...change the LSA of the cam(s) and you will decrease the valve overlap. the bigger the duration, the higher in the RPM you will make power, and the more power you will make given that you have a head/intake that will compliment the airflow abilities of the cam(s)


that isn't necessarily true. its a give/take relationship. for the efficiency lost in the lower RPMs, efficiency is gained in the upper RPMs. and while im vaguely inclined to agree with most of this statement, im going to have to drag you along with me cause its about to be picked apart with a fine tooth comb. DCR is directly dictated by the valve event of the intake opening in correlation to the piston BTDC. the more degrees BTDC that the intake valve begins to open, the lower the DCR will be. but you can always alter at what degree the intake valve opens. and the DCR is always ever-changing, cause damn near everything effects it.

 

thank you for sharing what you know with me. i read all that i can and try very hard to gain full understanding of how this machene works. thanks again. kyle

 

keep on reading. seems like you have a fair grasp of what is going on. find something that you feel you need to be knowledgeable in and work on that. cars in general is such a broad spectrum not many people can completely encompass it.