Which hole?

[pajeff02]

I am replacing the stock rear suspension pieces on our car with UMI tubular LCA's, relocation brackets and panhard bar. The car is NOT lowered thanks to our crappy northern Pennsylvania roads.

There are two (2) holes to choose from on the relocation brackets. I believe they are referred to as 2" (top hole) and 3" (bottom hole) in the instructions. However, the instructions do not give any recommendation on what hole to install the rear LCA bolt in.

Which one should I use for our setup?

[vetteemt]

The top hole should make the lca angle slightly negative or parallel, which well help create some anti-squat. The bottom hole well set the angle to a more extreme negative angle and create lots of anti-squat. Creating max anti-squat well increase your straight line traction greatly, but well adjust the roll center of the rearend making the car looser. I personally have mine on the bottom setting and have found that tho I lost a little cornering ability, the gains in traction well make up the difference plus some.

[pajeff02]

Thank you! I just wasn't sure and the instructions are devoid of any recommendations. I am not much over stock HP right now, so I may use the top hole as a compromise. Good to know though.

[Hi-Po]

Depends. At the very least put it in the center hole. Is the car lowered at all? I have mine in the bottom hole and it helped a good amount at the track.

[Mr. Luos]

Even lowered I have found traction best in the middle hole.

[Hi-Po]

Even lowered I have found traction best in the middle hole.

What is the angle on the LCA on your car? Straight, angled down TOWARDS the rear end, or angled down TOWARDS the engine?

[Mr. Luos]

-2.25 pinion angle.

I would have to go out and look to see what the LCA's are doing.

[Hi-Po]

-2.25 pinion angle.

I would have to go out and look to see what the LCA's are doing.

lol, gotcha. I think mine angle was closer to 3. It seemed to work out alot better then what I orginally had in it!

[Mr. Luos]

While resting, you want the angle to be minus. More so for M6's.
While under load you want the angle at zero, which is why it takes a few times to get it just right. It will vary from car to car.

[Hi-Po]

lol, gotcha. I think mine angle was closer to 3. It seemed to work out alot better then what I orginally had in it!

While resting, you want the angle to be minus. More so for M6's.
While under load you want the angle at zero, which is why it takes a few times to get it just right. It will vary from car to car.

Yea, that "3" wasnt a positive number

So far its been good for a 1.69 60', so its gotta be really close.

[c5z28]

Good to know on my 18" the bottom hole works nicely on the 16" I was getting some wheel hop off the line. Cut 1.94 but i'll give the middle one a try.

[Hi-Po]

Good to know on my 18" the bottom hole works nicely on the 16" I was getting some wheel hop off the line. Cut 1.94 but i'll give the middle one a try.

TQ Arm angle setting?

[c5z28]

TQ Arm angle setting?

Stock torque arm. Haven't dicked with it yet

[Hi-Po]

Stock torque arm. Haven't dicked with it yet

Thats always easier! Stock sometimes sounds better.