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  #191  
Old 16th May 2018, 05:57 PM
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Have you corner weighted a lifter car against a non lifted car?
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  #192  
Old 16th May 2018, 06:39 PM
MiddleAgeSubie MiddleAgeSubie is offline
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Quote:
Originally Posted by jf1sf5 View Post
Center of gravity is very important !

Lets take two identical Toyota Prado's except that one has a 3" lift...the lifted one will be less capable on and off road because the weight in hight will always give more movements/instability, more weight transfer thus less grip.

For example, up a steep climb, the lifted Prado will have more weight on the rear wheels and less on the front wheels than the standard height Prado.

Then, everything is about compromise, because the lifted Prado will have better angles.
This must be part of the story. Weight transfer increases while wheelbase decreases. This would explain why hugely built 2dr old Wranglers without lockers or offroad traction control can make things look difficult (2007+ have offroad traction control and the Rubicons have front and rear lockers standard).

Btw, I am keeping my Prado-based 4Runner stock except for AT tires, stock sized, and 3/16 steel plates under engine, transmission, transfer case, and gas tank plus on the mounts of the rear LCAs. If I ever go up, it will be 1.75/1.5, not 3 and not even 2".

I suppose the physics of moving rigs over undulating terrain are pretty complicated.
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  #193  
Old 17th May 2018, 03:47 AM
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Quote:
Originally Posted by Rally View Post
Have you corner weighted a lifter car against a non lifted car?
Yes, a lifted car (lets say the Prado) is probably 8kg heavier ! 2kg per corner on a flat surface but probably 100+kg heavier on the rear axle on a 30 incline

A car is meant to move and thus dynamic is more important than static
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  #194  
Old 17th May 2018, 05:33 AM
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So what were the before and after corner weights?
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  #195  
Old 17th May 2018, 06:20 AM
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I think what people are talking about only applies when the car is on a hill. As the centre of gravity increases, the weight shifts towards the rear wheels while on a hill. Uneven weight distribution is bad for traction assuming all 4 wheels are on ground. Another advantage that adds to the low centre of gravity is that subarus tend to have the centre of gravity quite far forwards compared to other 4wds. (This does depend on model) So the result the weight will be closer to even on steep hills.

The amount a lift causes the weight to shift is

Lift height multiplied by tan(angle of slope)


If you are lifting wheels, you don't actually want the weight to be in the centre of the wheels, as that causes the car to rock about more o nthe balancing point and get diagonal wheelspin. Subarus front heaviness helps on level ground. But there's always this awkward slope angle where it rocks on the balancing point. And that slope varies between cars.
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  #196  
Old 17th May 2018, 06:32 AM
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On another topic, there's lots of videos of the front and rear independent suspensioned Y62 Patrols absolutely destroying solid axled 4wd's such as Landcruisers offroad, despite being so heavy. Independent suspension is beast offroad.


Y62 tows 70 series up hill.
https://www.youtube.com/watch?v=jc3Jcuj8C-I


Goes good in Subaru territory (sand) too. (Bit of language in this video)
https://www.youtube.com/watch?v=8TiazNPartY
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  #197  
Old 17th May 2018, 11:24 AM
scalman scalman is online now
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ir depends could be same car one with full trunk furniture fridges and stuff and other with nothing and they would perform like different cars. we dont see that in videos how much they have stuff in trunk. at least front isf land cruisers likes to snap front axles very fast.
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