Darting only on right sweeper turns - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

 
LinkBack Thread Tools Display Modes
post #1 of 15 (permalink) Old Apr 24th, 12, 05:41 PM Thread Starter
Eric
 
Join Date: Apr 2012
Location: Orange County
Posts: 8
Darting only on right sweeper turns

Hello,
I have 69 Camaro with that I have done much work to:
CPP front control arms
CPP front lowering springs
Bilstien shocks
Bump steer tie rod ends
Hotchkis rear lowering leaf springs
Welded custom made subframe connectors
350 engine with thumper cam, edelbrock performer heads, roller rockers, intake, headers, holley. Sounds like Nascar.
New power steering to replace old manuel box
New True track diff with 4:10 gears
New Tremec 5 speed.
17" wheels from PS Engineering.

The issue with the car is that after multiple alignments it still darts on right sweeper turns. It always retirns to center but it darts and feels like the up and down motion of the road is transferred to a side to side motion in the seat of my pants and the passenger. Left turns are beautiful with no abnormal motion. It almost feels like it tracks every groove or undulation on the road only on right turns that are sweepers.

Any ideas for a cure would be appreciated.

Thanks, Eric
Fathom Green is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old Apr 24th, 12, 05:59 PM
Senior Tech
Al
 
Join Date: Jun 2007
Location: Iowa
Posts: 1,652
Re: Darting only on right sweeper turns

Eric, My first guess would be a problem with a belt or belts in the left front tire.
Switch the left with the right and try it. Second guess is possibly a bad spot in
the steering gear. That is assuming all other front suspension parts are tight.
allanjs is offline  
post #3 of 15 (permalink) Old Apr 24th, 12, 08:19 PM Thread Starter
Eric
 
Join Date: Apr 2012
Location: Orange County
Posts: 8
Re: Darting only on right sweeper turns

Hi Al,

Thanks for the info. The suspension is tight and new and I have switched tires.

You may be on to something with the steering.

Will check..
Thank You,

Eric
Fathom Green is offline  
post #4 of 15 (permalink) Old Apr 25th, 12, 07:37 PM
ern
Team Member
ern
 
Join Date: Jan 2010
Location: nova scotia canada
Posts: 171
Re: Darting only on right sweeper turns

hi eric it is called tramlining, i have the same issue only mine does it both ways.i assume you have wide front tires,they say n camber makes it worse,i am off to the alignment store but would like to know your specs. they some more toe-in helps,abd some say a different type of tire and lower air pressure helps. if you fix it please let me know ,
Attached Thumbnails
Click image for larger version

Name:	Picture 037.jpg
Views:	45
Size:	147.9 KB
ID:	28137   Click image for larger version

Name:	Picture 561.jpg
Views:	70
Size:	111.1 KB
ID:	28138   Click image for larger version

Name:	Picture 030.jpg
Views:	46
Size:	82.6 KB
ID:	28139  
ern is offline  
post #5 of 15 (permalink) Old Apr 25th, 12, 08:47 PM
Gold Lifetime Member
Robert
 
ROBS6T8's Avatar
 
Join Date: Mar 2005
Location: Templeton, Ca USA
Posts: 2,268
Re: Darting only on right sweeper turns

Ern, what LCA's are you running? I'm assumming the pic you have of the suspension is not complete. The adjusters are not tightened and the sway bar is just hanging there!

68 Camaro SS... getting there!!
"If happiness is in your destiny, you need not be in a hurry."
If I can only convince myself of this!

My slooow build thread http://www.camaros.net/forums/133-build-projects/180476-project-orangasm.html
ROBS6T8 is offline  
post #6 of 15 (permalink) Old Apr 26th, 12, 08:05 AM
Senior Tech
 
Join Date: May 2004
Location: connecticut
Posts: 465
Re: Darting only on right sweeper turns

going through the same problem
rebuilt front end still the same
the posi rear is the next culprit
bills69 is offline  
post #7 of 15 (permalink) Old Apr 26th, 12, 05:23 PM
ern
Team Member
ern
 
Join Date: Jan 2010
Location: nova scotia canada
Posts: 171
Re: Darting only on right sweeper turns

eric do you have the alignment specs ,mine does the same only both ways
ern is offline  
post #8 of 15 (permalink) Old Apr 26th, 12, 05:29 PM
ern
Team Member
ern
 
