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ContinuousWave: Post-Classic Whalers
Towing a Post-Classic, applying the GCWR
|Author||Topic: Towing a Post-Classic, applying the GCWR|
posted 10-10-2004 04:57 PM ET (US)
After reading some of the tow information regarding the 170 Montauk, I have two questions: (Plus it's rained for four days straight and I've got cabin fever.)
1) How do you personally add up all of the weights for the different ratings, I want to know what you think and
Boat being towed: 170 Montauk, 2003 version with 4-Stroke 90HP Mercury, bimini, two anchors, one battery, 26 gallons of fuel and an EZ-Loader trailer with spare mounted on tongue and hydraulic vented disk brakes.
Tow vehicle: 2002 Tacoma Truck regular cab, manual, airconditioning, fully fueled. Add ons: bed mounted over the rail aluminum tool box, 2" receiver hitch.
Travel items: Two average adults in cab. Two full suit cases, 50 cases of beer, cooler of food, small box of tools, 12volt air pump, hydraulic jack, 3 fold up chairs and 8 foot by 8 foot fold up canopy. Loaded for bear.
posted 10-10-2004 06:07 PM ET (US)
Your "empty" Tacoma can tow 3500 pounds.
If you add all the "stuff" you mentioned you are hovering around 3500 pounds which is at the maximum weight your Tacoma can safely tow.
posted 10-10-2004 06:09 PM ET (US)
It can be done, but personally I'd want a 6-cyl to tow a Montauk. I'm towing my 130 with a 22RE and feel it's just about right. You've got a little more truck than me, but that's a lot more boat.
If the launch ramp is a short, flat trip, it should be fine. But if there are any hills involved, you'll want a bigger truck. Opt for the 150 if replacing the truck isn't an option. You can't fit more than 3 people in a regular cab anyway, and the 150 is roomy for 2 and perfect for 3.
YMMV, of course. Hope that helps.
posted 10-10-2004 07:35 PM ET (US)
You don't try to add it up. You gas up both truck and boat, load 'em exactly the way you'll tow 'em, and take 'em to a certified scale that has separate pads for steer, drive, and trailer axles. After you weigh the whole rig, unhook the trailer and take the truck back across the steer and drive axle pads. That'll let you calculate the tongue weight.
posted 10-10-2004 07:38 PM ET (US)
Here is some more info. I got these definitions from Trailer Life Magazine
TOW RATING -- The manufacturer's rating of the maximum weight limit that can safely be towed by a particular vehicle. Tow ratings are related to overall trailer weight, not trailer size, in most cases. However, some tow ratings impose limits as to frontal area of the trailer and overall length. Tow ratings are determined by the vehicle manufacturer according to several criteria, including engine size, transmission, axle ratio, brakes, chassis, cooling systems and other special equipment.
GCWR (Gross Combination Weight Rating) -- The maximum allowable weight of the combination of tow vehicle and trailer/ fifth-wheel, or motorhome and dinghy. It includes the weight of the vehicle, trailer/fifth-wheel (or dinghy), cargo, passengers and a full load of fluids (fresh water, propane, fuel, etc.).
posted 10-10-2004 07:40 PM ET (US)
Moe, But I can exceed my GCWR and not my tow rating right? I think I need to get rid of some of the beer in the bed. ;) Jim
posted 10-10-2004 08:15 PM ET (US)
Towing capacity isn't a rating. It's what you have left for a trailer after subtracting the vehicle's actual weight from its GCWR. If your vehicle's actual weight is greater than that the manufacturer uses to calculate the MAXIMUM towing capacity, then YOUR towing capacity is less than the maximum.
Toyota's assuming an actual truck weight of 3200 lbs when they calculate 3500 lbs maximum trailer weight. With a 2750 lb curb weight, that's only 450 lbs for options, gas, and people in the truck if you want to tow 3500 lbs. Not much.
