Road Racing / Autocross & Time Attack Road Racing / AUTOX, HPDE, Time Attack

Can I Be More Alignment Aggressive?

Thread Tools
 
Search this Thread
 
Old Jul 8, 2006 | 02:56 PM
  #1  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Can I be more aggressive

on my alignment? See below the current alignment which was done almost an year back Front: corss camber: 0.0 deg, coss caster: 0.3 deg, total toe: -1.88 deg
Rear : thrust angle: -0.01 deg, total toe: -0.03 deg

When I posted here some time back, the reccomendations were
Front: 1/8th of Toe-out in the front. That's -0.06 each corner for a total of -0.12
Rear: slight toe-in the rear: +0.03 to +0.05 each corner for a total of +0.06 or +0.10. If you want the car to rotate better then run some toe-out in the rear
like 1/12th toe-out: -0.03 each wheel for a total of -0.06".

btw Car is a 99 GSR running on 400 Front and 450 Rear GC's and Koni yellows. Type-R rear sway bar, wrapped in Falken Azenis, Corner weighed etc
I also have another car as a daily driver so Integra is NOT driven on a daily basis/ long commutes etc but I do drive it on the streets regularly.
Since tire wear, comfort etc are not a major concern, I think its OK to go with some aggressive settings.

Based on my current set up, should I be making the alignemnt change? Is it going to make some difference? thanks for your inputs
Thanks

Reply
Old Jul 8, 2006 | 05:32 PM
  #2  
WRXRacer111's Avatar
Honda-Tech Member
 
Joined: Feb 2000
Posts: 2,159
Likes: 0
From: Richmond VA
Default Re: Can I be more aggressive (schumi)

track, i'd go with zero toe all around.

autox, put 1/8" toe out up front to make it turn in a little quicker. I don't like toe-in at the back end of those cars, even with a 400/500 spring setup on Yellows and a ITR rear bar, it's pretty neutral so long as you don't jerk the wheel where you shouldn't.
Reply
Old Jul 8, 2006 | 05:39 PM
  #3  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (WRXRacer111)

any comments on my current alignment settings?

After the new alignemnt setiing, should I be seeing some noticebale differences?

thanks


Modified by schumi at 3:49 PM 7/9/2006


Modified by schumi at 5:42 PM 7/9/2006
Reply
Old Jul 9, 2006 | 08:44 AM
  #4  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (schumi)

what I am trying to find out is, given my current set up which is mentioned above should I be spending money for a new alignment set up ?
Reply
Old Jul 10, 2006 | 10:16 AM
  #5  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (schumi)

some one should have some comments
Reply
Old Jul 11, 2006 | 03:10 PM
  #6  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (schumi)

to top
Reply
Old Jul 11, 2006 | 03:58 PM
  #7  
thawley's Avatar
Honda-Tech Member
 
Joined: Mar 2004
Posts: 1,349
Likes: 0
From: Orange County, CA
Default Re: Can I be more aggressive (schumi)

Most of the guys who REALLY play with this have gone to other forums.

I run zero toe in the rear wherever I go. The front varies with the type of track I'm running:
• Willow Springs/Cal Speedway (fast with LOOooong straights I run zero front toe
• Button Willow/Streets of Willow (tighter, more technical with more turns) I run 1/16" to 5/32" front toe out.

This is only my first season playing with alignment, so I am hardly an expert. Seems though that the more toe you give it (front) the better the turn-in. Down sides are inncreased tire wear, lower top speed and poorer stability under braking.

Any toe beyond zero at the rear will give you a loose condition. I have yet to meet a driver/crew chief who thinks that that is a good idea, but I haven't met them all yet...

Thawley -- now with more aero


Photo by Casey Heerman
Reply
Old Jul 11, 2006 | 04:18 PM
  #8  
Chris F's Avatar
Senior Member
 
Joined: Jun 2004
Posts: 10,399
Likes: 3
From: Chicagoland, IL
Default Re: Can I be more aggressive (schumi)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">Front: corss camber: 0.0 deg, coss caster: 0.3 deg, total toe: -1.88 deg</TD></TR></TABLE>

Your camber is crap. Get more camber.

