air than normal into the motor, and therefore you need to open the exhaust valve even longer to get rid of it all.
The turbo cams that are available are ether ground even up or have more intake duration than exhaust. Now the intake track has a compressor trying to force the air into the motor, and the exhaust has heavy back pressure on it do to driving the turbine section. To me it seams that getting the exhaust out of the cylinder on a turbo motor is a bigger challenge than getting fresh air into it.
Why aren't turbo cams ground with more exhaust than intake duration?
TIA: Jason
For a naturally aspirated motor a cam usually has more exhaust duration than intake. What goes in has to go out, if you dont get it all out then next time you cant draw as much back in. A N/A cam usually runs higher exhaust duration because entire exhaust track is more restrictive than the intake track.
For a supercharged motor you tend to run an even heavier split in intake to exhaust duration. The supercharger is forcing alot more air than normal into the motor, and therefore you need to open the exhaust valve even longer to get rid of it all.
The turbo cams that are available are ether ground even up or have more intake duration than exhaust. Now the intake track has a compressor trying to force the air into the motor, and the exhaust has heavy back pressure on it do to driving the turbine section. To me it seams that getting the exhaust out of the cylinder on a turbo motor is a bigger challenge than getting fresh air into it.
Why aren't turbo cams ground with more exhaust than intake duration?
TIA: Jason