Adjustable lower control arm
3rd Gear Member
Joined: Nov 2005
Posts: 681
From:
RE: Adjustable lower control arm
So, about the LCAs, what is the effect of a changed pinion angle after lowering? In other words, if you lower the car, why doesnt just adding relocation brackets to LCAs do it? When you say pinion angle, does that actually refer to the ring and pinion from the diff? The reason, i dont really want adj LCAs, is the Steeda Billet Trailing arms look soo good.
http://www.steeda.com/images/0506_bi...ntrol_arms.jpg
Thanx much
http://www.steeda.com/images/0506_bi...ntrol_arms.jpg
Thanx much
5th Gear Member
Joined: Mar 2006
Posts: 2,544
From:
RE: Adjustable lower control arm
ORIGINAL: Stang Skeleton
So, about the LCAs, what is the effect of a changed pinion angle after lowering? In other words, if you lower the car, why doesnt just adding relocation brackets to LCAs do it? When you say pinion angle, does that actually refer to the ring and pinion from the diff? The reason, i dont really want adj LCAs, is the Steeda Billet Trailing arms look soo good.
http://www.steeda.com/images/0506_bi...ntrol_arms.jpg
Thanx much
So, about the LCAs, what is the effect of a changed pinion angle after lowering? In other words, if you lower the car, why doesnt just adding relocation brackets to LCAs do it? When you say pinion angle, does that actually refer to the ring and pinion from the diff? The reason, i dont really want adj LCAs, is the Steeda Billet Trailing arms look soo good.
http://www.steeda.com/images/0506_bi...ntrol_arms.jpg
Thanx much
Pinion angle is the angle between the centerline of the driveshaft and the centerline of the pinion gear. You can only adjust it precisely with either adjustable LCAs or UCA.
I don't like those Steeda billet arms:
1) They are very expensive.
2) They are not as strong as the tubular steel control arms available from various other vendors.
3) They are not adjustable.
4) They do look good, but you can't really see them once they're installed on your car anyway.
However, if you decide that you want them, just get an adjustable upper control arm to go with them. You can use the adjustable upper to set your pinion angle--it will just be more of a hassle than adjustable lowers.
3rd Gear Member
Joined: Nov 2005
Posts: 681
From:
RE: Adjustable lower control arm
ORIGINAL: CrazyAl
The LCA relocation brackets have ZERO effect on the pinion angle. The LCAs adjust the leverage between the rear axle and the chassis. This is called "instant center". You can look this up on google for a better understanding if you want. But, basically, the instant center adjustment lets you increase how much weight transfer goes to the rear of the car, so when you slam on the gas you get better traction in the rear.
Pinion angle is the angle between the centerline of the driveshaft and the centerline of the pinion gear. You can only adjust it precisely with either adjustable LCAs or UCA.
I don't like those Steeda billet arms:
1) They are very expensive.
2) They are not as strong as the tubular steel control arms available from various other vendors.
3) They are not adjustable.
4) They do look good, but you can't really see them once they're installed on your car anyway.
However, if you decide that you want them, just get an adjustable upper control arm to go with them. You can use the adjustable upper to set your pinion angle--it will just be more of a hassle than adjustable lowers.
ORIGINAL: Stang Skeleton
So, about the LCAs, what is the effect of a changed pinion angle after lowering? In other words, if you lower the car, why doesnt just adding relocation brackets to LCAs do it? When you say pinion angle, does that actually refer to the ring and pinion from the diff? The reason, i dont really want adj LCAs, is the Steeda Billet Trailing arms look soo good.
http://www.steeda.com/images/0506_bi...ntrol_arms.jpg
Thanx much
So, about the LCAs, what is the effect of a changed pinion angle after lowering? In other words, if you lower the car, why doesnt just adding relocation brackets to LCAs do it? When you say pinion angle, does that actually refer to the ring and pinion from the diff? The reason, i dont really want adj LCAs, is the Steeda Billet Trailing arms look soo good.
http://www.steeda.com/images/0506_bi...ntrol_arms.jpg
Thanx much
Pinion angle is the angle between the centerline of the driveshaft and the centerline of the pinion gear. You can only adjust it precisely with either adjustable LCAs or UCA.