Your toe is ABSOLUTE crap too. Way too much. That's like 3/4 inch total toe out. Start at zero and add toe out to compensate for understeer and slow turn-in for autocross.

http://www.google.com/search?h...+23.5
https://honda-tech.com/zerothread?id=1061318

p.s. no bumping.

p.p.s. I ran about that much toe out once, by accident. Car felt VERY wandery, sorta floated down the road in whichever direction it wanted. It'll feel better with less toe.
Reply
Old Jul 11, 2006 | 05:06 PM
  #9  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (Chris F)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris F &raquo;</TD></TR><TR><TD CLASS="quote">
Why would switching from a 16" low profile tire to a 14" high profile tire change your toe? The DEGREES don't change, but the inches would if you use wheel instead of tire as your diameter measurement.
</TD></TR></TABLE>

Above quote is from one of the links posted.....

Does this mean that, one should get the alignmment in the same wheel +tire they are planning to run? I am so confused
Reply
Old Jul 11, 2006 | 05:08 PM
  #10  
Chris F's Avatar
Senior Member
 
Joined: Jun 2004
Posts: 10,399
Likes: 3
From: Chicagoland, IL
Default Re: Can I be more aggressive (schumi)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">

Above quote is from one of the links posted.....

Does this mean that, one should get the alignmment in the same wheel +tire they are planning to run? I am so confused
</TD></TR></TABLE>

Nah! The degrees are the same. The "inches" are easier to measure, depending on how you align it, and will change with the wheel diameter and measurement point. I've been assuming outer edge of the tire when converting inches to degrees.
Reply
Old Jul 12, 2006 | 07:15 AM
  #11  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (Chris F)

So, one shuld ask the shop to do the alignment in Degrees NOT in inches.....
Reply
Old Jul 12, 2006 | 07:45 AM
  #12  
Chris F's Avatar
Senior Member
 
Joined: Jun 2004
Posts: 10,399
Likes: 3
From: Chicagoland, IL
Default Re: Can I be more aggressive (schumi)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">So, one shuld ask the shop to do the alignment in Degrees NOT in inches..... </TD></TR></TABLE>
Unless it's a race alignment shop, they probably won't know how to measure it in inches. (to answer your question, yes, you're more likely to get what you expect if you ask for it in degrees.)
Reply
Old Jul 12, 2006 | 09:01 AM
  #13  
WRXRacer111's Avatar
Honda-Tech Member
 
Joined: Feb 2000
Posts: 2,159
Likes: 0
From: Richmond VA
Default Re: Can I be more aggressive (Chris F)

I don't know when they started, but newer Hunter machines can do both degrees and inches. 2 button clicks or so on the setup screen.
Reply
Old Jul 12, 2006 | 11:08 AM
  #14  
o-man's Avatar
Honda-Tech Member
 
Joined: Mar 2001
Posts: 750
Likes: 0
From: living too close to Karl, everythings busted, nc
Default Re: Can I be more aggressive (WRXRacer111)

Most shops have a conversion chart. It is usually attached to the computer stand for the alignment machine
Reply
Old Jul 12, 2006 | 12:43 PM
  #15  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (WRXRacer111)

How much camber should I run?

Anything else I could specify apart from the toe specs?

Planning to have toe-in of -0.06 each corner at Front and rear toe out (+0.04)

What about cross caster?
Reply
Old Jul 12, 2006 | 01:14 PM
  #16  
WRXRacer111's Avatar
Honda-Tech Member
 
Joined: Feb 2000
Posts: 2,159
Likes: 0
From: Richmond VA
Default Re: Can I be more aggressive (schumi)

Do you have caster and/or camber adjustability? If not, then don't worry about it... -2.5 degrees camber is a good place to start at the front end.

