Toe-OUT should promote turn-in grip, because the inside tire is helping
instead of fighting the outside tire (Ackerman to the contrary
notwithstanding).
--Steve Smith (author of the justly famed "Four-Wheel Drift")
Kurt
Currently on a rotation of Four-Wheel Drift, an F1 50th Anniversary
mag that came out in 2000, and Bill James Win Shares. Need new toilet
fodder and I don't feel like shelling out $20 for ICR2 just to get
another copy of that book. =)
Jason
With toe-out, consider a small steering angle which brings the
outside wheel straight and hence turns the inside wheel in.
At this point, there's a drag force generated by the inside
wheel, which helps to yaw the kart into the corner.
This is why toe-out gives sharper turn-in (slight instability)
and toe-in promotes stability.
This is a tyre thing. Without going into the detail, the useful
bit is that two tyres sharing the weight equally produce *more*
grip than the same two tyres, with the same total weight but
divided unevenly. Hence, you want to reduce the lateral load
transfer as much as possible. This is also the basis for tuning
handling on springs and anti-roll bars, on "real" cars.
HTH,
Jonny
http://www.racesimcentral.net/
I am just getting up to speed on Karting since I recently bought one for my
son. but I will reply to what I know so far.
> > Guys,
> > I've had a real trawl about, but can't find anything useful on kart
> > handling.
> > Basically, I can adjust the width of the front and rear track, and I can
> > adjust the front toe angle. When the front wheels turn, the inside wheel
> > lifts, however when driving, this causes the inside rear wheel to lift.
I am setting it at zero right now without in the Kart. It gives a touch of
toe out with him in it. Remeber there will be a difference in settings
between less driver and with driver.
width: I _think_ that a narrower track puts more weight on the
I have not messed with the front or rear track just yet. Mostly due to my
son not having any problems with understeer or oversteer in any of the
corners. He may in a while since he is running about a second off race pace
for his class
Not sure on anything tire wise. I bought a new set of red Maxxis and well
after 120 laps with him running reasonably hard they are not wearing much at
all. They come in nice and hot after 10 laps of running, but wear has not
become an issue. I guess it will when he gets used to really running the
corners hard.
Hope this helps.
Dave
When you turn to the left, the left front tire should push the left front of
the chassis upwards. On some karts you can adjust this by changing the
caster angle. You want this to happen because you want the kart to lift and
transfer the weight from the left rear to the right front for a left turn.
If you can get to the point where the inside rear wheel just leaves the
ground, so much the better. Since the rear axle is solid, you will scrub off
speed in a corner if both tires are touching the ground.
A little toe-out can help turn in. This depends on the steering geometry of
the kart. Some karts have parallel steering and some have Ackerman built in.
Widening the rear track will typically reduce rear grip. Widening the front
track will typically increase front grip. The reason for this is that the
wider the front track, the more the inside tire will lift the chassis in a
turn (see comments above). Offset tracks are not uncommon on ovals or road
courses that have many more turns in one direction than the other.
What type of tires are you using? I haven't raced for about 5 years but we
used to use Bridgestone YEE and YEF's (I think that's what they were) or
Dunlop R6's. Typical air pressure was between 14 psig and 22 psig. Higher
pressures heated up faster on cold days and short races. Lower pressures for
longer races.
Wayne Hutchison
No, no, no--the strat guide I wrote for ICR2/CART Racing was called
"Winning!" (after the P.L. Newman Indy racing movie of the same name).
"Four-Wheel Drift" shipped with GPL. If you can't get enuf of my deathless
prose, there's always "PC Pilot," a paen to flight sims that sold all of
abt. 870 copies.
--Steve
> >--Steve Smith (author of the justly famed "Four-Wheel Drift")
> I'm running out of toilet reading here.