I don't like those Steeda billet arms:
1) They are very expensive.
2) They are not as strong as the tubular steel control arms available from various other vendors.
3) They are not adjustable.
4) They do look good, but you can't really see them once they're installed on your car anyway.
However, if you decide that you want them, just get an adjustable upper control arm to go with them. You can use the adjustable upper to set your pinion angle--it will just be more of a hassle than adjustable lowers.
3rd Gear Member
Joined: Jul 2005
Posts: 718
From:
RE: Adjustable lower control arm
I agree with Al but I feel he didn't explain what the pinion angle should be at (or I simply overlooked it) for our cars the pinion angle should be EXACTLY the same as the tranny angle. The Universals should be parallel to each other in order to cancel each others harmonic vibrations. In a double cardigan set up (also known as CV) the pinion should be set up to point at the tranny output. The double universals in the CV cancel each other and the pinion universal should be run so that is is perfectly straight.
3rd Gear Member
Joined: May 2006
Posts: 692
From: New Hampshire
RE: Adjustable lower control arm
Stang Skeleton, If you like the Steeda product, check these out. I think they're lighter and look better. http://www.blowbyracing.com/bbr-0506-001.html
This product is supposed to be one of the strongest out there but is up there in price also.
http://www.blowbyracing.com/mca-2005.html
This product is supposed to be one of the strongest out there but is up there in price also.
http://www.blowbyracing.com/mca-2005.html
3rd Gear Member
Joined: Nov 2005
Posts: 681
From:
RE: Adjustable lower control arm
ORIGINAL: BoidMorphs
Stang Skeleton, If you like the Steeda product, check these out. I think they're lighter and look better. http://www.blowbyracing.com/bbr-0506-001.html
This product is supposed to be one of the strongest out there but is up there in price also.
http://www.blowbyracing.com/mca-2005.html
Stang Skeleton, If you like the Steeda product, check these out. I think they're lighter and look better. http://www.blowbyracing.com/bbr-0506-001.html
This product is supposed to be one of the strongest out there but is up there in price also.
http://www.blowbyracing.com/mca-2005.html
5th Gear Member
Joined: Jan 2006
Posts: 2,398
From: Florida
RE: Adjustable lower control arm
ORIGINAL: CrazyAl
There are certain other mods that make the adjustable LCAs (and LCA relocating brackets) useful.
For example, if you change your rear tire outer diameter or if you switch to straight (1 piece) driveshaft. However, the most common reason is if you lower the car.
There are certain other mods that make the adjustable LCAs (and LCA relocating brackets) useful.
For example, if you change your rear tire outer diameter or if you switch to straight (1 piece) driveshaft. However, the most common reason is if you lower the car.
5th Gear Member
Joined: Mar 2006
Posts: 2,544
From:
RE: Adjustable lower control arm
ORIGINAL: Menace
What exactly do you mean by changing the rear tire outer diameter?
What exactly do you mean by changing the rear tire outer diameter?
The stock tires measure about 27" tall. If you change your tire size to something different, then the chassis will sit lower or higher in the rear, depending on wether your tire is larger or smaller than stock. If you install a larger rear tire, then the rear end sits higher, and the LCA angle makes the instant center adjustment "off". This only applies if you are running different size tires front and rear.
For example, I am running Goodyear Eagle F1 in the rear, the size is 295 45 R18. They measure 28.4" in diameter (This is the OEM tire on the Lightning truck). My fronts are also Eagle F1, but they are "stock" diameter. This makes the rear end of my car sit about 3/4" higher than stock--consequently the LCA angle would be thrown off a bit. I also installed the Roush springs (rear only). Consequently, my instant center would have been off bigtime (from both the springs and the larger tires). therefore, I am using the LCA relocation brackets and adjustable LCAs to keep everything properly aligned afterwards.
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