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Old 05-06-2013, 09:40 AM   #1
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2013 Ventana 3634

Thanks NWLanding. We just took delivery of our 2013 Ventana 3634 and I was afraid to look at the 2014's. It looks like we didn't miss anything by not waiting. They built ours on the 2014 chassis anyway.
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Old 05-06-2013, 10:02 AM   #2
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Quote:
Originally Posted by gmpartsvet View Post
Thanks NWLanding. We just took delivery of our 2013 Ventana 3634 and I was afraid to look at the 2014's. It looks like we didn't miss anything by not waiting. They built ours on the 2014 chassis anyway.
I'm jealous! We're a few years away from a purchase but taking the time to do our research, which has shortened our list to Newmar and DynaMax. Have you had your 3634 out on any challenging road conditions (.e.g flat curves, strong side winds, rutted asphalt)? We want a shorter RV so we can take advantage of length restricted state/national campgrounds, but the length to wheelbase ratio on many of the shorter coaches concerns me. I'm sure Comfort Drive mitigates some of the effects, and there's no replacement for adjusting my driving and focus to road and weather conditions. I'm just saying...

Anyway congrats on your new coach I bet your going to love it.

Happy Trails
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Old 05-07-2013, 07:32 AM   #3
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NWLanding-

We just picked it up a week ago and drove it 400 miles home. The tires were overinflated by 35lbs (10 psi over the max tire pressure) by the dealer so we didn't get a true feel but it still drove so much better than my 38' Itasca gas coach. We considered the Ventana 3434 but decided on the 3634 for various reasons, one being the wheelbase to length ratio you mentioned. The 3634 is 22" longer, and so is the wheelbase. Once I deflated the tires I drove it 20 miles and it just floated down the road.
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Old 05-07-2013, 09:37 AM   #4
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Since this is my first RV, I don't have anything to compare to but my 3434 tire pressures are set at 120PSI and the coach does have a tendency to wander. Comfort Drive adjustments don't seem to improve on this.
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Old 05-08-2013, 04:21 PM   #5
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Lass-

Your Ventana has a gvwr of 32,000#, 12,000 front and 20,000 rear. I'm not sure what tires are on yours, but my 3634 has Goodyear G670 RV 275/70R22.5 load range H tires. If you have the same tires and your coach was loaded to the maximum gvwr, the Goodyear tire pressure chart calls for 105 lbs front and 95 lbs in each rear. You won't know for sure until you would weigh your coach to find out how much each tire needs to support. There are many threads here discussing tire pressures and I found that having the correct pressure improved the handling on my previous coach more than anything else I did.
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Old 05-08-2013, 08:10 PM   #6
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lass as John stated you need to get your coach weight at a scales when you have full tank of gas and all your personnel stuff on the coach.
120 PSI is to high and your going to have a ruff ride and possible poor tracking on road surface because of a poor foot print of tires on the road surface.
Your Owners Guide covers the correct way, starting on page 21, to get your coach weight.
The tire tables are in QT's 1 & 2 for both tire companies.
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Old 05-09-2013, 02:44 PM   #7
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My 3634 Ventana was also set at 120 PSI by the dealer and they told me it was the correct inflation. I haven't weighed mine yet either but it will get done next time I'm loaded for a trip. I'm guessing I will be able to lower it a little because I never carry a full tank of water and I'm probably several thousand pounds light of a max load. However, in looking over the inflation charts, I don't see anyway that the PSI should be set at 105#. Perhaps I'm reading this chart wrong and will welcome advice.
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Old 05-09-2013, 04:07 PM   #8
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gmpartsvet / 007 First, yes I do have the same tires as gmpartsvet and agree with your assessments that per the Goodyear tire guide, mine are over inflated. But, as Road Weary, my documentation and dealer PDI state to leave all tires at 120 PSI.

Since this is my first RV, leaving things alone was the easy choice but must admit that I have to try some thing different, so in order to reduce the wandering, I will decrease the pressures to 110 front and 95 rear. That is if I ever get unit back from North Trail. They are certainly not the fastest for minor warranty work.

Thanks for the input.
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Old 05-09-2013, 10:26 PM   #9
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Does the Ventana have a rear or side radiator? And if a rear will the Dutch Star come with a side radiator? My current Winnebago has a rear radiator and I'm hoping my next one will have a side radiator which will allow me to do a lot of the work I'm having to make appointments for the FL shop to do.
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Old 05-10-2013, 02:53 AM   #10
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The dealers are not riding in your coach's you are if you follow the tire mfg tables after getting coach weight you will have a better ride.
When dealers get to coach tires are inflated for unloaded coach the pressures will change after you load your coach.
Tires traveling down the road will also increase in pressure 10 to 15 psi on top of your 120 psi.
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Old 05-10-2013, 08:00 AM   #11
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I came up with my recommended pressures using the chart in the link provided by 007. The front gvwr for our coaches is 12,000#, or 6,000# per tire. The rear is 20,000#, or 5,000# per tire. The chart reads for a single (front) range of 5850# to 6070# inflate to 105#, and for dual (rear) range of 4908# to 5180# inflate to 95#.

Until I weigh my coach loaded and filled with fuel and water this is what I used even though it was built on a 2014 chassis with a 22,000# rear gvwr. I don't think it weighs much more than the 2013 chassis, and I don't have it loaded anywhere near capacity. It's got to be a lot closer than having them overinflated to 135# cold which is 10# over the tire max that the dealer had them set at and it rides and handles great.

The Ventanas have a rear radiator. I'm not sure about the Dutch Stars.
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Old 05-10-2013, 11:21 AM   #12
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To go one step further, if all tires were filled to 120#, that would support a minimum of 6511# for each front = ~13,000# and 6001#for each rear=
~24,000# for a total weight of 37,000#. The coach would exceed the gvwr by 5,000#. If I'm reading the charts wrong somebody please correct me.
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Old 05-10-2013, 12:32 PM   #13
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John, I've looked over the charts and I think you're right. Your numbers make sense and we should be able to reduce our tire pressure. My Ventana is away in storage but I want to recheck the weight label placed on the wall behind the driver's seat. If I remember correctly, it also stated that 120 psi was the right inflation (assuming a full load). I wonder why they would recommend a higher psi than was necessary? I did read on another site with a lean toward safety, to use the inflation range one column higher than actual weight. 007 makes some good points on drivability by reducing psi and I think his years of experience offer lots of credibility.
Gary
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Old 05-11-2013, 01:56 PM   #14
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John your psi for now looks OK until you get coach weight, some people even will add 5 psi on top of that for what they say is a safety factor.
My rear duels are, I am afraid, 10 year Michelins which not many on this forum would ride on.
Had all the tires off a couple years ago when I had a brake recall done and all sides and tread was good for age of tires and side walls no cracking.
The two steer tires I changed last year because of outer tread wear when making turns which is normal for age of tire.
All tires set on plywood when parked, the interior of changed tires were as clean as the new tires mounted.
Many are not comfortable with the aged tires but I have always gone the limit with mine weather Goodyear or Michelin's.
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