[chevrolet327]

Originally Posted by techinspector1

Should work with SCR of 8.75:1 to 10.75:1. 112 degree lobe separation angle should produce more manifold vacuum and smoother idle than a 110 or 108 or 106 grind. It's not the type of cam I might use if I were looking for power in a mud truck. I wouldn't be particularly interested in manifold vacuum or idle quality. I'd probably be looking for a narrower LSA.

Agree with ap72 about the agresssive ramps. If you deduct the advertised duration from the 0.050" duration, you get 43 degrees on the intake and 41 degrees on the exhaust. This is pretty radical, so on a cam like this, I'd resist using other than a stock 1.5 rocker ratio.

Think about it this way: If there is a total of 41 degrees difference between 0.006" tappet lift and 0.050" tappet lift, that means that (given a symetrical lobe) there is 20.5 degrees of difference on each side of the lobe (20.5 on the opening ramp, 20.5 on the closing ramp). That's in crankshaft degrees. If you convert that to camshaft degrees, that means that the lobe is lifting the tappet from 0.006" off the base circle to 0.050" off the base circle in just 10.25 degrees of camshaft movement. That's on the ragged edge of geometric feasibility without having the edge of the tappet digging into the cam lobe.

In my opinion, putting this kind of stress on the valvetrain parts for a very small gain in power is ludicrous.

do you have a good recomman dation for my setup

[chevrolet327]

i have change my torque with a 2400 stall 10 inch and i also have give 4 degree avance on camshaft and change the edelbrock 750 for a truck avenger 770
incredible difference that what i looking for thanks for the help