Why Is This Man Smiling?

[RICK LAKE]

Barry I agree about the canted valves and the 5.0" bore centered, but a high speed intake charge should take some of the advantage away. A D port flows better than a oval port on exhaust. If some one shows up with a nascar motor they should win. Intake ,heads, cam, and exhaust is where the power is, Where do lighter parts come into play? I would think that a valve spring with 700lbs of max lift pressure would use more HP than a 400lbs at the same max lift. I would think that looking for 5/16 valves with the same size valve diameter with less wieght would make more power. Just like the honda rods 1.88 instead of the 2.0 rods, less friction less power drain. Would not it be more of an advantage to have a motor max out at 200 rpm over the max pull number. Valve float and bounce have a large part in power lose? NO Yes. How about pushrods, I know they flex under load, 3/8 hollow pushrods would save weight, less power drain. There must be a fine line betweenmax flow for a head and max air/fuel mixture speed into the cylinder for a head. Schbeck lifters are a pollymor material with less weight than a solid roller lifter, they make the V shape one for roller cams again lessweight more power to the crank, high numbers. Just some thoughts Barry, Have a good evening, how is the baby? Rick Lake

[Barry_R]

If my wallet was a little healthier I'd go to a Honda rod, .866 pin and a compression distance of 1.35. Leaves plenty of room for rings and enough barrel length so its its not too tippy. Remember - I'm a ring/ring seal guy...anyone want to kick in a few thou???

In a controlled rate of RPM gain contest I agree with Kaase when he says that lightweight parts are over-rated. There is certainly some inertia impact, but as Rick noted this is more of a head and cam contest than anything else.

Valvetrain is a real big deal. Spring losses are not as bad as one would think since they release against the cam with the same energy it takes to compress them - less some percentage for heat and friction. I ran .080 3/8 pushrods last year - they will be .130 wall this year - I don't know if the package will fit more diameter... The T&D that is now legal will certainly help stability...I had considerable flex with only four 3/8 studs.