The maximum the truck can weigh (its GVWR) is 4250 lbs, including tongue weight. Loaded to 4100 lbs with an additional 150 lbs tongue weight, that leaves 6700 minus 4100 = 1600 lbs maximum trailer weight (including the tongue weight). Not even enough for a well-loaded 150 Sport.
posted 10-10-2004 08:54 PM ET (US)
Moe, You scared me. I hope you are 1000 lbs off. Should be 2600 lbs versus 1600 lbs.
So hypothetically it would go like this:
Start with the tow vehicle,
GCWR of tow vehicle is 6700lbs. So 6700 lbs less 3596 lbs of tow vehicle which leaves 3104 lbs that I can tow, things on the boat and trailer.
I am really close I think. Jim
posted 10-10-2004 09:08 PM ET (US)
Yep... I made a 1000 lb math error.
When subtracting the truck weight from GCWR to get the max trailer weight, don't include tongue weight in the truck weight. 6700 minus 3400 lbs truck weight would leave you 3300 for the boat, motor, and trailer, with gear, etc.
You WOULD include tongue weight in the truck weight when subtracting from GVWR to make sure you aren't exceeding that.
posted 10-10-2004 09:11 PM ET (US)
So WT, with your numbers I would add 3546 lbs to the dry curb weight of the truck at 2750 lbs for a total of 6296 lbs. This is within the GCWR of 6700 lbs. Jim
posted 10-10-2004 09:14 PM ET (US)
Thanks Moe, gotcha. Jim
posted 10-10-2004 09:48 PM ET (US)
The real question isn't whether your tow vehicle can pull the load, but can your tow vehicle can stop the load.
I think your tacoma coupled with your trailer brakes is more than adequate. The stopping question is probably the most overlooked aspect of towing. The Tacoma has a ~140 HP engine with a long stroke and gobs of torque. This is perfectly adequate for towing almost anything. You really only need a fraction of that horsepower to achieve highway speeds.
As you may already know, I tow a very similar package with a very well broken-in 2WD, 22RE, 5 speed tacoma. I have never had a problem getting to and maintaining highway speeds (55-60 MPH). As for ramps, the only issue is traction with 2WD and wet surfaces. A couple of people adding ballast to the bed usually helps.
Just an estimate...data for calculation collected from google
Gallon of water = 8.34 lb
posted 10-10-2004 10:04 PM ET (US)
Maximus, You win the prize! I was hoping to discuss how many beers I could carry in the truck's bed and stay within the GCWR. I've already got 60,000 miles on the Tacoma and love the 26 mpg solo. It's here to stay. Jim
posted 10-10-2004 10:43 PM ET (US)
My tacoma get 26-27 mpg with normal driving. My father's new tacoma (2003) 4 cylinder automatic only gets ~20 mpg.
posted 10-10-2004 10:46 PM ET (US)
For someone else to figure out....
Can you fit 50 cases of bear (cans) in a 6 x 5 bed with wheel wells?
posted 10-10-2004 10:48 PM ET (US)
Wow that must be a PreRunner.
posted 10-14-2004 12:41 PM ET (US)
My last truck was a Tacoma 2wd 4 cylinder 5 speed. Great truck and a perfect match for a 170. If I didn't have a 9000 pound travel trailer I'd be towing my 170 with one.
posted 10-14-2004 05:19 PM ET (US)
Jim, if I had known you had that much beer I would have stayed under your tent more in orange beach.
posted 10-14-2004 05:23 PM ET (US)
We always bring a case per person per day. That way we don't run out til middle of the second day.
posted 10-14-2004 05:54 PM ET (US)
Jeff, I can vouch for your ability not to run out. ;) Jim
posted 10-14-2004 07:15 PM ET (US)
I just realized Maximus figured 16oz beers. They get hot too quickly down here. So someone please recalculate! With 12oz beers it's 985lbs for 50 cases.
GCWR of tow vehicle is 6700lbs. So 6700 lbs less 3596 lbs of tow vehicle which leaves 3104 lbs that I can tow, things on the boat, in the bed and trailer. If we use AQUANUT's real numbers of 2250 lbs and add 100 lbs for grins that leaves only 754 lbs for beer. Somewhere around 38 cases.
posted 10-14-2004 10:01 PM ET (US)
It's going to be a long winter.
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