camshaft question

i forgot to tell that's its for a ford 302 engine.

"Håken Hveem" skrev i melding news: snipped-for-privacy@telenor.com...

For what application?

What firing order? The 351W cams will work in the 302 also.

This one is a tad bit wilder than the Crane 260H, a little bit more tame than the Crane 2030.

Look at those & see if the total lift of these is what you're looking for.

As a general rule, at 0" lift (not 0.050") in a small block Ford, a cam with under 260 degrees duration is mild, 260-270 is a little more than stock, 270-280 is versatile and good for all around power, 280-290 is hot, 290-300 is very hot, 300-320 is road race and 320+ is drag race. Valve lift will be from 0.45" on the low end to 0.55+" on the high end.

Rob

standard firing order

"tra>> intake duration: 270

On Fri, 24 Aug 2007 10:45:33 +0200, "Håken Hveem" wrote:

If you are looking at a modified cam, you need to consider the cams with the 351 fireing order. Ford used the alternate fireing order in the factory performance engines like the Cobra and their Motorsport crate engines because of a tendency of cylinders 7&8 to crossfire even in a stock engine. All you need to do to accmmodate the change is swap a couple of plug wires. This will greatly expand your options since most cam grinders only use the 351 firing order for anything other than stock or mild cams. Also, before you start selecting a particular cam spec, you need to decide on exactly what kind of performance you need and what the rest of the drive train components and tire sizes will be. The specs you have given do not consider ramp rates or timing specs beyond generalities. You can also make considerable difference in lift and timing with rocker design ratio. If you are looking at a roller cam setup, you may need entirely different specs for the same application since roller allow greatly accelerated opening rates and lift under the curve. Don't just buy a cam because it sounds good on paper. The cam grinders can be immensely helpful if you will contact them with as much info as possible on what you are working with and what you want it to do. An otherwise decent combination can be completely screwed by getting too aggressive with the cam. It can very quickly go from I wish it had just a little more to I can't stand to drive this thing.

Good luck

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