camshaft 4-7 swap

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09-10-2009 | 02:38 AM

#21

bob

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Joined: Oct 2000

Posts: 1,255

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From: Cape Coral, FL

Double swap firing order is 1-8-7-2-6-5-4-3

09-10-2009 | 06:53 AM

#22

ezstriper

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Joined: Nov 2005

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From: Fredericksburg, Va

the swaps are more for taking some of the load off the cranks, 632's are bad for breaking cranks, with the double swap seems to help that issue and pick up a few HP on the dyno, but I would not waste my $ just looking for more HP in a normal boat app. Rob

09-10-2009 | 03:51 PM

#23

formula 382 sr-1

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Joined: Dec 2006

Posts: 2,494

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From: Chesapeake Bay

Yup ,We are running a RM builder cam with a 7-4, 3-2 swap
BAD AZZ !!!!!!!!

09-10-2009 | 04:52 PM

#24

scarrab30

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Joined: Oct 2004

Posts: 161

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From: franklin,Tenn.

I run a 4-7 swap. I don't think its worth doing. I only picked up 5lbs torque and 4hp. I did it more for harmonics and crank life.

09-10-2009 | 09:06 PM

#25

vette131

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Joined: Dec 2003

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From: Slidell,La

Quote:

Originally Posted by bob

Double swap firing order is 1-8-7-2-6-5-4-3

this firing order is the same as fords 13726548 due to fords numbering system start at 5 & follow the firing order through the cylinder layout & you get the same sequence.