Can someone double check my DCR?
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,069
Likes: 8
From: Sanford NC
Can someone double check my DCR?
The calculator I have always used is down the other one I found calls for some math that doesn't add up when I plug in my previous motors. This cam has the latest IVCP ABDC of any cam I have ever used and it is my smallest. I am afraid I lost over a point of DCR with it. The motor is a L33 5.3L with 9.9:1 SCR.
Engine Specs
Head 64cc's
Gasket .052" 3.910"
Bore 3.78"
Stroke 3.622"
Rod 6.098"
Deck 0
Cam Specs
Comp LSR
215/223 .604/.610 112
IVC ABDC is 60*
I am coming up with 6.5:1 DCR using the math that matches the other motors. I get 7.2 when using the sights math. It uses the IVCP ABDC + 15. But the other motors add up using 25 that someone suggested using this calculator.
My other question is how does this little lobe close so late. My two other cams had at least 30* duration and .020" lift on the same lobe sep. One came in at 49* and the other had 53*. I don't get it.
Engine Specs
Head 64cc's
Gasket .052" 3.910"
Bore 3.78"
Stroke 3.622"
Rod 6.098"
Deck 0
Cam Specs
Comp LSR
215/223 .604/.610 112
IVC ABDC is 60*
I am coming up with 6.5:1 DCR using the math that matches the other motors. I get 7.2 when using the sights math. It uses the IVCP ABDC + 15. But the other motors add up using 25 that someone suggested using this calculator.
My other question is how does this little lobe close so late. My two other cams had at least 30* duration and .020" lift on the same lobe sep. One came in at 49* and the other had 53*. I don't get it.
