Super Charged Slant Six
Frank and Tom,
Thanks for the kind words, but I totally missed something that is very important, because I am
really ignorant about mathematical relationships as regards diameter versus area. I failed second year Algebra TWICE, if that gives you any idea of my shortcomings....
Here's the deal: Some of you may have already figured this out...
Though the DIAMETER of the 2.02" Chevy valve in the Z-28 head is only (as reported) 15 percent larger that the /6's oversized 1.75" valve, if you
do the math and calculate for valve AREA (instead of simply the diameter,) the fact is, the Chevy 2.02" valve
AREA is
THIRTY THREE PERCENT LARGER than the area of the 1.75" /6 valve.
Like I said, BOTH engines have 39 cubic inches per cylinder...
Such are the
wages of the small bore /6 design, and resultant small valves, even taken to the max (without going to "heroic measures.")
I missed that
completely, so there goes my A+.... just like in school...:cwm10: Who am I kidding; with a performance like that, I'd be lucky to get a "D"....
If you're interested, the difference in the
area of the 1.5" (
oversized /6 exhaust valve,) and the STOCK Chevy Z-28 1.6" valve is 14 percent.
I apologize for the confusion...:banghead:
I only point this out to try to illustrate how REALLY small the /6 valves are in relation to another engine wwhich has reasonably-sized valves due to the large-bore valve size capability.
I think that forced induction can make an end-run around this problem, and Ryan Peterson's car, along with Tom Wolfe's equally powerful turbo'd /6 are proof of that.
Thanks for listening!
