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Alignment Settings


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#1 johnc

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Posted 19 October 2007 - 03:12 PM

I get this quesiton daily. Assuming you've spent money and time building adjustability into your suspension AND are willing actually adjust then these recommendations make sense. Otherwise, take the car to Pep Boys, tell the tech to "Make it all green", and hope your tires last a long time.

Track/Autocross

For 225 to 245 width radial DOT tires try these alignment settings:
Front

Camber: 3 to 3.25 neg
Caster: 6 to 7 positive (even on both sides)
Toe: 1/8" to 3/16" out
Ride height: 5 1/2" to 6" measured at the front of the rocker outboard of the pinch weld seam.

Rear

Camber: 2.5 to 3 neg
Toe: 1/16" to 1/8" in
Ride height: 5 3/4" to 6 1/4" measured at the front of the rocker outboard of the pinch weld seam.

For tire widths over 245 try these alignment settings:

Front

Camber: 2.75 to 3 neg
Caster: 6 to 7 positive (even on both sides)
Toe: 1/16" to 1/8"" out
Ride height: 6" to 6 1/2" measured at the front of the rocker outboard of the pinch weld seam.

Rear

Camber: 2.25 to 2.5 neg
Toe: 1/16" to 1/8" in
Ride height: 6 1/4" to 6 3/4" measured at the front of the rocker outboard of the pinch weld seam.

Street

For 225 to 245 width radial DOT tires try these alignment settings:

Front

Camber: 1.25 to 1.5 neg
Caster: 4 to 5 positive (even on both sides)
Toe: 1/16" out or 0
Ride height: 6" to 6 1/2" measured at the front of the rocker outboard of the pinch weld seam.

Rear

Camber: 1.25 to 1.5 neg
Toe: 1/16" to 1/8" in
Ride height: 6 1/2" to 7" measured at the front of the rocker outboard of the pinch weld seam.

For tire widths over 245 try these alignment settings:

Front

Camber: 1.25 to 1.5 neg
Caster: 4 to 5 positive (even on both sides)
Toe: 1/16" out or 0
Ride height: 6 1/2" to 7" measured at the front of the rocker outboard of the pinch weld seam.

Rear

Camber: 1.25 to 1.5 neg
Toe: 1/16" to 1/8" in
Ride height: 7" to 7 1/2" measured at the front of the rocker outboard of the pinch weld seam.

Caveat Emptor: These are starting points for you and your car. Be ready and willing to change them based on your preferences and local conditions. These alignment settings might be a bit tricky in the rain and even trickier in snow or ice. Your tires will wear a bit faster then the stock alignment settings. If that's a concern of yours, stay with the stock numbers and don't ask me dumb quesiton like, "Well... how much faster will they wear?" or "How many miles will the tires last with the Track alignment setting?" If you're asking those questions you shouldn't be reading this thread. Go buy a Honda... :-)
----- John Coffey, Fabricator at Benton Performance, LLC

#2 jgkurz

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Posted 19 October 2007 - 03:15 PM

I vote for sticky!

This is for S30 and S130. Correct?

#3 JMortensen

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Posted 19 October 2007 - 03:16 PM

I'd go with a bit of toe in on the front for the street alignment if you don't like a car that wanders...

Jon Mortensen, owner/operator www.petdoorstore.com


#4 johnc

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Posted 19 October 2007 - 03:23 PM

S30 only and front toe is really up to each person's preference. What I'm recommending above for the street are settings for "spirited" driving.
----- John Coffey, Fabricator at Benton Performance, LLC

#5 IdfMF

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Posted 19 October 2007 - 04:00 PM

Excellent info and just what I needed.

Thanks, John

Tom

#6 Clifton

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Posted 19 October 2007 - 04:24 PM

Your ride height would depend on wheel diameter/tire diameter. What diameter are your basing them on?.

#7 johnc

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Posted 19 October 2007 - 04:40 PM

For 225s through 245s I figured a tire diameter around from 23" to 24". For anything larger I figured a tire diameter around 25".

