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Old 08-27-2014, 08:57 AM   #1
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Newbie question concerning Horsepower.

We are in the market to purchase a new Entegra . We are looking at Anthem And Cornerstone Atm.. My question is from a "non-towing standpoint. Dose added Horsepower affect fuel economy? 450 vs 600 cummins DP. Curious ...
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Old 08-27-2014, 08:59 AM   #2
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Oh yes forgot... Do one piece fiberglass roofs do well in hail? Or is that something dangerous to all roofs?
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Old 08-27-2014, 09:20 AM   #3
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Horsepower is usually one horse for every 100 pounds of gross vehicle weight however there's another factor that you have to consider and that's torque the larger engines can have more torque which means that they run under less strain usually have a higher gear in the transmission so all in all mileage may go down a little bit but is right and the torque is right you should get good mileage


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Old 08-27-2014, 09:21 AM   #4
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Quote:
Originally Posted by RRDefector View Post
Oh yes forgot... Do one piece fiberglass roofs do well in hail? Or is that something dangerous to all roofs?

Hail is like driving golf balls into the side or roof of your motorhome - not good


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Old 08-27-2014, 09:34 AM   #5
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Lol... Thought so... Thanks...
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Old 08-27-2014, 10:18 AM   #6
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Extra horsepower per se doesn't harm fuel economy, but you have to keep your foot up off the floor. If you use that extra power to accelerate faster and climb hills quicker, it will cost you because the horses have to be fed if they are running hard. Otherwise they stay in the barn and don't cost much.

Hail doesn't have too much effect on fiberglass roofs, but skylights, vents and other rooftop fittings still get smashed if the hail is large enough and hard enough (some hail is slushy). There may be small dents in the fiberglass itself too, but they aren't usually noticeable unless standing on the roof. Of course, any sufficiently large hail stone is gonna break things...
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Old 08-27-2014, 12:08 PM   #7
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Originally Posted by RRDefector View Post
We are in the market to purchase a new Entegra . We are looking at Anthem And Cornerstone Atm.. My question is from a "non-towing standpoint. Dose added Horsepower affect fuel economy? 450 vs 600 cummins DP. Curious ...

It's not so much the HP that affects Milage, it's the heavier coach and the fact that the 600 ISX is a 15 liter engine and the 450 ISL is just under 9 liters. The larger displacement pushing more weight will burn more fuel.


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Old 08-27-2014, 02:15 PM   #8
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Oh yes forgot... Do one piece fiberglass roofs do well in hail? Or is that something dangerous to all roofs?
RRDefector
My one piece FRP, (Filon fiberglass reinforced plastic), roof has survived 2 hail storms that destroyed my A/C shrouds.
One at 10 years of age and one at 16.
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Old 08-27-2014, 02:53 PM   #9
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Vail Pass, Continental Divide!

Well.

You can never have enough power. Anytime I'm going up an 8% grade, I wish I had 1000HP and 4000 fl-kb of torque!

More is ALWAYS better!

Cheers, JohnnyB
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Old 08-27-2014, 03:43 PM   #10
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I run my '09 425 hp Cummins at 1750 rpm, never get over 6.1 mpg per the tachometer. My 350 hp Cummins always provided 7-7.75 mpg. My '09 does have a tag and is 2.5' longer. But I would believe identical units with 450 hp and a 600 hp that the 450 hp would get better mileage.

If you search Cummins site (assuming you are looking at Cummins engines) I have seen the factory expected fuel usage for each of their engines.
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