suspension specifications?
04-08-12, 07:13 PM
#1
Autocross Fanatic
Thread Starter
Join Date: Aug 2006
Location: arcata, CA
Posts: 54
Likes: 0
Received 0 Likes
on
0 Posts
suspension specifications?
Has anyone found or calculated suspension dimensions such as center of gravity, roll center and motion ratios? Also scrub radius and mechanical trail?
It would be really nice if there were engineering dimensions available, that would locate important points and planes like the angle of the strut tower top.
I have a factory service manual that has projected underbody dimensions and the side view has a reference line that can't be the ground (only 3.5"), does anyone know what this references, maybe the lower ball joint?
Thanks for any help and ideas.
It would be really nice if there were engineering dimensions available, that would locate important points and planes like the angle of the strut tower top.
I have a factory service manual that has projected underbody dimensions and the side view has a reference line that can't be the ground (only 3.5"), does anyone know what this references, maybe the lower ball joint?
Thanks for any help and ideas.
04-15-12, 02:56 PM
#2
Autocross Fanatic
Thread Starter
Join Date: Aug 2006
Location: arcata, CA
Posts: 54
Likes: 0
Received 0 Likes
on
0 Posts
Have any fellow autocrossers and racers ever gone into this detail of our suspension? I know all this data can be physically measured but I am hoping for a gracious gift of information or perhaps a source of factory engineering drawings if they exist to the general public.
04-15-12, 03:02 PM
#3
Autocross Fanatic
Thread Starter
Join Date: Aug 2006
Location: arcata, CA
Posts: 54
Likes: 0
Received 0 Likes
on
0 Posts
Oh and I drive a 87 sport with no sunroof in STR class. And have 255/40R17 Rs-3's on 17x8's with 27mm offset, if anyone was curious.
My main goal is to have ideal suspension geometry; increase castor, king pin angle slightly, lower minimally, reduce bump steer and decrease mechanical trail. I believe I can accomplish this and be legal in street touring with an idea I have.
locally I beat most miatas except two, and our club is almost half miatas. And I am running stock everything except coilovers an tires/rims, and will soon add headers and a fuel tuner I bought for this season
My main goal is to have ideal suspension geometry; increase castor, king pin angle slightly, lower minimally, reduce bump steer and decrease mechanical trail. I believe I can accomplish this and be legal in street touring with an idea I have.
locally I beat most miatas except two, and our club is almost half miatas. And I am running stock everything except coilovers an tires/rims, and will soon add headers and a fuel tuner I bought for this season
Last edited by nauri9; 04-15-12 at 03:24 PM. Reason: to beat all miatas
04-15-12, 05:59 PM
#4
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,826
Received 2,593 Likes
on
1,842 Posts
if you do a little searching you can find most of this info, but its probably best to measure your car, as things like roll centers depend on ride height.
04-15-12, 10:22 PM
#6
Autocross Fanatic
Thread Starter
Join Date: Aug 2006
Location: arcata, CA
Posts: 54
Likes: 0
Received 0 Likes
on
0 Posts
Oh and of course I found all the basic stuff like king pin angle, castor angle, camber angle and ride height.
The Rx-7 book by Jack k. Yamaguchi provides a lot of info on the KM hub, and my driving experience has told me to leave it alone; smooth turn initiation makes the rear steer very predictable and desirable.
The Rx-7 book by Jack k. Yamaguchi provides a lot of info on the KM hub, and my driving experience has told me to leave it alone; smooth turn initiation makes the rear steer very predictable and desirable.
04-17-12, 09:31 PM
#7
trying to build a racecar
There's no such thing as "ideal". It's all a series of compromises.
Thread
Thread Starter
Forum
Replies
Last Post