Guys, let's not burrow into detailed setups for cars with 285/35-18s, painted blue, with gold spinners, dirt tracked on Saturday, and driven to church on Sunday. The settings I posted above are general starting points and are meant to get someone close. From these starting points a person should adjust for their specific vehicle based on testing and driver preferences.
----- John Coffey, Fabricator at Benton Performance, LLC

#8 1 tuff z

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Posted 19 October 2007 - 06:01 PM

john, thanks:hail:much for posting these specs. once again, you prove to be a great resource.

may i add one little correction. the latin phrase you use at the end, i believe should be "caveat utilitor" for "user beware", not "caveat emptor" buyer beware...lol!

david

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"A lot of people go through life doing things badly.  Racing's important to men who do it well.  When you're racing, it... it's life.  Anything that happens before or after... is just waiting."  1971 film "Le Mans"  driver Michael Delaney, played by Steve McQueen


#9 Thumper

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Posted 20 October 2007 - 06:23 AM

John, what about a bonneville flats speed car. Would you stick with the street setup or have different settings? Thanks


#10 mario_82_ZXT

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Posted 20 October 2007 - 07:32 AM

John, what about a bonneville flats speed car. Would you stick with the street setup or have different settings? Thanks

I believe it's completely different. My friend building a Z for LSR was telling me the specs a while back, but I sadly can't remember them. All I remember was run as much caster as possible but still allowed within the rules and your car.

The specs might actually be in the rule book for the salt flats.
Mario
78 280z | Back to L28ET in progress
77 280z | $200 parts car turned daily driver
76 280zT | Dad's car (L28ET, MSnS-E, Big IC, 14psi) DAILY DRIVER

#11 Clifton

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Posted 20 October 2007 - 07:47 AM

what about a bonneville flats speed car. Would you stick with the street setup or have different settings? Thanks


I wouldn't want a little toe out (street 1/16" out or 0) on that. atleast 1/16" in. Don't need camber either. More caster would be good.

#12 kyle

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Posted 25 October 2007 - 10:18 AM

Track/Autocross
For 225 to 245 width radial DOT tires try these alignment settings:
Front
Camber: 3 to 3.25 neg
Rear
Camber: 2.5 to 3 neg


Hi John- looks like you're suggesting -.25 to -.5 more camber in the front. I lack adjustability, but do not lack a drill; planning to relocate the lca pivot for the camber.

What sway bars are you factoring in to those camber numbers?

#13 Nismo280zEd

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Posted 26 October 2007 - 01:57 PM

I run a welded diff in my 240 and found that running zero toe upfront dramatically helped me turn. I also run about 1.5-1.7neg camber all round on the street. Works great. Just wanted to say I run similar settings after much trial and error and they work great.

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#14 midnightmoonlight

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Posted 10 June 2008 - 11:54 AM

What about cantilever slick allingment? bias ply 23x9x15 ect. I think Im going with 1.5 front and 1 in the rear, 5-6 caster, 1/4 toe for autox. This will be my initial setup and see how it goes
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#15 johnc

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Posted 10 June 2008 - 12:09 PM

Guys, as I said above, I'm not going to get into specific alignment numbers. I can spend a hour a day posting in this thread and its not worth my time to do that.
----- John Coffey, Fabricator at Benton Performance, LLC

#16 midnightmoonlight

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Posted 12 June 2008 - 05:45 AM

Cantilever slicks need alot less camber then dot r6 and a6. I just thought having these numbers would complete your list. They only need 1-2 degrees from what I understand.
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#17 zr240

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Posted 23 June 2008 - 02:44 PM

I find with toe out on the front my race car wanders a bit under heavy braking

Race car with 285 slicks all round

I like to run 1-2mm toe in

Ash

#18 braq

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Posted 22 February 2010 - 05:01 AM

Hi,
Yes its normal since you have now changed the factory settings that would allow the vehicle to travel straight..........

#19 zredbaron

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Posted 11 March 2011 - 08:07 PM

Guys, let's not burrow into detailed setups for cars with 285/35-18s, painted blue, with gold spinners, dirt tracked on Saturday, and driven to church on Sunday.


Haha, I love stumbling upon these comments unexpectedly...

Thanks John and to everyone else who contributed their setups. Great thread!

Mark Haag
3.1L '71 240Z for autocross (XP). 2009 repaint, 2011 fabrication, 2011 race motor (RIP).

"Oh my god, how do you steer this thing???  It's like a tractor with that manual steering!!" --AS national competitor (Z06 type)


#20 Easy Does It

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Posted 06 April 2011 - 03:57 PM

My car is going into the shop for an alignment. Exactly what I was seeking
Thank you.




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