Mazda Rotary Club

General => General Technical => Wheels & Tyres, Suspension & Brakes => Topic started by: Fish on November 25, 2002, 09:48:51 PM

Title: Geometry???
Post by: Fish on November 25, 2002, 09:48:51 PM
I have my first trackday on Saturday at Bedford, and wondered what geometry settings I should try running first, before changing for my next outing.

Thanks Dan :confused:
Title: Geometry???
Post by: MikeLMR on November 26, 2002, 12:07:44 PM
the settings as recomended by Mazda ?
Title: Geometry???
Post by: hIGGI on November 26, 2002, 06:10:51 PM
i have my alignment sheet here on paper, what specs exactly u need ?

STREET/Auto Cross/Long Track or Short Track ?

what size of wheels ?
Title: Geometry???
Post by: Fish on November 27, 2002, 07:50:47 PM
The trackday that I am taking part in on Saturday is a 3.6 mile circuit, quite quick as they go.

I dont mind inside edge wear, but just want it to be stable on bends.

Thanks Dan
Title: Geometry???
Post by: Glenn Butcher on November 27, 2002, 08:05:02 PM
Hey Dan!

Sorry I have not replied to this mate.  As I mentioned in the other email, I had the following done by Chris Wilson:

- Around 1.5 negative degrees on the front
- I think up to 3 degrees positive caster on the front
- 1.0 negative on the rear
- A little toe out on the front
- A little toe in on the back for stability at high speed.

Make sure you put some good brake fluid in.

Take some spare oil, and it wouldn\'t hurt to run some 2 stroke pre-mix in the fuel.

Hope this helps - and enjoy yourself mate!
Title: Geometry???
Post by: Fish on November 28, 2002, 04:28:18 PM
Glen, thanks for the reply. Although I didnt see it until Gary Marks pointed it out to me today, and I had already had the settings done.

I have had the following setup done, so shall see how I get on with this.

Front:

Caster = 6\'
Camber = -.4\'
Toe = .03\'

Rear:

Camber = -1\'
Toe = .3
Thrust = .01\'

So lets see what this does, and adjust for the next time out.

Dan

PS. I begrudge going to someone that is on a list that is meant to be an ONWERS list, helping each other out. Not someone that just wants to get work out of the users of that list. :(
Title: Geometry???
Post by: hIGGI on November 29, 2002, 10:27:43 AM
STREET
16" wheels: front; toe 1/16" in, camber -1.2, caster +6.0: rear; toe 0, camber -1.1
17" wheels: front; same as 16" except camber becomes -0.9: rear; same as 16" except camber becomes -0.3
18" wheels: front; same as 16" except camber becomes -0.8: rear; same as 16" except camber becomes 0.0

LONG TRACK EVENT
16" wheels: front; toe 1/16" in, camber -1.5, caster +6.0: rear; toe 0, camber -1.3
17" wheels: front; same as 16" except camber becomes -0.9: rear; same as 16" except camber becomes -0.5
18" wheels: front; same as 16" except camber becomes -0.8: rear; same as 16" except camber becomes -0.2

SHORT TRACK EVENT
16" wheels: front; toe 0, camber -1.8, caster +6.0: rear; toe 0, camber -1.5
17" wheels: front; same as 16" except camber becomes -1.1: rear; same as 16" except camber becomes -0.5
18" wheels: front; same as 16" except camber becomes -1.0: rear; same as 16" except camber becomes -0.2

AUTO CROSS
16" wheels: front; toe 1/16" out, camber -1.8, caster +6.0: rear; toe 0, camber -1.5
17" wheels: front; same as 16" except camber becomes -1.3: rear; same as 16" except camber becomes -0.5
18" wheels: front; same as 16" except camber becomes -1.1: rear; same as 16" except camber becomes -0.4
Title: Geometry???
Post by: Grizzly on January 16, 2003, 10:41:54 PM
Does this apply to the Turbo 2?

Chris
Title: Geometry???
Post by: Fish on January 17, 2003, 11:39:55 AM
Chris, there is no reason why these settings cannot be applied to a TII.

Dan
Title: Geometry???
Post by: hIGGI on January 17, 2003, 05:32:15 PM
those specs were posted in 2nd gen forum and i will follow it on my TII but it could be applied for FD or SA/FB since suspension and weight distribution is similar....