4-Link: Bar locations?

[pinebox]

I'm ever so slowly working on the parallel 4-link for the rear of my '65 Mustang.
I've pretty much got the layout I'm after for everything to fit. But, in looking into other 4-link kits, I noticed a big difference in where the bar locations mount at the axle.

Check the attachment for a few of the kits out there.
Red- Both upper and lower bars are in front of the axle and the point are aligned vertically.
Green- Lower bar is aligned vertically with the axle, but the upper is above and behind the axle centerline.
Blue- Both upper and lower bars are aligned vertically with the axle.



Opinions on which would be a more optimal layout for a street car? Not so much a track/drag car.

[dontlifttoshift]

If we are only talking about the side view geometry and I have to pick from those I would want the green.

[killer69]

i vote blue but there is LOT more involved that what is shown here

[RobNoLimit]

I would pick the Green for a driver.

The top bar 'Pulls', and plants the tire, using the leverage from the axle CL UP to the pivot. (so with the red, no leverage, no loading the tire. Toss that example)
The lower bar 'Pushes', to make the car go forward. Again, using the leverage from the axle CL DOWN to the pivot.

Green and Blue are very close. Green design is trying to maximize bar length, and the Blue is trying to gain some forward push. (both will probably suffer from not enough tire loading) - but, unless you want to raise up the floor you can't raise the bar for more tire loading. The problem with these cars is packaging room.

Best choice to me is Green top bar and Blue lower bar. ** OR ** put a torque arm in the car and be happy.

[rickpaw]

Just curious,

What if someone screws up and needs to adjust the pinion angle, and the top link ends up in "red" (forward), and the bottom link ends up being behind the axle center line?

[CSG]

Just curious,

What if someone screws up and needs to adjust the pinion angle, and the top link ends up in "red" (forward), and the bottom link ends up being behind the axle center line?

I would be more worried about the angle they end up at then the actual location on the axle.