Harmon Collins "Offy Grind" Flathead Cam?

[svm99]

I've heard of this cam talked about from time to time (not on here though). Does anyone have specs on such a cam made by Harmon Collins?

I've never found any listings in some HC spec sheets I have.

Thanks Paul.

[Pete]

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Originally Posted by svm99

I've heard of this cam talked about from time to time (not on here though). Does anyone have specs on such a cam made by Harmon Collins?

I've never found any listings in some HC spec sheets I have.

Thanks Paul.

I didn't know H&C did any Offy grinds but it is very possible.
They are radius lifter type grinds so would likely only be used in all out race engines.
They were originally designed and made by Ed Winfield for Meyer Drake.
The short track version is very similar to the Isky 404A and lifts .415.
It is called the #4. The long track version is the #5 and lifts .480. It requires boring the camline out.
There were several other grinds for the 270 Offy but were just refinements for certain tracks or conditions.
I have run both of these grinds in flathead V8's and the #4 in a model B engine.
I can grind both of these and furnish the radius lifters for both the V8 and the 4 banger.