4 link critique

[socsmm6]

FRONT 4 LINK

Vehicle Specifications: Suspension Geometry: Geometry Summary:
Wheelbase 108.0in Upper Links x y z Static Anti-Squat 28%
Tire Diameter 36.00in Frame End 32.00 19.00 25.00in Roll Center Height 25in
Tire Rolling Radius 17.00 in Axle End 0.00 8.00 25.00in Roll Axis Angle(1)
Vehicle CG Height 36.00 in Lower Links x y z Instant Center X-Axis 249
Vehicle Mass 4,000 lb Frame End 44.00 11.00 20.00in Instant Center Z-Axis 25in
Front Unsprung Mass 550 lb Axle End 3.00 16.00 19.00in

REAR 4 LINK

Wheelbase 108.0in Upper Links x y z Static Anti-Squat 45%
Tire Diameter 36.00in Frame End 32.00 19.00 27.00 in Roll Center Height 27in
Tire Rolling Radius 17.00in Axle End 0.00 5.00 27.00 in Roll Axis Angle (1)
Vehicle CG Height 35.00in Lower Links x y z Instant Center X-Axis 331in
Vehicle Mass 4,000lb Frame End 44.00 15.00 20.00 in Instant Center Z-Axis 27in
Front Unsprung Mass 500lb Axle End 3.00 19.00 19.00 in

 

[twiztedzuki]

sounds good

 

[85buggy]

what the hell :****:

 

[Elliott]

Take that **** back over to pirate

 

[halcat]

All that **** just tied my rig in a knot!

 

[jccarter1]

Bring that **** to my shop and do my 4-link bc I think you have a lot better understanding than I ever will

PS are you the guy that I cheated off of in Dr. Bracken class?

 

[TacomaJD]

FRONT 4 LINK

Vehicle Specifications: Suspension Geometry: Geometry Summary:
Wheelbase 108.0 in Upper Links x y z Static Anti-Squat 28 % Travel Anti-Squat: 28%
Tire Diameter 36.00 in Frame End 32.00 19.00 25.00 in Roll Center Height 25 in Travel Roll Center: 24.59
Tire Rolling Radius 17.00 in Axle End 0.00 8.00 25.00 in Roll Axis Angle (1) degrees (Roll Understeer) Travel Roll Axis: -1.02
Vehicle CG Height 36.00 in Lower Links x y z Instant Center X-Axis 249 in Pinion Change: 0.00
Vehicle Mass 4,000 lb Frame End 44.00 11.00 20.00 in Instant Center Z-Axis 25 in Travel Amount: 0.00
Front Unsprung Mass 550 lb Axle End 3.00 16.00 19.00 in Travel Increment: 1.00

REAR 4 LINK

Wheelbase 108.0 in Upper Links x y z Static Anti-Squat 45 % Travel Anti-Squat: 45%
Tire Diameter 36.00 in Frame End 32.00 19.00 27.00 in Roll Center Height 27 in Travel Roll Center: 27.16
Tire Rolling Radius 17.00 in Axle End 0.00 5.00 27.00 in Roll Axis Angle (1) degrees (Roll Understeer) Travel Roll Axis: -0.99
Vehicle CG Height 35.00 in Lower Links x y z Instant Center X-Axis 331 in Pinion Change: 0.00
Vehicle Mass 4,000 lb Frame End 44.00 15.00 20.00 in Instant Center Z-Axis 27 in Travel Amount: 0.00
Front Unsprung Mass 500 lb Axle End 3.00 19.00 19.00 in Travel Increment: 1.00

 

[Bronco Buster]

whatd he say

 

[honky kong]

I glad someone else said it first, I looked at this ****, got so damn confused I couldn't find my way home.

 

[June dog]

Looks like a lot of **** just to run 36's.

 

[w]

What Guys,That is exactly how i done mine. Works great

 

[socsmm6]

that did not copy like it showed on preview. Hope I figure 4 link better than I do computers.

 

[Nuts]

How does that tell you where to mount anything, and what happens when something else is already occupying the space that tells you to put a link in?

 

[socsmm6]

alread been under the 4 runner measuring. I will have to change up the frame rails and move the axle foward but it looks like it will fit without hiting anything.

this look any better?

front axle
Wheelbase 108
Tire diameter 36
Tire rolling radius 17
Cog 36

Upper links x y z static anti-squat 28%
Frame end 32 19 25 roll center 25
Axle 0 8 25 roll axis -1
Instant center x axis 249
Lower links x y z instant center z axis 25
Frame end 44 11 20
Axle 3 16 19

 

[TacomaJD]

I don't even know what this means, is this the same ancient alien arithmetic that the Mayans received when they were making their calendar?

 

[5BrothersFabrication]

Take that **** back over to pirate

I usually try and help anybody I can, but my first thought was what Elliot said, so I just avoided the question.

 

[J.P.]

On my rear 4 link I used calculator stayed confused most of the time trying to figure it out. But with some help from an engineer I finally got it figured out. On the front I took a much simpler approach. Make sure that the lowers are longer than the uppers (30% difference I think Is the Best number)get them as far apart on the frame as possible, top should have around 22 Degrees of triangulation and the lowers at least 10 degrees, make them as long as you are able too and buy the best link material you can afford. Use cheap tube or plastic pipe to make up mock links and make sure nothing binds before cutting up the high dollar stuff. I say this because what is on paper does not always work in real life because there will be something in the way or lack of room.

 

[Fire Freak]

Peterson's 4wheel& offroad june and july 2003 has an article on how to set up a four link. I followed they're setup and mine works good atleast it seems to

 

[socsmm6]

uppers are right at 30% shorter than the lowers, the uppers are as far out on the frame as possible (had to make frame wider at front) and are close to 21-22 degrees from center, the lowers should be 10 to 15 degrees from center. I have been running 2 x .250 square tubing for links on the rear axle for well over a year with no problem.
using plastic pipe for mock up links is a good idea. I started to use some old 3/4 metal pipe for mock up but plastic pipe would get closer to actual size of what I am using without the weight.

 

[socsmm6]

I read the petersons article. I have always heard make links as long as possible but not sure how long is "as long as possible". are they talking 3, 4, 5, 6 feet in lenght. the longer they are the easier they will bend.