Join Date: Jan 2010
Location: nova scotia canada
Posts: 171
Re: Darting only on right sweeper turns

robert they are right stuff control arms, nice piece fit very well had them painted, and yes the pictures were from a month ago all is together but i did find that the idler arm was new but so tight the it would not let the steering work so i replaced it works better but still strange feelin. any thoughts on specs would be great
ern is offline  
post #9 of 15 (permalink) Old Apr 26th, 12, 08:37 PM Thread Starter
Eric
 
Join Date: Apr 2012
Location: Orange County
Posts: 8
Re: Darting only on right sweeper turns

Men,

I will get specs and post.
My rear diff is out right now.
Maybe rear is stepping out due to diff.
Thank You, Eric
Fathom Green is offline  
post #10 of 15 (permalink) Old Apr 26th, 12, 08:39 PM Thread Starter
Eric
 
Join Date: Apr 2012
Location: Orange County
Posts: 8
Re: Darting only on right sweeper turns

Hi Ern,

Maybe you are on to something with the negative camber.
Thanks .
Again I will advise specs.
Eric
Fathom Green is offline  
post #11 of 15 (permalink) Old Apr 26th, 12, 08:47 PM
Senior Tech
Steiner
 
Join Date: Mar 2009
Location: Lyman, SC
Posts: 8,347
Re: Darting only on right sweeper turns

Ern, it's probably just my eyeballs but from that angle your pitman arm looks like a truck model. Does it have a bend in it so the center link end drops about an inch or so lower than the steering box output end? Also with your tires straight forward is the center link perfectly level and parallel with the crossmember?

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft
www.cmengines.com
'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
Steiner is offline  
post #12 of 15 (permalink) Old Apr 26th, 12, 09:11 PM Thread Starter
Eric
 
Join Date: Apr 2012
Location: Orange County
Posts: 8
Lightbulb Re: Darting only on right sweeper turns

Ern,

The alignment specs are:
LEFT RIGHT
camber -1.2 - 1
caster 3.7 4.7
toe .18 .18
s.a.i. 10.2 9.8
incld angle 9.1 8.8

Any help regarding the tramlining would be appreciated.
problem is only on right turns. Crown in road moves and darts the car.
front wheels ar 8 x 17 with 245x45x17 rears are 9 x 17 with 275x 40x17.
Tires are Kuhmo Ectsa. Had same issue with the 15" Goodrich TA Radials.
Thank You
Fathom Green is offline  
post #13 of 15 (permalink) Old Apr 26th, 12, 09:16 PM
Senior Tech
Steiner
 
Join Date: Mar 2009
Location: Lyman, SC
Posts: 8,347
Re: Darting only on right sweeper turns

I run these specs on my car with great results:
Camber: -0.5 L/R
Caster: 5.0 L, 5.5 R
Toe: 1/16"

They came both from Mark at SC&C (author of "How to Make Your Muscle Car Handle") and David Pozzi.
http://www.pozziracing.com/first_gen...lignment specs

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft
www.cmengines.com
'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
Steiner is offline  
post #14 of 15 (permalink) Old Apr 26th, 12, 09:19 PM Thread Starter
Eric
 
Join Date: Apr 2012
Location: Orange County
Posts: 8
Re: Darting only on right sweeper turns

Thank you Steiner.

I will re align and advise.

Much Appreciated!

Eric
Fathom Green is offline  
post #15 of 15 (permalink) Old Apr 27th, 12, 09:06 AM
Gold Lifetime Member
Jeff
 
yellow69RS's Avatar
 
Join Date: Jul 2007
Location: Aurora, IL
Posts: 4,647
Send a message via Yahoo to yellow69RS
Re: Darting only on right sweeper turns

I like Stiener's spec alot better than Eric's. I'm really not a fan of a difference between the sides in the camber. Camber is a tire wear angle and shouldn't be used to compensate for road crown IMHO. I'm not a fan of large amounts of camber either negative or positive. That 1.5 negative might be the ticket for autocross when every last bit helps but unnecessary on the street IMHO.

Jeff
yellow69RS is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome