Join Date: Mar 2007
Location: San Antonio, Texas
How to choose different intake and exhaust cams?
As previously discussed here on the bb, Alfa motors respond very well when different cams are used for the intake and exhaust. Doing this allows you to make good power but also maintain torque. I'm curious about how you should choose the second (exhaust) cam in a performance engine. I often see recommendations for 12mm intake cams paired with 11mm exhaust cams.
But, if you are using a modern cam design like, say, RJR's 136 cam or a JK303cam for the intake how do you choose an exhaust cam that will work best with the 12mm intake cam? For instance, should you use a pretty mild cam, something that is close to stock perhaps, or should you choose a slightly less agressive version of the 12mm intake cam? How should the two different cams interact to get the best results?
Jim . . . '72 Super 1300, '70, 1750GTV, 2nd series,
'62, Lancia Flaminia Zagato3c, 2nd series
Last edited by 180OUT; 06-27-2012 at 03:06 PM.