Technical > Matt Shaff's Engine Shop

4 7 and 4 7 2 3 swap cams

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wideopen231:
anyone know how much gains one can expect from running 4 7 swap or 4 7 2 3 swap cam. Buying custom grind anyway.Its 48* cam for raised cam block,so already paying thru nose and might as well get all I can while spending  money. Not to sure I can g et 4 7 2 3 deal done but 4 7 is not problem.

dreracecar:
I am of the belief that if there was any signifegant gain, you would not have to ask the question and the person grinding the cam would tell you.

 I know some blown nitro guys have tried it, no gains to speak of , but it helps even out the cyl's

Paul New:
I had a 4/7 swap on my blown SBC once  but never had a non swapped cam with that combo. I can tell you it was the best sounding SBC I had ever had, until my latest SBC ;)

wideopen231:
 Do not figure its huge gain. But 8 or 10 hp is a gain. Would fuel car ever know that? Probably not with 10,000 on tap, unless you mean Nostalgia fuel. Now on my piddly  950 to 1000  its a gain. Not huge but they add up.

 No cam grinder yet,which is why I don't know the  4 7 2 3 swap is even a consideration. Comp cams has the 4 7 cores for 48* motor.

wideopen231:
If the only benefit is smoother running engine that's easier on crank.At 3000 for cranks I have its worth trouble.

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