318 timing chain.....and why the engine should come out.

MopaR&D said

That tells you the steepness of the ramps. Less advertised duration with more duration at .050" means steeper ramps on the cam lobes which opens and closes the valves quicker. Modern performance cam designs use faster ramps, old-school cams (like the older Mopar Purple Shafts) use slow ramps. Others can chime in regarding how that affects performance I'm not super knowledgeable in that realm.

Click to expand...

That now makes perfect sense.
And your right....how it affects the performance doesn’t make sense but it shows the direction I can go if I want to find out.

I figured a 285 was a 285
And a 268 was a 268

Except that 285 increases low end torque.....and the 268 robs it.
It’s contrary to what I’ve always understood. I’ve usually stuck with a stock cam as I never need much power and really drive these on the highway in town like a grocery getter that they are.

The 318 sits on a fine line of cam selection. Too much and it’s no fun


..........is that an original set of rings from back in the day in the original boxes? Back then was a better time. I’d trade cell phones and the internet for it any day