1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year > 1965 Shelby

289 k code question

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m.b.spuur:
Hello. Is there some one there know What the camshaft specifications was On the shelby 350 289 k code
Thanks. Mike

jwc66k:
The cam was the same as all "K" code engines. All I have is from "The 289 High Performance Mustang" -
Ford Service p/n, C3OZ-8250-C; intake duration - 310deg; exhaust duration - 310deg; lift - lobe, 0.298in; lift - valve, 0.460in; overlap 82deg; marked, EA (mirror image,inverted).
Jim

Bob Gaines:

--- Quote from: jwc66k on November 13, 2019, 08:04:55 PM ---The cam was the same as all "K" code engines. All I have is from "The 289 High Performance Mustang" -
Ford Service p/n, C3OZ-8250-C; intake duration - 310deg; exhaust duration - 310deg; lift - lobe, 0.298in; lift - valve, 0.460in; overlap 82deg; marked, EA (mirror image,inverted).
Jim

--- End quote ---
+1  . K code cam is the same as in regular production 65-67 GT350  .

Bossbill:
You can't use the specs listed above to compare to any cam today because it's not at the industry standard of .050 lift.
Why? Because it hadn't been set as an industry-wide standard at the time.
The specs are set for .100 lift.

As explained in this article:
The original 289 HiPo cam (PN C30Z-6250-C) had 310 degrees advertised duration (194 degrees at .100-inch lift) with a .460-inch total lift at the valve and lobe separation angle of 114 degrees. The problem with comparing modern cams with those from the ’60s is that SAE hadn’t implemented the standard .006-inch valve-lift spec for advertised duration, and Ford didn’t list duration at .050-inch lift, which is today’s most-used comparison tool.
“The 194 at .100 is more in the 224-234 at .050 range,” estimates Godbold.

Edit due to copy/paste failure.

jwc66k:

--- Quote from: Bossbill on November 13, 2019, 09:12:07 PM ---The problem with comparing modern cams with those from the ’60s is that SAE hadn’t implemented the standard .006-inch valve-lift spec for advertised duration, and Ford didn’t list duration at .050-inch lift, which is today’s most-used comparison tool.

--- End quote ---
So, how does this apply to an original 1966 cam as installed in a "K" engine?
Jim

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