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Zero Geometry Settings


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#1 Thrashed

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Posted 01 November 2015 - 10:11 PM

Hi all

Part if my winter to do list is sorting out the geometry on the zero.

I have borrowed a tracking kit and done a bit of reading on procedures.

The main questions are what order should I be adjusting components in. Eg. Camber, toe, ride height?

The second is what should the 'standard' settings for a zero be?

Thanks

#2 theduck

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Posted 01 November 2015 - 10:16 PM

Ride height
Camber
Toe

Is castor adjustable on a zero?

I would hazard a guess at 1 degree negative camber and neutral erring towards slight toe in being about right.

Edited by theduck, 01 November 2015 - 10:18 PM.


#3 Thrashed

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Posted 01 November 2015 - 10:27 PM

Caster is fixed and those settings are what I have seen but having a fixed set of numbers to work to seems better.

I have read different opinions on ride heights. Camber on the front seems to be about 1' neg and about 1mm each side toe in.

#4 knights_templar

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Posted 01 November 2015 - 10:58 PM

do not forget the rear



#5 Thrashed

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Posted 01 November 2015 - 11:27 PM

do not forget the rear


Yer. I have read the jig is/was out so one of the rear wheels kicks inward? Guess this can be fixed with a few washer behind the hub carrier?

#6 knights_templar

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Posted 02 November 2015 - 12:02 AM

Yer. I have read the jig is/was out so one of the rear wheels kicks inward? Guess this can be fixed with a few washer behind the hub carrier?

 

 

I wouldn't believe all you read, washers may be a little excessive, I used shims.



#7 Dickie

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Posted 03 November 2015 - 06:57 AM

I had to put a few shims on the RH Rear,

#8 whiz

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Posted 03 November 2015 - 07:55 AM

this is how mines is set up 

 

 

1.4 deg neg camber and 2deg toe in across the front axle. 

The car was corner weighted as well total weight of car 648kg. 734kg with me in it I'm 86kg
Left 352kg 48%
Right 382kg 52%
Axle-F 358kg 48.8%
Axle -R 376kg 51.2%
FL +RR 367 50%
FR + RL 367 50% 
We actually had 50% for all the figures which he hadn't seen for a while but I moved position. A very well balanced car.


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#9 Thrashed

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Posted 03 November 2015 - 08:35 AM

this is how mines is set up 
 
 
1.4 deg neg camber and 2deg toe in across the front axle. 
The car was corner weighted as well total weight of car 648kg. 734kg with me in it I'm 86kgLeft 352kg 48%Right 382kg 52%Axle-F 358kg 48.8%Axle -R 376kg 51.2%FL +RR 367 50%FR + RL 367 50% We actually had 50% for all the figures which he hadn't seen for a while but I moved position. A very well balanced car.


Thanks, that's good info. Any idea on the ride height? Should the front be slightly lower than the rear?

#10 mower man

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Posted 03 November 2015 - 10:33 AM

A slight rake can be beneficial ,I ran about 1/2 inch lower at front with sim figs to the above and it always seemed very planted and nice to drive   mick :crazy:


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#11 knights_templar

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Posted 03 November 2015 - 12:56 PM

All good info, but may be of no use on YOUR car.

Pretty sure Thrashed is Ford based. Mazda has diffent settings. There are also different damper lengths on some, and it may be on ATR.

1 Tyre pressures

2 Decide how you will use car. Road, track, bit of both. Take into account road condition, and possible loads.

3 Set height according to Q2, ranges 90 to 130 front, 10mm rake front to rear, think Micks was Robin Hood, take into account damper length, particularly rear.

4 Set camber front and rear, ranges from .5 to 2 dependant on Q2

5 Set track front and rear dependant on Q2

Road test car and see if it is right for you. NO Start again ☺
YES fine until you change use, or drive in different conditions.

For average use, tell the factory your spec and take their advice.

JMHO

#12 whiz

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Posted 03 November 2015 - 04:50 PM

Thanks, that's good info. Any idea on the ride height? Should the front be slightly lower than the rear?

10 mm lower at the front I running 120 front taken from behind the wishbone base of side panel 130 rear side panel at leading edge of rear wing 

Edited by whiz, 03 November 2015 - 09:20 PM.

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#13 Tim Norman

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Posted 03 November 2015 - 05:09 PM

And to add another spanner into the works, ride height affects corner weights!


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#14 Tim Norman

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Posted 03 November 2015 - 06:44 PM

"10 cm lower at the front I running 120 front taken from behind the wishbone base of side panel 130 rear side panel at leading edge of rear wing"

 

Surely thats 10mm not 4"


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#15 whiz

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Posted 03 November 2015 - 09:20 PM

"10 cm lower at the front I running 120 front taken from behind the wishbone base of side panel 130 rear side panel at leading edge of rear wing"
 
Surely thats 10mm not 4"


Typo edited above eagle eyes lol
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