Help with 4 link calc

GearHead11

Well-Known Member
Joined
Jul 10, 2013
Location
Winston Salem
Just picked up a samurai with a 4 linked rear. He didn't build it with a calc so I pulled all the measurements and was going to run the numbers but I don't have excel on my laptop. Can someone run these numbers and screenshot the results and post up? I'd really appreciate it.

full
 
Just realized I forgot to measure vertical separation. I will get those tomorrow
 
Are you link length #s the distance from bolt center to bolt center?

It would be better to measure the distance from axle centerline to each mount, as viewed horizontally from the side.

And a height measurement to the upper bellhousing bolt
 
Also need these numbers:
Wheelbase
Tire Diameter
Tire Rolling Radius
CG (the upper bell housing bolt height that @Mac5005 referred too)
Rig Weight
 
Just guessing on some of the numbers but this is what I have so far.
 

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Mac5005 said:
Are you link length #s the distance from bolt center to bolt center?

It would be better to measure the distance from axle centerline to each mount, as viewed horizontally from the side.

And a height measurement to the upper bellhousing bolt
Click to expand...

Yes bolt center to bolt center. I'll pull a bell housing measurement this Evening if I can get in there.

Chris_Keziah said:
Also need these numbers:
Wheelbase
Tire Diameter
Tire Rolling Radius
CG (the upper bell housing bolt height that @Mac5005 referred too)
Rig Weight
Click to expand...

Wheelbase is 100"
Tire diameter is 37"
Not sure on the rolling radius
 
Chris_Keziah said:
Just guessing on some of the numbers but this is what I have so far.
Click to expand...

Most of those look pretty close. I was thinking the uppers need to be longer and come down some on the frame side. 9% anti squat seems very low. Isn't the goal for most applications 60-80%? I haven't driven it other than around my neighborhood but the rear seems to stay level under acceleration but then again it's a 1.3L so it has no power
 
GearHead11 said:
Yes bolt center to bolt center. I'll pull a bell housing measurement this Evening if I can get in there.



Wheelbase is 100"
Tire diameter is 37"
Not sure on the rolling radius
Click to expand...


It's much easier to input data if you measure from axle center line forward to bolts, measuring link lengths is across 2 angles, and doesn't define location.

Measure distances as if view horizontally from side view.
 
GearHead11 said:
Most of those look pretty close. I was thinking the uppers need to be longer and come down some on the frame side. 9% anti squat seems very low. Isn't the goal for most applications 60-80%? I haven't driven it other than around my neighborhood but the rear seems to stay level under acceleration but then again it's a 1.3L so it has no power
Click to expand...

Get some more accurate mount measurements from the center line like Mac said. It's very easy to change A/s without much link mount location movement.
 
Will do thanks fellas.
 
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