Andrew, do you still want that pulley? I will be down your way tomorrow or Friday?
Cheers, Feral Errol Get Serious http://www.datrats.com.au/ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Andrew Greenbury Sent: Wednesday, December 03, 2003 11:46 AM To: [EMAIL PROTECTED] Subject: RE: 1600 handling question - understeer & bounce Gday Jeff, One of the mechanisms by which a tyre generates cornering force is conceptually similar to a spring. A spring produces a force depending on its stiffness and how much it is stretched ie the stiffer the spring the more force it produces for a given deflection. In the same way, one of the parts a tyre creates cornering force depends on its "cornering stiffness". This obviously depends on its construction etc, which you cant do much about. But one way you can increase it (up to a point) is by increasing tyre pressures, which have the effect of increasing the sidewall stiffness. This is why you increase tyre pressures on road tyres when going to track days, and why raceteams can use tyre pressure changes between front and rear as one way to tune oversteer and understeer balance. Andrew > thats interesting info, my first reaction was to lower the tyre pressure to > try to get more traction.....sounds like they need to be firmer. > > thanks for ur help.....im running at mt cotton on sunday > > cheers jeff > > > > The problem you describe is more likely to be tread squirm from under > inflation and also soft spring rates. A strut brace will not solve this. A > steering box brace will help make it feel a bit more positive. > Check the sidewalls of the tyres and see where the scrub marks are coming > to. They should not be off the treaded area of the tyre by more than 5-10 mm > depending on tyre sizes and profile used. > > The above is a bit general and hard to help with as there are so many > variable such as suspension condition etc. > > Cheers, > Feral Errol > Get Serious http://www.datrats.com.au/ > > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Rob P > Sent: Tuesday, December 02, 2003 4:10 PM > To: [EMAIL PROTECTED] > Subject: Re: 1600 handling question - understeer & bounce > > > > Sounds like you might benefit from a steering box brace - see Maddat or > Datsport. > A strut brace will make a noticeable difference to chassis rigidity if > that is the problem, mine did even on the street - see Cam Mckinnon. > Other things to consider are suspension settings. I think it's been said > that a harder rear setting gives a bit more oversteer?? anyone? If the front > is bouncing up and down perhaps the dampers are not working as well as they > should either. Don't quote me I'm just regurgitating stuff other people have > posted :-). Errol would know better. > > Rob P > > > > ----- Original Message ----- > From: Jeff Oldham > To: [EMAIL PROTECTED] > Sent: Tuesday, December 02, 2003 8:56 AM > Subject: 1600 handling question - understeer & bounce > > > Hi troops, > > > i have a handling question with my 1600 > i have understeer that i am trying to equalise > also the car feels a bit like the front bounces when it corners > and the grip seems to come & go....i can feel it in the steering wheel > > this is hard cornering at speed on a race track, not street driving. > > will a strutt brace help with these issues ? > > > thanks Jeff > > --membersozdat------------------------------------------------------- > OZDAT Mailing List Please Note:- > Send (un)subscribe requests to [EMAIL PROTECTED] > Send submissions to [EMAIL PROTECTED] > No unauthorised redistribution of this email > http://www.ozdat.com/ozdatonline/index.htm > http://www.ozdat.com/ozdatonline/listindex.html > http://www.mail-archive.com/[EMAIL PROTECTED]/ > --------------------------------------------------------------------- > > > --membersozdat------------------------------------------------------- > OZDAT Mailing List Please Note:- > Send (un)subscribe requests to [EMAIL PROTECTED] > Send submissions to [EMAIL PROTECTED] > No unauthorised redistribution of this email > http://www.ozdat.com/ozdatonline/index.htm > http://www.ozdat.com/ozdatonline/listindex.html > http://www.mail-archive.com/[EMAIL PROTECTED]/ > --------------------------------------------------------------------- > --membersozdat------------------------------------------------------- > OZDAT Mailing List Please Note:- > Send (un)subscribe requests to [EMAIL PROTECTED] > Send submissions to [EMAIL PROTECTED] > No unauthorised redistribution of this email > http://www.ozdat.com/ozdatonline/index.htm > http://www.ozdat.com/ozdatonline/listindex.html > http://www.mail-archive.com/[EMAIL PROTECTED]/ > --------------------------------------------------------------------- > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
