shocks only affect the transition to the steady state (which of course is
important). once it is ready they dont affect the amount of roll.
id say the stock bar in virtually EVERY street-production car is going be
insufficient for the amount roll induced on R tires. people do other things
sometimes to "trick" a stock suspension into sort of working under the rules
of their class. personally id try a bigger bar and drive around any push
with your throttle and by aggressive trail braking. the car will seem to
handle worse (i.e. push more) but you will have more traction if you can get
rid of the push with technique. that takes some practice but i think the
little bimmers are very easy to drive that way. id be happy to show you how
=)
if that doesnt work, just drive closer to the cones and get on the gas
earlier :)
YMMV,
james
----- Original Message -----
From: "Matthew Rehrer" <mrehrer@rehrer.com>
To: "James Creasy" <james@thevenom.net>
Cc: <ba-autox@autox.team.net>
Sent: Sunday, April 20, 2003 12:35 PM
Subject: Re: marina, was Re: What a great course! And still another day off!
> Hey James et. al.-
>
> Since in stock one can only add/change the front sway bar would
> it be worth while for me to look into this to try to prevent this kind of
> roll:
>
> http://www.rehrer.com/racing/bodyRoll.Marina.00.jpg
>
> What are the potential negatives to more front bar? I am still running
> stock shocks as well but I do not imagine the shocks have much impact
> on body roll, or do they?
>
> Thanks for your thoughts,
>
> Matthew
>
> On Sunday, April 20, 2003, at 10:52 AM, James Creasy wrote:
>
> > in general the sticker the surface/tires the more a car will understeer.
> >
> > the most basic way to control the steady state steer characteristic
> > (under/over steer) is with sway bar tuning.
> >
> > however, the sticker a surface also the more roll you will get,
> > requiring
> > more overall bar roll resistance. for example, at my target G force of
> > 1.4, i require 321lb/in of total sway bar roll resistance to limit body
> > roll
> > to 2 degrees. at 1.6 G's it becomes 480lb/in, a big increase!
> >
> > so you may need i to increase the FRONT roll bar to decrease push
> > because
> > the front tires are getting into positive camber. i remember i did a
> > larger
> > front bar on my rx7 and it reduced the push.
> >
> > -james
> >
> >
> >
> > ----- Original Message -----
> > From: "Paul S (#51 STS)" <ibisbike@yahoo.com>
> > To: <ba-autox@autox.team.net>
> > Sent: Sunday, April 20, 2003 10:33 AM
> > Subject: Re: marina, was Re: What a great course! And still another day
> > off!
> >
> >
> >> I agree the course was great, and the drive home was
> >> very pleasant compared to the normal stuck in traffic
> >> forever deal we get on Sunday's.
> >>
> >> Now I just need to figure out why my car displayed
> >> more understeer than I have ever encountered with it
> >> before. This was with the rear sway bar adjusted full
> >> stiff. Normally I can get some lift throttle
> >> oversteer in the little Si, but I got nothing...just
> >> more plowing. It was incredibly frustrating, and
> >> painfully slow.
> >>
> >> Any suggestions before I completely embarass myself at
> >> the Tour in two weeks on more grippy concrete?
> >>
> >> Thanks for a great event (even if my car sucked).
> >>
> >> Paul
> >>
> >>
> >>
> >> =====
> >> 2000 Civic Si
> >> #51 STS
> >>
> >> __________________________________________________
> >> The New Yahoo! Search - Faster. Easier. Bingo
> >> http://search.yahoo.com
|
