ok here are the numbers for scott performance cams
there are 2 cams for forced induction stage one and stage two
stage one cam specs 215.@ .050 dur 403 lift 261degrees @.016 stage two cam specs 213@.050 dur 410 lift 255 degrees @ .018
the magic is in the way the lobe is design for opening and closing the valve.
its not all about lift and duration but when it lifts and when it closes and how fast. you can have the same lift and duration on the cam but the times the valve opens and closes be different, you can loose your power. as we have all heard in this world timing is everything.

 

thanks for the info, i know many have asked for these specs

 

Ehhhh, is it just me or do i have trouble understanding those cam specs?

So Stg one cams are a 215 duration and a 403 lift? I thought lift was measured in milimeters?

 

Someone should compare those specs to the JWT cams and translate it to Engrish for me.

 

Where did u get the info from, I know Ted wouldnt tell anyone these specs, unless hes tired of ppl asking so he puts out some bogus specs. Just curouis

 

I really tried to decipher those numbers into more easier understood terms, but it's very difficult. For example, HKS or Tomei spec their cams such that they give the duration and peak lift. Example- 258deg/9.15mm lift. Crower and crane cams don't spec the cams this way. The true numbers are closer to how drives4fun delivers them. A cam lobe does not have to be symetrical. To the naked eye they may look as such, but it is not how they are. This is why most manufacturers of camshafts include a degree sheet to explain this and you can dial them in appropriately.

I know for a fact that HKS prefers the cams to be put in as stock, but it is not necessary. You can dial in your cam gears accordingly to your preference (on most engines). I was under the impression that my calculation were correct @ 242 degrees and 10.55 mm lift for stage one (I apollogize, these numbers were not accurate).

I just double checked these numbers with my machinist and got a 1/2 hour conversation on how I was wrong and how complicated the specs actually are. From my interpretation, at 215 degrees of crank rotation the valve starts to open (.050 lift). Max lift is .403" or 10.25mm. The valve starts to be completely closed (.016 lift) at 261 degrees of crank rotation. How many degrees of duration of max lift is unknown without knowing the up ramp duration and close ramp duration. This can be measured on the engine w/ a degree wheel and a micrometer. All this information and we haven't even covered overlap.

So, I've got the max lift right now. Let's work on the duration next.

I would appreciate anyone chiming in on this to veryify.