Cam specs

zstroken

zstroken

For $$$ your name here
Joined
Sep 27, 2006
Messages
23,151
Those of you with a pulling cam, what are you seeing on the valve?

When is the intake valve opening?

When is the exhaust valve closing?
 
The ones who know won't post, and I would guess most of the others have never measured.
 
Mild cams open at 15 degrees BTDC mild cams that require cutting open 20-25degrees BTDC. About 25 degrees is about all I like to see, but I have seen cams open as far as 38 degrees BTDC which is pretty inefficient.

As far as the exhaust, street cams close 2BTDC to 5degrees ATDC. I have seen some cams that stay open as long as 22 degrees or more after TDC.

Hope this helps.

Zach
 
I imagine the rpm band you want to make power in will greatly affect the cam specs.

At what rpm are you shooting to make your 400 hp this year Dan? :hehe:
 
GOT-Torque said:
I imagine the rpm band you want to make power in will greatly affect the cam specs.

At what rpm are you shooting to make your 400 hp this year Dan? :hehe:
Click to expand...


Your behind the times, new goal. 375 this year!
 
Hamilton Cams said:
Mild cams open at 15 degrees BTDC mild cams that require cutting open 20-25degrees BTDC. About 25 degrees is about all I like to see, but I have seen cams open as far as 38 degrees BTDC which is pretty inefficient.

As far as the exhaust, street cams close 2BTDC to 5degrees ATDC. I have seen some cams that stay open as long as 22 degrees or more after TDC.

Hope this helps.

Zach
Click to expand...

what would be the best for an 05 2.8 puller and it has an auto trans. I need something to run in the 3500-4500rpm range. and still lite my 2.8 turbo.
 
If the pistons are cut, then I would go for a 215/232 pulling cam if that is all you are doing with the truck. If you are driving occasionally. I would go for a 188/225. Both have a lot more lift than our street cams. If you want to go over your setup , call me and I can get all of the specifics.


Zach
 
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