NHRS kits
Cruiser
Joined: Sep 2010
Posts: 175
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My opinion I would like the aluminum iron lined, for the fact it's considerably lighter and won't stay as hot, thus allowing the motor to last longer and run better. But the cast iron are definitely stronger but will be heavier and run a little hotter
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Road Master
Joined: Aug 2010
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From: Central FL
Tourer
Joined: Sep 2008
Posts: 484
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From: PA
thats little too hot...
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Road Master
Joined: Aug 2010
Posts: 1,039
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From: Central FL
That's what is being reported from the ECU on a Dakota Digital. I'm not sure where it picks it up from, but it's not from the oil tank.
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Ultimate HDF Member
Joined: Mar 2008
Posts: 7,604
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From: Landrum, SC , elevation 986'
Your heads and juggs can easily hit 350ş+ during normal operating temps.
The aluminum juggs would be fine for Florida.
The aluminum juggs would be fine for Florida.
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Banned
Joined: May 2005
Posts: 12,594
Likes: 9
From: Bama
Call the guys at NHRS and tell them how you ride. If you ride your bike hard like most sportster owners do then they will tell you to go with the Axtell. How you ride is much more of a factor than you living Florida.
Ultimate HDF Member
Joined: Mar 2008
Posts: 7,604
Likes: 38
From: Landrum, SC , elevation 986'
Aluminum: 5lbs (each) lighter with better cooling.
Iron: more rigid (less flexing/warping) with better ring seal.
1200/1250 Use the aluminum
88" or 90" may want to consider iron. When you bore the cases for the larger cyls, it gets quite thin. So having a solid cylinder gives it a little more strength.
Here is a quote from Dan @ NRHS:
Our new NRHS iron lined 1250 cylinder have an incredibly thick liner which is almost as stiff as a full cast iron cylinder yet saves about 5 lbs each cylinder and has better heat dissipation. The liners on these are as thick as a stock 883 cylinder to give you an idea. These are what I recommend for a street ridden bike now.