Reutterwerk
Go Back   Reutterwerk > Porsche Water Cooled Forums > 928 Forum

Reply
Thread Tools Display Modes
Unread 09-23-2015, 05:31 PM   #1
Carl Fausett
User
 
Carl Fausett's Avatar
 
Join Date: Nov 2008
Posts: 109
Thanks: 0
Thanked 5 Times in 4 Posts
Carl Fausett is on a distinguished road
Default New Product: Rear Camber Eccentric Bolts

Improves handling and tire wear with wide rear tires!

The Problem:
Customers find that once they install wider rear tires and wheels, their rear camber jumps to such a high degree they can no longer get even tire wear. The tire is running on the inside corners all the time. Worse, their braking and cornering performance is diminished, and they are not getting the benefit of those wide wheels and tires they just bought.

The Solution: Our custom rear camber eccentric bolts will add 3mm more camber adjustment range to your car, so you can get your rear alignment back within spec, increasing your performance and tire life.

Quality Made: We start with the Porsche® factory camber bolts, so you now they not only fit, but they are the right part for your car. We had material added to the outside of the eccentrics, then re-ground them to relocate the ellipse, and had them plated in yellow-chromate for lasting good looks and rust resistance. Top quality all the way.

Easy Installation: Instructions included. The slotted hole in the rear cross-member will need to be enlarged by 3mm to take advantage of the new camber range you have now. This can be done with a Dremel tool or die grinder with the suspension in the car.

Details here: http://www.928motorsports.com/parts/...mber_bolts.php
Attached Images
File Type: jpg Kit Includes.jpg (238.0 KB, 0 views)
File Type: jpg Before.jpg (247.5 KB, 0 views)
File Type: jpg After.jpg (248.8 KB, 0 views)
Carl Fausett is offline   Reply With Quote
Unread 09-24-2015, 09:21 PM   #2
GlenL
Workin' on it
 
GlenL's Avatar
 
Join Date: Apr 2009
Location: Minneapolis
Posts: 941
Thanks: 91
Thanked 85 Times in 77 Posts
GlenL will become famous soon enoughGlenL will become famous soon enough
Garage
Default

Carl... I like it.

Any thoughts on mods to get more camber in front?

I tried modding the eccentric for my '80 to get more motion there. Only a faction of a degree better. What I was thinking would really be cool was a new ball joint assembly. Something like a steel bar machined to use the eccentrics with a replaceable ball joint on the end. The trick would be to make it a bit longer than the stock ball joint. Some quick math shows that 5mm would build in 1 degree more camber.
__________________
1980 928S Euro x2
1987 944 N/A
GlenL is offline   Reply With Quote
Unread 09-25-2015, 12:03 PM   #3
Carl Fausett
User
 
Carl Fausett's Avatar
 
Join Date: Nov 2008
Posts: 109
Thanks: 0
Thanked 5 Times in 4 Posts
Carl Fausett is on a distinguished road
Default

Because you have an early car, it's really easy to get more camber in front. You simply swap in late model upper a-arms (they are shorter) but continue to use the early lower a arm you have now. You will come away with about -2.5 front camber.
Carl Fausett is offline   Reply With Quote
Unread 09-25-2015, 12:57 PM   #4
Carl Fausett
User
 
Carl Fausett's Avatar
 
Join Date: Nov 2008
Posts: 109
Thanks: 0
Thanked 5 Times in 4 Posts
Carl Fausett is on a distinguished road
Default

Installing our steel late-model upper a-arms has been a popular option for that

http://www.928motorsports.com/parts/...eplacement.php
Carl Fausett is offline   Reply With Quote
Unread 09-25-2015, 04:05 PM   #5
GlenL
Workin' on it
 
GlenL's Avatar
 
Join Date: Apr 2009
Location: Minneapolis
Posts: 941
Thanks: 91
Thanked 85 Times in 77 Posts
GlenL will become famous soon enoughGlenL will become famous soon enough
Garage
Default

Carl...

I've got two sets of the upper arms with one installed. The problem is the angle of the ball joint can bind when the wheel is up high in the wheelwell. That's whether it's compressed a lot or low ride height or a combination of both.
__________________
1980 928S Euro x2
1987 944 N/A
GlenL is offline   Reply With Quote
Unread 09-25-2015, 05:05 PM   #6
Carl Fausett
User
 
Carl Fausett's Avatar
 
Join Date: Nov 2008
Posts: 109
Thanks: 0
Thanked 5 Times in 4 Posts
Carl Fausett is on a distinguished road
Default

True! I am not one who has run the late upper a arms with the early lower arms, but maybe the guys who do run enough spring that the suspension travel is minimal.

My spring travel on my 928 is about 1.5" in the front, and 0.75" in the rear.
Carl Fausett is offline   Reply With Quote
Unread 09-26-2015, 11:30 AM   #7
GlenL
Workin' on it
 
GlenL's Avatar
 
Join Date: Apr 2009
Location: Minneapolis
Posts: 941
Thanks: 91
Thanked 85 Times in 77 Posts
GlenL will become famous soon enoughGlenL will become famous soon enough
Garage
Default

I took a look at it and the bind point was with the wheel really "up there." (Not good science.) I went with it. Running 155mm ride height and 450lb/in springs so I thought it was "safe." So far, so good.

Extended ball joints or eccentrics would be better and much easier to install. The only downside is the shorter upper arms move the tire in and away from the fender so can get a smidgen wider tire. Maybe an extra 10mm in width.
__________________
1980 928S Euro x2
1987 944 N/A
GlenL is offline   Reply With Quote
Unread 09-28-2015, 10:33 AM   #8
Carl Fausett
User
 
Carl Fausett's Avatar
 
Join Date: Nov 2008
Posts: 109
Thanks: 0
Thanked 5 Times in 4 Posts
Carl Fausett is on a distinguished road
Default

450 lb springs are not very stiff... if you want to race I would recommend a minimum of 600 fronts and 450 rears. Just an FYI. Very good combo for the 928, and completely street-able too.
Carl Fausett is offline   Reply With Quote
Unread 09-28-2015, 12:07 PM   #9
GlenL
Workin' on it
 
GlenL's Avatar
 
Join Date: Apr 2009
Location: Minneapolis
Posts: 941
Thanks: 91
Thanked 85 Times in 77 Posts
GlenL will become famous soon enoughGlenL will become famous soon enough
Garage
Default

Quote:
Originally Posted by Carl Fausett View Post
450 lb springs are not very stiff... if you want to race I would recommend a minimum of 600 fronts and 450 rears. Just an FYI. Very good combo for the 928, and completely street-able too.
Yep. I've heard that before. It's a good improvement for my dual-use car and, with stiffly-set Koni's, is a bit rough around town. I'll run 16" wheels with tires at 32psi and it's comfortable in-town.
__________________
1980 928S Euro x2
1987 944 N/A
GlenL is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 06:09 PM.

Kirsch designed by Andrew & Austin


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
DTO Garage vBulletin Plugins by Drive Thru Online, Inc.
Copyright © 2008 - 2024, Reutterwerk.com