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Old Mar 1, 2011 | 03:05 PM
  #1  
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coronerrpm
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Default New cam questions

I managed to save up some coin for a cam swap. Looking at the Woods-555"s. The motor is stock 96" with 4K miles other than V&H big radius 2into2 with BCT baffles, PC-5 and SE air with K&N filter. I may do a 107 kit down the road but at this point it will have to wait. I know the 2 into 2 will lose some hp/tq but I like the look and sound of them so they are staying also at this point.
OK, Here are a few questions.
(1) Do I go with the 4 degree advance key for this set up? What are the benefits?
(2) what kind of real numbers/gains can I expect? I had it dyno'd last fall and got 70.83HP and 85.44TQ with above stuff.
(3) Just how bad of a job is it to do? I build race motors (car) in the past, 20 some yrs ago so I think I can wing it with no problem but do not know squat about these HD motors. I was looking at a kit from Fuel Moto that includes everything including adj push-rods and remap.
Sorry for the questions and thanks 4 your input.
 
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Old Mar 1, 2011 | 06:56 PM
  #2  
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Originally Posted by coronerrpm
I managed to save up some coin for a cam swap. Looking at the Woods-555"s. The motor is stock 96" with 4K miles other than V&H big radius 2into2 with BCT baffles, PC-5 and SE air with K&N filter. I may do a 107 kit down the road but at this point it will have to wait. I know the 2 into 2 will lose some hp/tq but I like the look and sound of them so they are staying also at this point.
OK, Here are a few questions.
(1) Do I go with the 4 degree advance key for this set up? What are the benefits?
(2) what kind of real numbers/gains can I expect? I had it dyno'd last fall and got 70.83HP and 85.44TQ with above stuff.
(3) Just how bad of a job is it to do? I build race motors (car) in the past, 20 some yrs ago so I think I can wing it with no problem but do not know squat about these HD motors. I was looking at a kit from Fuel Moto that includes everything including adj push-rods and remap.
Sorry for the questions and thanks 4 your input.
I'd suggest the 4* advance sprocket to bring it in sooner, and once you go to the 107",(pull the 4*) set the compression at 10.5, and get a head on it, that'll roll off 165 cfm @ 10" @ .600 lift.
How much power now?? I'd guess a FAT 10/10.
How much after the 107"/headwork?? That'll go 110 hp, 125 ft/lbs.
Scott
 
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Old Mar 1, 2011 | 07:05 PM
  #3  
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Originally Posted by coronerrpm
(1) Do I go with the 4 degree advance key for this set up? What are the benefits?
Advancing the cam closes the intake valve sooner after bottom dead center thereby reducing the amount of the induction charge that gets lost back up the intake tract. The net result is more a/f mixture to ignite. Higher dynamic compression and in the end, more low end torque. It's a great option as long as you're not pursuing high RPM horsepower.

Todd
 
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Old Mar 1, 2011 | 09:14 PM
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So is it safe to say 15 to 20 hp gain by doing the cams? Or is that asking alot?
 
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Old Mar 2, 2011 | 05:44 AM
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As I made mention, a FAT 10/10 gain minimum. Might touch on 15, maybe.
Scott
 
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Old Mar 2, 2011 | 08:45 AM
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It's a simple job to pull the heads and do the .030 head gaskets, it will bump the compression about .25:1 and you can reuse your stock pushrods and save the cost of adjustables. Advancing them +4* is a good idea also, I did it with my 37's and I really like how my bike responds now.
 
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