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Old 08-17-2008, 08:45 AM   #1
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I am looking to purchase a 2005 34 ft Alpine Coach.

I have heard rumors that this length of coach (with the 400 engine) may be prone to porpoising.

Would appreciate any infor on this.-----Is it fact or fiction?

Thanks,

Ron Clarke
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Old 08-17-2008, 08:45 AM   #2
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I am looking to purchase a 2005 34 ft Alpine Coach.

I have heard rumors that this length of coach (with the 400 engine) may be prone to porpoising.

Would appreciate any infor on this.-----Is it fact or fiction?

Thanks,

Ron Clarke
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Old 08-17-2008, 10:02 AM   #3
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I have a 2006 34'. Drives like a dream. Has never done any porpoising.
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Old 08-17-2008, 01:51 PM   #4
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Hi Ron, welcome to the forum!

We've got a 2004 34 footer with the 400 Cummins and it also drives like a dream. No porpoising.

Best of luck!
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Old 08-17-2008, 04:35 PM   #5
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An Alpine porpoising?

An urban legend propogated by Alpine-Owner Wannabees.
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Old 08-17-2008, 04:58 PM   #6
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We have a 2005 - 34 footer that drives as everyone else describes. I changed the Bilstein shocks to Kone's because Danny Gayhart was kind enough to get us a great deal at 17000 miles as a lot of us did and it improved the coach quite a bit but had I not I would have never missed them. I would be more apt to think a longer based coach would have a tendency to porpoise but obviously none of them do.
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Old 08-17-2008, 09:13 PM   #7
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No porpoising on my 36' MDDS with the 400hp engine either. (I know you asked in particular about the 34'.) I agree with Ted, it is better with the Koni shocks in place of the Bilsteins, but was not bad before. Driving it will be the least of your worries.
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Old 08-18-2008, 08:15 AM   #8
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Ron, I Have driven a 34-foot twice over 1000 miles
over Hwy 395 from LA to Junction City Oregon. If a salesman tells you they porpoise. He's trying to sell you something else. Alpines have a 60-40 weight distrubution 40% on the front axel. Most other brands are 80-20 in this length.
The 36 will give you a little better ride the reason is the longer the wheel base the smoother the ride. Alpines 34 has a 217" wheel base versus a 252" wheel base through model year 06 in 07 they dropped it to 242" to accommodate a wider door and smartbeds.

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Old 08-18-2008, 12:13 PM   #9
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We started to get some porpoising on our 06 36 footer. Solved the problem w/new Bilstein shocks on a new coach. Maybe I coulda solved that cheaper w/new shocks on the old coach?? Hmmm...
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Old 08-18-2008, 12:27 PM   #10
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I have a 2003 34 FDDS and have never had a porpoising problem and I typically am towing a boat or enclosed trailer with 500lbs of tongue weight which I would imagine would make it worse if it existed.
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Old 08-18-2008, 01:16 PM   #11
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Lindsay,

The 34's all have a 217' wheel base, the 36's changed from 252" to 242" on the SE's to accommodate the wider entry door. My 2002 34, did wander some and was blown around in the wind when I got it. I changed the tires and had the caster in the front end increased, which cured these problems. The factory cured those problems by adding weight to the front end. I am not sure what year they started this and think I was told it was about 500 to 700 lbs. For a shorter length coach, the Alpine 36, up to the SE's, have the best wheelbase to length ratio of any coach made. The wheelbase to length is a major factor in handling.
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Old 08-18-2008, 07:52 PM   #12
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We have a 2006 36 MDDS Limited, before the SE, and I would have to agree with DGerstel, porposing is definitely not an issue with our coach. It is really smooth and sweet handling. We did replace the Bilstein shocks with Konis at around 20,000 miles and now have 30,000 miles. The Konis helped a little, but porpoising was never a major issue, and it's great with the Koni's.
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Old 08-19-2008, 06:24 AM   #13
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2005 34'Alpine Limited.Absolutely NO porpoising.Great coach, ride,performance,storage and quality.It is disturbing to read about various problems but it is no different than all the other highline coachs.Just read some of the Country Coach,Monaco,etc.problems.
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Old 08-19-2008, 06:39 AM   #14
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by work2play:
I have a 2003 34 FDDS and have never had a porpoising problem and I typically am towing a boat or enclosed trailer with 500lbs of tongue weight which I would imagine would make it worse if it existed. </div></BLOCKQUOTE>

Ditto, and I have ~900lbs...
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