Andrews 21H or 26H for 09 Dyna
Road Captain
Joined: Aug 2009
Posts: 619
Likes: 3
From: In Garage
Correct me if I'm wrong, but doesn't this cam increase the dynamic compression of the engine by a earlier intake closing? Similar to the SE255 cam??
Which of course is a good thing, BUT in my opinion you would be happier with a 26h.
and even more happy with the 26h and a 0.030 head gasket. BTW what is stopping you from getting the 0.030 head gasket?
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Cruiser
Joined: Apr 2009
Posts: 141
Likes: 0
From: Central Maine
Read the article, Feb. issue of American Rider if you can still get that issue. Joe Minton has a good explanation of this cam. Wouldn't it make sense that a cam that makes good low end torque to move a heavy bike will really get a light bike going in a hurry? I think so. These bikes are geared so high that when cruising the engine is spinning pretty slow which is where this cam makes great torque. If I was going to race people and spend alot of time at high rpm's I would stick with my Red Shift 575's, But I don't. I do alot of easy cruising through the hills and mountains of Maine. That article has me convinced that this cam is just what I need.
Another example, Big truck engines produce alot of torque down low just off idle to get it moving with a heavy load. When my truck is empty it's like a hot rod, all that torque but not much weight anymore. When you get up to speed and the torque starts to fall off, now the horse power is right up there working for you.
In the case of our bikes, the gearing is so tall that you can always keep the engine in that low to mid rpm range ( 2000-4000) where it likes to be, or I should say where I like mine to be.
What do you guys think? Is this a reasonable train of thought or should I have my head checked?
Another example, Big truck engines produce alot of torque down low just off idle to get it moving with a heavy load. When my truck is empty it's like a hot rod, all that torque but not much weight anymore. When you get up to speed and the torque starts to fall off, now the horse power is right up there working for you.
In the case of our bikes, the gearing is so tall that you can always keep the engine in that low to mid rpm range ( 2000-4000) where it likes to be, or I should say where I like mine to be.
What do you guys think? Is this a reasonable train of thought or should I have my head checked?
Grand HDF Member
Joined: May 2008
Posts: 4,624
Likes: 189
From: Newcastle, Ca.
You are right - tq gets the bike moving. And you are 100% correct in picking a cam that fits "your" riding style and budget. Lots of people over cam bikes, but either dont realize it or admit it. And, just because some cams get higher numbers than others does not mean they are a good choice. Like you said, its the rpm range thats important. I will pm you a link with lots of in depth, riding discussions and comparisons about the cams mentioned.
Also, not trying to convince you 21's are right, definitely not sayin they are wrong. Take your time, research and decide what fits "your" riding style, build and budget.
Oh, and dont ask if you need your head checked. Those who disagree with you will certainly answer that question! lol
Also, not trying to convince you 21's are right, definitely not sayin they are wrong. Take your time, research and decide what fits "your" riding style, build and budget.
Oh, and dont ask if you need your head checked. Those who disagree with you will certainly answer that question! lol
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Cruiser
Joined: Apr 2009
Posts: 141
Likes: 0
From: Central Maine
I guess I left myself vulnerable to all the comedians with the head check comment lol! Seriously though, everyone is so happy with the Andrews 26H but the only big difference between the two is that the 21h starts making good torque 600-800 rpm earlier than the 26H. The 21h may fall off that many rpm earlier way up at the top of the rpm range, but who cares about the top end if you spend very little time there. Atleast that's how I'm thinking anyway.
Road Warrior
Joined: Jun 2007
Posts: 1,788
Likes: 4
From: Here
IMO, you will be happy with either one of them and probably wouldn't really notice much seat of the pants difference between the two since they are pretty close on their specs. Either will bring on torque earlier than those 575s you have now.
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Wood 6, clip the heads .070", with .030" gask. That simple. May pick the tire on an aggressive 1-2 gear change.
That'll make you no longer wonder. Power from off idle to 5500.
That SMOKE the 21/26 cam set-up. All advice from what we've seen.
Just trying to steer you in the right direction.
Scott
That'll make you no longer wonder. Power from off idle to 5500.
That SMOKE the 21/26 cam set-up. All advice from what we've seen.
Just trying to steer you in the right direction.
Scott
Road Captain
Joined: May 2007
Posts: 573
Likes: 7
From: Florida
On Doc's recommendation . My cousin was sent to JD's with an 09 King. Air cleaner kit , Mufflers and a Andrew's 26 cam .
With the proper tune , and tuner divice ...... It got him 84/94 SAE . I believe thats the best bang for the buck !
With the proper tune , and tuner divice ...... It got him 84/94 SAE . I believe thats the best bang for the buck !
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Cruiser
Joined: Apr 2009
Posts: 141
Likes: 0
From: Central Maine
Thanks Kumaride for the info, and to Scott at Hillside I would like to do all the things you suggested but I don't have a good place to do the work and would have to pay to have the heads pulled and the labor bill would be more than I want to spend right now. Like 07roadhawg said the specs on the 21H and 26H are very close, with the 21H pouring on the torque a few hundred rpm earlier at the expense of some top end. I admit the dyno chart probably won't look impressive for this cam but I bet on the road it will perform well. Not to many people are doing low fourth gear to redline rollons as depicted on a dyno chart.
Is there any reason why this would be a bad cam choice for a lighter bike like my Fat Bob? We can all use low end torque in all gears right?
Is there any reason why this would be a bad cam choice for a lighter bike like my Fat Bob? We can all use low end torque in all gears right?
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
It's not just where the tq starts it is also where it stops then you have to shift, guess what happens everytime you pull in the clutch, you disconnect the engine from the rear wheel and the horsepower/torque stops being transmitted to the rear wheel. If it was all about low end tq we would all have diesel engines and 15 speed transmissions in our bikes. All cams work the same, they control the valves and there is no magic cam that fits all they all have compromises and the trick is to find the best compromise for you. How do you ride , what are your goals with a new cam?