Towing an Escape 21: 4Runner or Tacoma? - Page 3 - Escape Trailer Owners Community

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Old 02-24-2014, 06:17 PM   #21
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On my old Chevrolet Tahoe I was concerned with transmission temperature, so I bought a guage and a A-pillar pod , the only pillar pod available was a double guage one so I thought what other guage should I get? Well I got a Engine oil temp guage , Just to fill the hole. Well to my surprise the transmission temps were never a concern But holy smokes did I get a education on engine oil temperatures. The moral of the story is a trans temp guage is a great idea before you get all concerned about something that may not even be a concern.
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Old 02-24-2014, 07:54 PM   #22
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Excellent idea to add a gauge. I really wanted one, the problem was my model of Toyota 4Runner did not support a gauge monitoring transmission temperatures. These gauges work with the user programming in a code for the specific item they want to monitor. Each manufacturer and model has different codes. I cannot recall the exact reason but it was not a missing code, it just had not been built into that model of 4Runner. Hey folks this is a ten year old car, maybe they have been improved.

Scan gauge was one and I think the other was Ultra Scan.
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Old 03-01-2014, 07:52 PM   #23
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Here's a less wordy question

After thinking through the informative answers to my overly verbose initial question, I invite your thoughts on the essential issue:

Two identical Escape 21-foot trailers are at the bottom of a five-mile 8% uphill grade on a two-lane highway which has been closed to other traffic.

One is hitched to a Toyota Tacoma V6 generating 236 horsepower and 266 foot-pounds of torque, and with a tow rating of 6500 pounds (SAE J2807 compliant).

The other is hitched to a Toyota 4Runner V6 generating 270 horsepower and 278 foot-pounds of torque, and with a tow rating of 5000 pounds (SAE J2807 compliant).

Both vehicles are in perfect mechanical condition, and are controlled by equally competent drivers.

If both trailers are towed up the grade at as close to the posted speed limit as possible, using optimal gear selections and RPM range, which tow vehicle and trailer will arrive at the top first?

Bonus question: Estimate how much sooner the quicker TV and trailer will arrive at the top:

a) slightly
b) significantly
c) dramatically.

Thanks!
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Old 03-01-2014, 08:08 PM   #24
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Were you a math teacher Brent?
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Old 03-01-2014, 09:10 PM   #25
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No, but I labored through enough math courses to know how the instruments of torture are worded.
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Old 03-01-2014, 09:20 PM   #26
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Not going to touch the question but I suspect one of the factors in the different tow ratings is the curb weight of the two vehicles. A SUV on a similar platform as a truck will have a
Significantly higher curb weight due to all the steel, glass and interior trim . My Yukon is around 1000 lbs heavier than a pick up truck and I drive both models on a regular basis and you can defiantly can feel the extra weight
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Old 03-01-2014, 09:29 PM   #27
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You're right, Dave. The 4Runner's curb weight is 473 pounds more than the Tacoma with a tow package, which accounts for about 1/3 of the difference in rated tow capacity.
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Old 03-01-2014, 09:32 PM   #28
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In the US, the 4 Runner is rated for pulling 4700 lbs. the horsepower is 270 and the torque is 278 ft lbs. does anyone happen to know why there is this difference?
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Old 03-01-2014, 09:39 PM   #29
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Two different motors, one has variable valve timing ignition which generates more hp and torque.
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Old 03-01-2014, 09:46 PM   #30
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I agree that the extra weight of the SUV (4Runner) cutting into GCWR would account for some of the rating difference. Rear axle loading (the shorter 4Runner will get more load transferred onto its rear axle from the front) may limit the 4Runner's rating. The point is that even though Toyota is following SAE standard J2807 - which takes performance into account - the rating does not indicate the acceleration or climbing performance.

With different engine output and different weight, I suspect that there will be little difference in acceleration up the grade... despite having different "excess capacity" to their tow ratings.

It is interesting how different the power outputs are, given not just the same size engine but the same engine design (1GR-FE), mounted the same way (longitudinal) likely with similar intake tracts and exhaust systems. The 4Runner gets its additional power from dual VVT-i (valve timing control) rather than single VVT-i, so it will likely have a broader power band and will be able to take good advantage of its higher potential... so I vote for the 4Runner to win by a nose.

Of course, almost no one uses the full power capability of their engine, because they are not willing to operate it at peak power speed for sustained periods - that's 5600 rpm for the 4Runner and 5200 rpm for the Tacoma. In actual use, the 4Runner driver may be more likely to fail to make optimal gear selections for performance and leave more power unused. They are likely using the same transmission (not enough specs online to be able to tell), but have different tire heights (changing effective gearing) and could be geared differently, complicating the situation further.
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