konad

I'm sorry if this has been covered before, I did search and didn't come up with anything that really answered my questions.

I just purchased a set of Crower Stage 2 turbo cams from a forum member (63401T-2).

I have failed to find a lot of information on these cams so I am trying to find a similar more common cam for comparison purposes. Here is the breakdown of the stats. As far as my high school algebra will take me at least.

Intake: 308 duration, .467 lift. I'm assuming that is in inches. Converted to MM its 11.8618

Exhaust: 309 duration, .445 lift. 11.557 mm

My attempt at calculating overlap.

I+E duration = 617 ÷ 4 = 154.25 - 108 lobe seperation = 46.25 x2 = 92.5

Now maybe its just me but if my math is right 92.5 overlap seems pretty intense and like it would produce a lot of lope. Not so kind on the street, no? Can anyone point me in the direction of another cam with a similar profile so i can possibly see some videos or numbers before I install these things? Personal experience or opinions would also be very appriciated. I've run big cams on the street before but would like to know what I'm getting myself into this time.

Thank you.



Edit: I should also mention on the sheet that came with the cams under notes it says "Upgraded cam profile (-2) Did I just buy someones custom grind? lol.

Current setup for reference.

-Cp pistons 81.5mm 9.0 to 1
-Eagle Rod with 3/8mm rod bolts
-Skunk2 valves, spings and retainers
-Peakboost Turbo kit
-garrett gt3076r .63 ar

konad

Nobody?

ahobbs

you need to know what the centerline is on the cam. Once you have the centerline you can find the actual "specs" of the cam. Call the person you bought them from and ask what the centerlines are. Those numbers only mean so much until you put them in the motor cause they will change. But according to what your showing that's a big cam on a 30r

If i would give you advice on another cam I personally like web cams.

konad

The sheet that came with the cams says "If using "Lobe Center" method of degreeing, cam should be installed on a intake centerline of 104°". Not sure if that helps.

ahobbs

then that's exactly what you need to do. Once you install them using that method, which is the best and most acurate method you can get your true specs of what the cam is on your engine.