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Old 09-17-2018, 06:48 PM   #1
Trigger Tough
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Member#: 491335
Join Date: Sep 2018
Default Alignment Specs for an STi RA

I picked up a 2018 STi RA on September 1st. It was one of the STi with bad tires and a bad alignment. After 12 days of sitting in the shop at Subaru waiting for tires I finally picked it up today

My question is do these alignment measurements sound right:

Left Front
Camber -0.4
Caster 6.4
Toe 0.14

Right Front
Camber -0.8
Caster 6.1
Toe 0.14

Left Rear
Camber -2.0
Toe 0.00

Right Rear
Camber -2.0
Toe 0.00

Steer Ahead and Thrust Angle are both at 0.00. Total Toe up front is at 0.28

Thanks!
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Old 09-17-2018, 08:45 PM   #2
CaptainSlowbaru
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Join Date: Apr 2016
Chapter/Region: Tri-State
Location: Roberts Subaru-Downingtown, PA
Vehicle:
2002 Outback Sport
Green

Default

The L/F camber should be adjusted to match the R/F. That difference in camber will result in a drift to the left.

Tech's these days... just because it's green, doesn't mean it's in proper alignment.

Also, the rear could stand to be toed-in a bit.

I'd take it back and have it redone. Properly.
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Old 09-17-2018, 11:20 PM   #3
n2oiroc
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is that toe in degrees or inches? i also agree with a little toe in on the rear (.125" total or so) and id have the front set to max equal negative camber and zero toe in the front. they arent obligated to do it for free since it is "in spec" so dont be shocked if they want to charge you.
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Old 09-18-2018, 12:11 AM   #4
Trigger Tough
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Default

It’s all in degrees

I thought the front camber should be more. I’ve seen -1.5 on a lot of sheets, with the rears being at .7 or so

Do you think that amount of toe in on the front will cause excessive tire wear?
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Old 09-18-2018, 03:03 PM   #5
n2oiroc
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Quote:
Originally Posted by Trigger Tough View Post
It’s all in degrees

I thought the front camber should be more. I’ve seen -1.5 on a lot of sheets, with the rears being at .7 or so

Do you think that amount of toe in on the front will cause excessive tire wear?
thats almost 1/4" toe in, so yeah thats a ton and it will eat tires. you can easily get more negative camber in front, they just didnt try for it. id have them set the front toe to 0 or maybe a touch in (.100" total). generally toe in adds stability at high speed and toe out makes the steering more responsive. it really depends what you are after. for autocross you want toe out on both ends. for street and highway driving i like a little toe in so im not sawing at the wheel over every little imperfection in the road.
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Old 09-18-2018, 04:09 PM   #6
Canez17
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Chapter/Region: SWIC
Location: Tucson
Vehicle:
2016 WRX
WR Blue

Default 2016 WRX alignment

What are the specs for 2016 WRX alignment w/ stock suspension,rims,and tires?
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Old 09-18-2018, 05:05 PM   #7
n2oiroc
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Quote:
Originally Posted by Canez17 View Post
What are the specs for 2016 WRX alignment w/ stock suspension,rims,and tires?
factory spec is a very wide range of #'s that can either drive great or miserable depending on the combination. if you are looking for good specs, its the same as posted above. the suspension geometry is the exact same on all 2015+ wrx/sti/ra, etc.
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Old 09-19-2018, 07:19 AM   #8
Trigger Tough
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Default

Quote:
Originally Posted by n2oiroc View Post
thats almost 1/4" toe in, so yeah thats a ton and it will eat tires. you can easily get more negative camber in front, they just didnt try for it. id have them set the front toe to 0 or maybe a touch in (.100" total). generally toe in adds stability at high speed and toe out makes the steering more responsive. it really depends what you are after. for autocross you want toe out on both ends. for street and highway driving i like a little toe in so im not sawing at the wheel over every little imperfection in the road.
After going to an alignment shop to check the numbers they said itís just fine where itís at. They said thereís not that much tow in it and if they took the tow out it wouldnít stick to the road as well. Iím going to keep it where itís at since the car is driving straight with no understeer whatsoever
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Old 09-20-2018, 05:09 PM   #9
MedicDG
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2016 STi
WRB

Default

Quote:
Originally Posted by Trigger Tough View Post
I picked up a 2018 STi RA on September 1st. It was one of the STi with bad tires and a bad alignment. After 12 days of sitting in the shop at Subaru waiting for tires I finally picked it up today



My question is do these alignment measurements sound right:



Left Front

Camber -0.4

Caster 6.4

Toe 0.14



Right Front

Camber -0.8

Caster 6.1

Toe 0.14



Left Rear

Camber -2.0

Toe 0.00



Right Rear

Camber -2.0

Toe 0.00



Steer Ahead and Thrust Angle are both at 0.00. Total Toe up front is at 0.28



Thanks!


Right and left camber should be the same! If those numbers are not the same will have a pull. Iím going to say if you fix those numbers that MAY solve your problem.

I find if the toe outside 0.00 will cause your steering wheel not to be centered and camber not the same numbers right and left will cause your vehicle to pull left or right.
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Old 09-22-2018, 12:45 PM   #10
Trigger Tough
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Default

Itís not pulling anymore which is good, but Iím sure Subaru did cross camber because of road crown maybe?
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