#### rod7515

##### Well-Known Member

Rod

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- Thread starter rod7515
- Start date

Rod

what I would do is advance the cam 4 degrees and try it

if no change or loss then retard 4 degrees

any change will tell you if intake close and duration should be changed

new heads will give the biggest gain

so I would not spend my head and B3 money on rockers

test first

Take .575 and divide it by 1.5 = .383

Now multiply .383 by 1.6 = .613

I believe it adds some duration, but I honestly don't know if it's enough to even notice. I've always been under the belief it might be a degree or 2.

Take your lift and divide by 1.5 which is .383, so you have a .383 lobe.

Take your .383 lobe and multiply that by 1.6 and your new lift would be .613.

I’m not sure of how to exactly figure how much more duration you’ll get, but the math smart guy’s probably can. I say you’ll pick up 2 degrees at .050 but don’t hold me to that.

Or if you are lazy like me....... divide the lift by 15 and multiply it by 16, saves a couple clicks for the decimal points.

Or if you are lazy like me....... divide the lift by 15 and multiply it by 16, saves a couple clicks for the decimal points.

100% true. But I’m a weirdo so when calculating compression ratio and stuff like that I work to the third digit!!! So a couple of decimal points is just a bink bink on the keypad for my sausage fingers.

100% true. But I’m a weirdo so when calculating compression ratio and stuff like that I work to the third digit!!! So a couple of decimal points is just a bink bink on the keypad for my sausage fingers.

Being simple minded, I tend to simplify things....

Or, maybe I really am lazy.