Lowering the front end until you get -2 to -2.2 worked pretty well for a DC2 GS-R I set up on 400/500 springs on Koni Sports in the past, but if your particular car doesn't want to gain that camber easily, don't drop the car so low that you start pounding bumpstops/shocks/underbody etc. I'd much rather have not-enough negative camber than not-enough compression travel.
Reply
Old Jul 12, 2006 | 05:49 PM
  #17  
o-man's Avatar
Honda-Tech Member
 
Joined: Mar 2001
Posts: 750
Likes: 0
From: living too close to Karl, everythings busted, nc
Default Re: Can I be more aggressive (schumi)

[QUOTE=schumi] toe-in of -0.06 each corner at Front and rear toe out (+0.04)
QUOTE]
Actually toe out is negative and toe in is positive. If you don't have adjustable upper control arms/ball joints, caster wont be adjustable
Reply
Old Jul 12, 2006 | 06:42 PM
  #18  
Chris F's Avatar
Senior Member
 
Joined: Jun 2004
Posts: 10,399
Likes: 3
From: Chicagoland, IL
Default Re: Can I be more aggressive (schumi)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">How much camber should I run?

Anything else I could specify apart from the toe specs?

Planning to have toe-in of -0.06 each corner at Front and rear toe out (+0.04)

What about cross caster?</TD></TR></TABLE>

Check tire specs for camber. 3-5 is what Toyo recomments. Also check tire temps.

Where did you pull those toe numbers from? Thawley gave pretty good toe advice above. If you don't get it, get zero toe and just go drive.
Reply
Old Jul 12, 2006 | 07:35 PM
  #19  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (Chris F)

Whn I requested for alignment settings some time back, the general response I got for a GSR auto-x setup was "Front: 1/8th of Toe-out in the front. That's -0.06 each corner for a total of -0.12
Rear: slight toe-in the rear: +0.03 to +0.05 each corner for a total of +0.06 or +0.10. If you want the car to rotate better then run some toe-out in the rearlike 1/12th toe-out: -0.03 each wheel for a total of -0.06".


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris F &raquo;</TD></TR><TR><TD CLASS="quote">
Where did you pull those toe numbers from? Thawley gave pretty good toe advice above. If you don't get it, get zero toe and just go drive.</TD></TR></TABLE>

The set up given by Thawley seems to be more for track/HPDE ???

where do you get the reccomended camber specs for a tire? Its not avaiable in the Falken web site for Azenis . Not too worried about tire wear since its not a daily driver
Reply
Old Jul 12, 2006 | 07:43 PM
  #20  
Chris F's Avatar
Senior Member
 
Joined: Jun 2004
Posts: 10,399
Likes: 3
From: Chicagoland, IL
Default Re: Can I be more aggressive (schumi)

Guess I was confused by "Planning to have toe-in" .. you want toe out. If you want to run negative toe in, well, I guess that's fine
Reply
Old Jul 13, 2006 | 08:19 PM
  #21  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (Chris F)

Will let you all know in a couple of days how it feels after the change

Hopefully that floaty feel is gone
Reply
Old Jul 14, 2006 | 05:19 PM
  #22  
schumi's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2003
Posts: 416
Likes: 0
Default Re: Can I be more aggressive (schumi)

scheduled for this week end
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
gearhead313
Suspension & Brakes
14
Nov 11, 2012 09:42 AM
Natural Aspirations
Road Racing / Autocross & Time Attack
27
Jul 17, 2011 04:06 PM
ghettoracer
Road Racing / Autocross & Time Attack
34
Aug 5, 2003 09:22 AM
Flux
Road Racing / Autocross & Time Attack
1
Jun 8, 2003 07:47 AM
alu95
Road Racing / Autocross & Time Attack
10
Mar 21, 2003 12:50 PM




All times are GMT -8. The time now is 10:18 PM.