Thread: Engine Upgrade

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Hey - Its beginning to make sense now.
Well - at least understand one more cam parameter -

My curiosity was aroused when the 283 cam question came up a while back and a 327/350 cam was suggested:

Part # E903= 223/223, 447/447, 114 Street/strip .4bbl,headers
almost identical to the 327-350 cam

But prior to that I had read of 270-284 duration cams more than any other specification. How can a 'lowly' 224 Dur cam be worthy.

It must have to do with the peak operational RPM you eluded to:

techinspector wrote - What you need to know is that with any cam you choose, it has a "window" of operation in which it will be efficient. That window is about 3,500 rpm's . . .
... If you install a cam with a long duration, it's going to have the characteristics of being efficient in a window of operation that will be too high on the rpm's to do you any good on the street

Bert