Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Competition alignment, how much negative camber
Trekkor
post Feb 3 2006, 11:33 PM
Post #1


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
What's the magic number?

I want to do the suspension bushings and set-up the alignment at the same time.

Looking for the best possible results on the track.

thanks

KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Feb 3 2006, 11:39 PM
Post #2


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
what tires?


some like lots... some like little....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MattR
post Feb 3 2006, 11:44 PM
Post #3


Advanced Member
****

Group: Members
Posts: 3,279
Joined: 23-January 04
From: SF Bay Area
Member No.: 1,589
Region Association: Northern California
Aaron is right.

What tires? What is the rest of your setup?

Someone on the board (brad) is good enough to give you a starting point, but fine tuning takes track time and experience.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Feb 3 2006, 11:44 PM
Post #4


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
Kumho 710's. (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DanT
post Feb 3 2006, 11:58 PM
Post #5


Going back to the Dark Side!
****

Group: Members
Posts: 4,300
Joined: 4-October 04
From: Auburn, CA
Member No.: 2,880
Region Association: None
From tirerack
"NOTES: While ECSTA V710 tires have an inflated shape with rounded shoulders to complement camber-challenged cars, they still benefit from vehicle alignments that offer significant negative camber."

I would start with minimum of -2deg front and -3 rear.
Are you still running stock front torsion bars.
If you are then I would possibly decrease the front slightly since it is still fairly soft on initial turn in, until the megabar kicks in. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)

180# rear springs or 225-250#s?

-2 and -3 are good starting points. Those are the settings the BI and BP cars were previously allowed. And those cars were quite competitive in AX and TT in years past.

With my car I am going to try to get all the neg I can get front and rear.
21mm front bars with stock sway,Koni adjustables front. 180# rears with Bil sports.

(IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Feb 4 2006, 12:33 AM
Post #6


Resident German
*************************

Group: Admin
Posts: 41,648
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California
QUOTE (trekkor @ Feb 3 2006, 09:33 PM)
What's the magic number?

no magick number. depends very much on the tires you're going to run ...

for example, the goodyear schlicks don't like neg. camber much ...
i've been told -1 deg. *max* ...

(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif) Andy
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Joe Ricard
post Feb 4 2006, 07:29 AM
Post #7


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
Tire pyrometer will tell you everything you need to know. and not one of them infrared kinds.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
GBallantine
post Feb 4 2006, 07:37 AM
Post #8


Member
**

Group: Members
Posts: 74
Joined: 12-October 04
From: Toronto,Ont.Canada
Member No.: 2,930
It all depends on the tire. I run Toyo Ra 1's on my Historic Production 914/4 and they recommend at least 2.5 degree camber in the front. Which is hard to achieve with a stock setup.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TimT
post Feb 4 2006, 09:15 AM
Post #9


retired
****

Group: Members
Posts: 4,033
Joined: 18-February 03
From: Wantagh, NY
Member No.: 313
QUOTE
What's the magic number


Like Joe mentioned, you have to check tire temps, and learn how camber changes affect temps. This will also educate you on proper inflation pressures..
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Feb 4 2006, 11:57 PM
Post #10


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
QUOTE
-2 and -3 are good starting points


Can these be adjusted into an unmodified car ( uncut )?

thanks


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DanT
post Feb 5 2006, 12:08 AM
Post #11


Going back to the Dark Side!
****

Group: Members
Posts: 4,300
Joined: 4-October 04
From: Auburn, CA
Member No.: 2,880
Region Association: None
If by uncut you mean completely stock...then yes.

All 3 of my previous 914s had those settings on comletely stock chassis. The 914-6 had ~ -3 on the front.

I am going to be aiming for -2.5 or more on the front.

If you are having trouble getting those numbers on the front then slot the mounting holes in the strut towers for the struts, and push them inboard. I have never had to do this but I know folks that have done it.
(IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
grantsfo
post Feb 5 2006, 10:16 AM
Post #12


Arrrrhhhh!
****

Group: Members
Posts: 4,327
Joined: 16-March 03
Member No.: 433
Region Association: None
At my cars current ride height I was able to get about -2 in the front on stock suspension mounts. I know I could use more for my Hoosiers. To get to -3 I think I would need to get a grinder and cut a bit.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Feb 5 2006, 12:30 PM
Post #13


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
"Bay Area Alignment Party"

(IMG:http://www.914world.com/bbs2/html/emoticons/party.gif)


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jhadler
post Feb 5 2006, 01:58 PM
Post #14


Long term tinkerer...
***

Group: Members
Posts: 1,879
Joined: 7-April 03
From: Lyons, CO
Member No.: 529
It totally depends on your setup.

If your car is running large torsion bars and sway bar, then you may not need very much negative camber. If it's stock suspension, then a good bit more.

No reciepie will set it for you right. Tire temps tell all. Get a good pyrometer. The cost of the pyrometer will more than be offset by the number of tires you save as a result.

Not the infrared laser pointer type. You need a good tire probe, and you need to take the temps as soon as possible when you pull off the track. In the hot pits ideally, but if not then, then as soon as you can. Tires cool quickly...

-Josh2
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Feb 5 2006, 02:15 PM
Post #15


Resident German
*************************

Group: Admin
Posts: 41,648
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California
QUOTE (trekkor @ Feb 5 2006, 10:30 AM)
"Bay Area Alignment Party"

i'm in!

well, not right away, maybe in a month or so ...

so, who has the right "tools"?
who picked up the corner balance stuff from brad's old shop? (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)

we'll need a place where we can safely get some temp into the tires.

(IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) Andy
User is online!Profile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 19th May 2024 - 07:43 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...