Tracking Settings

[Pug620]

Hi

Is their any gain by setting tracking diffrent from manufactures settings to gain better handling or turn in ?

Mainly for front wheel drive any advice or just set to standard?

Marty

[graham bahr]

yes, no, sometimes!!! it all depends on the rest of the car and set up, if your talking about a basically std car, then probably not, more tow out will usually give better traction and turn in but results in poorer straightline stability, oh and unless your cars well sorted bald tyres on the inside edges

[R59]

About 40' of toe-out on the front, as a max, on tighter circuits (like Lydden, or Mallory), but you lose a little straightline. Faster circuits, drop it to 20-30' (test first to get the best setting).

Then there's the back end.... 40' toe out, with 30' on the n/s, 10' on the o/s. Makes it rear steer a bit!! Takes some getting used-to, but once you have it mastered....

Camber needs to be adjusted too. On road tyres, no more than about 2.5deg neg on the front, you can run 3 with slicks. 1deg neg on the back max.

Rob.

[Chris Y]

Can I just clear something up? Rob, I presume you're talking about 'minutes' of a degree, when you use the ' symbol - so you have a max of 40 'minutes' of toe-out on the front. Is that out of 60? I.e 60 minutes to a degree? Never quite got my head around fractions of degrees

40/60 would then be 2/3rds of a degree

[Tim Falce]

Using minutes of a degree will be fine until metric time is introduced next year. This will have 100 minutes in and hour and 100 seconds in a minute and ten hours per day. So that means you will have to have one wheel pointing forwards and the other turning left which is not much help on UK circuits but fine in France.

[R59]

Thanks Eric.

In one degree you have 60 minutes ('), and in each minute, you have 60 seconds (").

So, 40' of toe out is 0.66deg.

Since most Dunflop opitcal guages are calibrated in degrees minutes and seconds, that's how I've learned to work.

As for the Metric Minute, with the working time directive, now fully in force in the UK, you can't have any more than 48 minutes in your degree under EU rules. You have to discard the other 52 metric minutes as they are no longer available to you. Within those 48 minutes that you are allowed, you may have ones that you don't need, these will be marked available, and count just as if you did use them. ;-)

Rob.

[maddogf3]

Lets Clear this . If rear track is set with a differential i.e. 1/16 oneside 3/16 the other then the car will crab slightly, compensated buy a small steering correction .As weight comes off inside wheel it will load up outside and a steering corection will be needed You might feel this is "tucking it in" because of steering correction ,dont be fooled . set them equal with either toe in or nearer parallel ."toe in" giving more stability be warned though if a wheel lifts of tarmac or loose surface a major steering input will be required ( Commonly referred to as instabilty . Another problem with excessive toe in is friction wouldn't you like to have the tyres running in a straight line .Tracking is not the answer.Having said that some drivers perfer a twitchy car gives feel through the wheel, Others like a stable car. LAP TIMES are the important thing for qualifying Stable for the race ( In theory anyway )
That covers the rear of the car the front is a bit different . Will be happy to pass my feeling on, if any one want's to hear them ! or should I keep my trap shut ? Bye for now