Any guesses ????
Road Warrior
Joined: Jan 2008
Posts: 1,995
Likes: 2
From: Land of 10,000 lakes
So I dropped the bike off. I specifically asked why he wanted to deck the heads vs doing pistons. His answer was that it allowed him to control compression. He wanted to be in the 9.7 - 9.8 range. He said that there wads less chance of ping and that if you get somewhere that you can't get hi octane gas it would run better.
Road Master
Joined: Jun 2010
Posts: 757
Likes: 4
A good engine builder will/should ask what you want, what your budget is and make suggestions based on other builds they've done and had success with.
That basic build info should roll off his tongue. I think you have too many Chef's in the kitchen on this one and they're not in the same shop. Head guy, dyno guy and assembly guy will all point fingers at each other when it doesn't work out as planned.
My 2 cents..........
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Road Captain
Joined: Jul 2012
Posts: 633
Likes: 4
From: missouri
And I can appreciate it.......
There's always those guys that know everything, their way is the only way, that are so smart they consult with know one...
By the way, I'm in health care... Doctors always consult with specialists and get second opinions. There is something called the health care team ...
There are also people thar sit around and look for negative things to say about other people.
The good news I feel sorry for them but thats about it because I certainly don't care what they think.
There's always those guys that know everything, their way is the only way, that are so smart they consult with know one...
By the way, I'm in health care... Doctors always consult with specialists and get second opinions. There is something called the health care team ...
There are also people thar sit around and look for negative things to say about other people.
The good news I feel sorry for them but thats about it because I certainly don't care what they think.
Road Warrior
Joined: Apr 2009
Posts: 1,258
Likes: 114
From: Jackson, Ohio
I hope your bike runs great afterwards and I don't mean to bust your chops but I hate to see you end up with something that constantly needs attention.
I have a friend that did the exact mods as you (except cams) to a '12 CVO SG and he is constantly fighting a hiccup or miss.
Correct pistons (many aftermarket pistons available for any compression you desire) and head work would be a preferred method for my bike.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,241
Likes: 7
From: Daytona, Fla.
No serious guess on final numbers, but I took a look at the 570 cam specs. versus the cams I've used. I usually don't like to push the lift numbers for a road bike much over .520, but .570 isn't bad. Duration & overlap are reasonable, so I don't see any real problem. Mike's right about angle changes when decking the heads, but it's a pretty small change. You might experience some intake leaks, but usually you can cure them by puttin' a little gasket sealer on the new intake gaskets. Since your builder is tryin' to keep compression below 10:1 you should have a real rideable bike. I have a 10.5:1 that is rideable....if you want to go fast. Not so much in school zone traffic.....<shrug> It's your bike, build it your way. & let us know how it comes out.
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