88fastgta

iTrader: (9)

hey everyone i just lowered my car with the help of camaronewbie.... i had a few questions


do i need to get my car aligned after its been lowered with the pro kit

where should my tire pressure be at.. i drive kinda aggresive and i have 245/50/16 kumo ast tires....


since i lowered my car i do i need lcarbs with the pro kit....

here are my mods now

Spohn Front end rebuild kit with poly tie rods
UMI Adjustable Strut mounts
KYB GR-2 Front struts
KYB Gas-a-just rear shocks
Eibach Pro-kit lowering springs
36mm front sway bar with poly bushings
24mm rear sway bar with poly bushings
Stock painted A arms poly bushings and poly ball joints
new poly front and rear sway bar endlinks
Front K-member Braces
UMI Steering Brace
BMR Strut Tower brace
BMR weld in outer subframe connectors
Alstons weld in Inner subframe connectors
BMR non adjust Torque arm with poly bushing
Spohn On car Adjustable panhard bar poly bushings
J & M Street non adjust Lower Control Arms

theNMBR27

yes you do, I used the same Eibach Pro kit so let me find my alignment specs and I'll post them. When you lower the car it tends to shift everything and I had an extremely hard time getting a shop to actually do the alignment and keep the car driving straight.

Mitch91Z28

Your alignment will change drastically when ride height is changed. Alignment highly recommended.

I ran 30 psi in the kumho AST 245 50 16 tires. I hated those tires. No traction for my driving style. Now I run Firestone Firehawk Wideovals in the same size.

You Should get the Lower control arm Reloc. Brackets to restore your control arm angle.

As for the alignment angles the factory specs are listed all over this site. I personally align my own car at my shop to these specs with great results and minimal tire wear.

Camber 0* Caster +4* right side +3.5* left side (Lots of road crown here in utah) Toe +.15* I also load the car with sand bags to emulate my weight in the car to ensure that the alignment is set when i am actually in the car

88fastgta

iTrader: (9)

Well I'm happy with the tires actually..... Do I really need a adjustable torque arm.....

theNMBR27

You don't need an adjustable torque arm, I'm using the factory one without issue. Here's the printout for my alignment after a 2 inch drop. Hope it helps.

Mitch91Z28

The adjustable torque arm is to return the pinion angle to stock... thats not an alignment angle just the angle of the pinion shaft in relation to the ground. Funny stuff goes on when pinion angle gets screwed up

white gold 88

I have the torque arm relocating crossmember. It has adjustable torque arm mounting points. Wouldn't that work the same as adjustable torque arm? Probably not enough to restore pinion angle. Trying to find 65 mph slight vibration. Car has old saggy V6 springs with V8 and 8 point bars. Does sit a little lower than original.

mblackey

We road race an 89 GTA. After moderately lowering the car, we found we needed the adjustable torque arm to restore the correct pinion angle (just as stated in the previous post) AND we needed an adjustable panhard rod to re-center the rear axle. Lowering the rear may cause the rearend to shift laterally. You can get a rough idea of how much by standing a straight edge against each rear tire and measuring the wheelwell clearance.

For street, having the rearend shifted laterally a small amount may not be critical, but it will make the car "dog trot" going down the street.

mblackey

If you're lucky, one of the positions might be close, but I suspect the adjustable mounting points won't effect the pinion angle enough to restore the correct angle.

white gold 88

So what are the LCA relocation brackets for? Cars lowered 2 inches or more? Just wondering because I know mine is lower than factory height. Other than 65 to 70 mph vibration all else seems fine. Thinking back I believe vibration was worse before changing x-member. Changed engine and tranny at same time so it's hard to tell what helped. Checking pinion angle will be next step. Any suggestions?

mblackey

The LCA brackets return the LCAs to their original orientation to the axle to prevent the axle from rotating under acceleration, preventing wheel hop, primarily. The torque arm controls pinion angle. If you don't have enough pinion angle, it can cause driveshaft vibration.

white gold 88

Thanks all. This entire thread has been very informative, to me anyway. Don't have wheel hop problem, yet. I'll be checking pinion angle asap. Thanks again.