View Single Post
Old 11-11-07, 03:10 AM   #55 (permalink)
Jim C's Avatar
Jim C
Gold Supporter
Australia
 
Join Date: Dec 2004
Location: SYDNEY, AUSTRAL
GT40: RF 105
Posts: 496
Rep Power: 8 Jim C will become famous soon enough
Re: Roaring Forties 105

The off set of moving all the scrub radius and wheel offsets ect is the Ackermann has been reduced a lot.
I have not done my measurements yet but I know it has some but not what I would like.
TUFF
I have learnt a lot doing this part of the car.
If I was to look at suspension I see things that I would not have fully under stood before.
I know I would not put the rack in the spot that this one is.
I can understand it suited the original upright but to get the scrub radius reduced you start to push the upright into the wheel and the disk gets closer to the steering arm.
Flatter disks help but this becomes an issue with wheels as the callipers move to the outside of the wheel and is likely to hit.
But if the rack is behind the wheels and high it helps with a lot of clearance problems giving you the chance to have the Ackerman that you choose not what you are left with..
The steering arms are removable and I can change the ratio if I wish.
I ended up with about .004” bump steer
The top arm at the outer ball joint can be spaced to change the roll centre height.
Attached Images
File Type: jpg DSCF0109.JPG (65.3 KB, 123 views)
__________________
Occupation Automotive
Interests are
Fabrication and design
Building my car
Sydney Australia
www.mentalperformance.com.au
Jim C is offline   Reply With Quote