compression and cams, help!
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Cruiser
Joined: Aug 2008
Posts: 211
Likes: 0
compression and cams, help!
I would like to upgrade to a better cam than the stocker, which is only 195 degrees at .050 from what i understand. I have a 2008 roadKing with Jackpot mufflers, thier good aircleaner, and a power commander 3 so far, but woulod like to improve the low speed torque and midrange some more if possible.
Does the stock motor have room for a thinner head gasket to improve quench and compression? Do i need to cut the heads a bit when i remove them for a bit of head work to go with the cam? Any cam in the 1800 to 4800 to 5000 rpm range is what i want to consider.
My cam choices are going to be in the .500 lift range, roughly 218 to 225 intake duration , a bit more on the exhaust. I don't rev my bike much over 5000 rpm so i want to really build the low end / midrange to its optimum. Greg
Does the stock motor have room for a thinner head gasket to improve quench and compression? Do i need to cut the heads a bit when i remove them for a bit of head work to go with the cam? Any cam in the 1800 to 4800 to 5000 rpm range is what i want to consider.
My cam choices are going to be in the .500 lift range, roughly 218 to 225 intake duration , a bit more on the exhaust. I don't rev my bike much over 5000 rpm so i want to really build the low end / midrange to its optimum. Greg
Road Captain
Joined: Jul 2007
Posts: 579
Likes: 3
Don't know about the head and gasket stuff, but I went with Andres 37G cams and love them. Good low end torque that begins around 1800 RPM. Changed the exhaust to something more traditional as well. Best modifcation I made to the bike.
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
Check out the Woods 6 series of cams lots of bottom end. As far as head work: check out some of the sponsors, they have head work starting around $300 and up. The primary areas of importance for the street are the bowl area under the valves, the valves themselves, and port matching. Try to keep the compression ration under 10-1 to minimize detonation. Hope this helps.
Road Captain
Joined: Nov 2007
Posts: 697
Likes: 1
From: Just west of Tahoe
I'm runnin Andrews 37H cams and I don't really think the torque comes on to around 2200. But I'll tell you what - between 3k and 5.5K those cams roll!
Road Captain
Joined: Sep 2006
Posts: 749
Likes: 2
The big bore kit (103") will improve low/mid range torque much more than any cam.
As with cars, there is no substitute for cubic inches...
As with cars, there is no substitute for cubic inches...
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Grand HDF Member
Joined: Sep 2007
Posts: 4,122
Likes: 44
From: Boise Idaho
There is quite alot of clearance, Head Quarters has a special set of pistons for the 96's because the stock pistons don't come all the way to the top of the cylinders.
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