Technical > Matt Shaff's Engine Shop
4 7 and 4 7 2 3 swap cams
Frontenginedragsters:
It seems like in our industry whats new is really old just re-packaged.
Yes Ford did the same thing in 1969 when the 351W engine came out.
Ford changed the firing order to even things out.
The 4-7 swap was not used when I was a nitro crew guy but it became standard many years ago.
My two oldest sons work on Tim Wilkersons nitro F/C so I keep up thru them.
Now the 4-7-2-3 is the norm. It gave them a couple of extra runs on a crankshaft.
The guys to ask about HP would be the Pro-Stock or Comp guys as mentioned already.
I think for what most of us are doing the benefit would be not noticeable.
That's my offering.
Matt Shaff
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