Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 03-07-2012, 05:16 AM   #3
Registered User
 
Join Date: Nov 2006
Location: In the garage...
Posts: 1,736
Just to help educate you as there is plenty of misunderstanding out there w/ regards to towing and capacity...

4000# gross towing capacity is the old * as in *properly equipped blah blah blah. The blah blah blah is important and means... Total weight of cargo + passengers + accessories + actual item being towed must not exceed 4000#... all while assuming tow vehicle has proper running gear: correct weight class hitch, trans cooler (if needed, etc.).

So, lets assume you have proper class III hitch for towing. You also have:

450# - 3 total occupants (driver + 2 pass) and on average each is 150#
500# - 'Accessories' (3rd row seats, sunroof, Nav, 2nd row A/C, DVD players, etc.)
150# - luggage/bags/stuff for occupants in the vehicle.
1100# - total cargo

Total above, 1100#, gets deducted from total gross towing capacity to find out MAX trailer weight left available. In this case it would be 2900# (4000#-1100#). With an aerodynamic load, a boat for instance, you can "cheat" a little more...

That said, the bigger issue usually isn't get up and go but rather stopping. Brakes/rotors/pads on many domestic vehicles, sans those designed for towing like F250/350s, are undersized and pretty well maxed out w/ just occupants, accessories, and interior cargo. Add in a trailer getting close to total max will overheat your brakes the first time you tow and rotors will glaze and/or warp quickly.

Also, FWIW, recommended tongue weight is usually just 10% of trailer weight for proper load distribution b/w tow vehicle and trailer... so 290# in this case (but could go up to 400# 'properly equipped'.

To play it safe, assume towing is like electrical circuits in a home... aim to not exceed 75% max capacity of weakest component (which should be the breaker not wiring).

Good luck

Last edited by Burg Boxster; 03-07-2012 at 05:19 AM.
Burg Boxster is offline   Reply With Quote
 



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 02:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page