LCA&UCA question..

mity2

I like Pro3 and all I got was this crappy CT.

Jul 24, 2003

2,872

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48

StateCollege PA

Feb 12, 2006

#1

• Feb 12, 2006

• #1

what is the benefit of having adjustable UCA and LCA instead of non-adjustable unit?
I know that if your LCA have adjustable spreing seat, then you can adjust hightof rear end, but h=one that have adjustable sphirical beraing i don't know the benefit of it...

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Feb 12, 2006

#2

• Feb 12, 2006

• #2

I do not think there are adjustable UCAs. I believe that what Maximum Motorsports recommends is just the stock Ford UCA. There is not a lot of aftermarket on the UCAs. You can change UCA bearings though but they press out and it is difficult. MM sells a special tool for UCA bearing removal.

 

T

thump_rrr

New Member

Nov 25, 2004

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Montreal, Canada

Feb 12, 2006

#3

• Feb 12, 2006

• #3

mity2 said:

what is the benefit of having adjustable UCA and LCA instead of non-adjustable unit?
I know that if your LCA have adjustable spreing seat, then you can adjust hightof rear end, but h=one that have adjustable sphirical beraing i don't know the benefit of it...

Click to expand...

The reason for adjustable uca's is to permit adjustment of the pinion angle. By lowering the car the relationship between the driveshaft and the rear axle changes. By adjusting the uca's you are "rotating" the rear axle which changes the pinion angle.

 

mity2

I like Pro3 and all I got was this crappy CT.

Jul 24, 2003

2,872

3

48

StateCollege PA

Feb 12, 2006

#4

• Feb 12, 2006

• #4

Kilgore Trout said:

I do not think there are adjustable UCAs. I believe that what Maximum Motorsports recommends is just the stock Ford UCA. There is not a lot of aftermarket on the UCAs. You can change UCA bearings though but they press out and it is difficult. MM sells a special tool for UCA bearing removal.

Click to expand...

Ya I notice that the there aren't many Udjustable UCA.
There is this place called UMI performance near my house. They do mostly GM cars(i uses their stuff on my old Camaro, and using one in my T/A),They sell them(link)
I don't think I'm going to go with adjustable one. But i'm just wondering whats their benefit is...

 

mity2

I like Pro3 and all I got was this crappy CT.

Jul 24, 2003

2,872

3

48

StateCollege PA

Feb 12, 2006

#5

• Feb 12, 2006

• #5

thump_rrr said:

The reason for adjustable uca's is to permit adjustment of the pinion angle. By lowering the car the relationship between the driveshaft and the rear axle changes. By adjusting the uca's you are "rotating" the rear axle which changes the pinion angle.

Click to expand...

Is this cretical? Because I've never even thought of that. My car is lowered with Sportline and will pinion angle be off alot??

 

K

Kilgore Trout

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Mar 30, 2005

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Feb 12, 2006

#6

• Feb 12, 2006

• #6

thump_rrr said:

The reason for adjustable uca's is to permit adjustment of the pinion angle. By lowering the car the relationship between the driveshaft and the rear axle changes. By adjusting the uca's you are "rotating" the rear axle which changes the pinion angle.

Click to expand...

Cool! Did not know that

 

HoustonGT

Gilded Gelding

Apr 6, 2003

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Houston

Feb 12, 2006

#7

• Feb 12, 2006

• #7

Do UCA's basically do the same thing as LCA's just not too such a great extent? I know LCA's are supposed to help you hook up better, how bout UCA's?

 

K

Kilgore Trout

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Feb 12, 2006

#8

• Feb 12, 2006

• #8

Stock UCA part# M-5500-A



MM Adjustable LCA

 

Attachments

• M5500A.webp

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blackfang

Founding Member

Dec 17, 2001

1,290

1

39

Richmond, Va

Feb 12, 2006

#9

• Feb 12, 2006

• #9

Many sersious drag racers adjust pinion angle with adjustable UCA's for maximum traction under hard launches.

How to measure pinion angle right here
http://www.steeda.com/-techtips/pinionangle.htm

I just got some MM non adjustable LCA's from a GP so they should work being they have spherical bushings on the axle side and poly on the other.

 

propellerhead

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Apr 13, 2004

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"but what's with the but shots?"

Feb 12, 2006

#10

• Feb 12, 2006

• #10

UPR has adjustable upper control arms.

 

hotrodnut

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Jul 12, 2004

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North Florida

Feb 14, 2006

#11

• Feb 14, 2006

• #11

Having adjustable sperical bearings on the lower control arms provide an adjustment to assure the rear axle is perpendicular to the theoretical center line of the chassis. Engineering tolerence stack-ups can build up to a number that will actually make the car track slightly angled when driving and the adjustable ends allow one to correct this.