> Currently on a rotation of Four-Wheel Drift, an F1 50th Anniversary
> mag that came out in 2000, and Bill James Win Shares. Need new toilet
> fodder and I don't feel like shelling out $20 for ICR2 just to get
> another copy of that book. =)
> Jason
> http://www.racesimcentral.net/
> I am just getting up to speed on Karting since I recently bought one for
my
> son. but I will reply to what I know so far.
> > What kind of kart chassis do you have, some are stiffer than others.
wrote
> in
> > > x-no-archive: yes
> > > Guys,
> > > I've had a real trawl about, but can't find anything useful on kart
> > > handling.
> > > Basically, I can adjust the width of the front and rear track, and I
can
> > > adjust the front toe angle. When the front wheels turn, the inside
wheel
> > > lifts, however when driving, this causes the inside rear wheel to
lift.
> I think you are seeing the outside front lifting when standing still.
When
> you are driving it lifts the inside wheel to help the Kart turn in. With
no
> diff this helps the kart turn in. It is called jacking for a jacking
> effect. The wider the front track the larger the jacking effect is.
> > > Toe angle: Why would I want anything other than parallel? Straight
line
> > > stability is not an issue.
> I am setting it at zero right now without in the Kart. It gives a touch
of
> toe out with him in it. Remeber there will be a difference in settings
> between less driver and with driver.
> width: I _think_ that a narrower track puts more weight on the
> > outside
> > > wheel, whereas a wider track shares the weight more evenly. So, would
a
> > > narrower track give more grip, but less predictability? i.e. breaking
> > loose
> > > suddenly and more ***ly.
> I have not messed with the front or rear track just yet. Mostly due to my
> son not having any problems with understeer or oversteer in any of the
> corners. He may in a while since he is running about a second off race
pace
> for his class
> > > I had enough trouble with tyres. I still don't know if people really
> > thought
> > > that a harder tyre heats up more, of if there's a misinformation
> campaign
> > > going on. This stuff makes my brain hurt, 'cause it's a bit more
> > > complicated.
> > > Any help appreciated.
> > > R.
> Not sure on anything tire wise. I bought a new set of red Maxxis and well
> after 120 laps with him running reasonably hard they are not wearing much
at
> all. They come in nice and hot after 10 laps of running, but wear has not
> become an issue. I guess it will when he gets used to really running the
> corners hard.
> Hope this helps.
> Dave
Seriously, you're a great writer. I almost wish GPL had sold enough
copies that you could do a follow up novel-sized book with all of
things we've learned since it came out. I'll stop patronizing you
now, hehe.
Jason
On Fri, 12 Jul 2002 00:29:43 GMT, "Steve Smith"
>No, no, no--the strat guide I wrote for ICR2/CART Racing was called
>"Winning!" (after the P.L. Newman Indy racing movie of the same name).
>"Four-Wheel Drift" shipped with GPL. If you can't get enuf of my deathless
>prose, there's always "PC Pilot," a paen to flight sims that sold all of
>abt. 870 copies.
>--Steve
>> On Thu, 11 Jul 2002 10:50:43 GMT, "Steve Smith"
>> >--Steve Smith (author of the justly famed "Four-Wheel Drift")
>> I'm running out of toilet reading here.
>> Currently on a rotation of Four-Wheel Drift, an F1 50th Anniversary
>> mag that came out in 2000, and Bill James Win Shares. Need new toilet
>> fodder and I don't feel like shelling out $20 for ICR2 just to get
>> another copy of that book. =)
>> Jason
> Seriously, you're a great writer. I almost wish GPL had sold enough
> copies that you could do a follow up novel-sized book with all of
> things we've learned since it came out. I'll stop patronizing you
> now, hehe.
> Jason
> On Fri, 12 Jul 2002 00:29:43 GMT, "Steve Smith"
> >Jason,
> >No, no, no--the strat guide I wrote for ICR2/CART Racing was called
> >"Winning!" (after the P.L. Newman Indy racing movie of the same name).
> >"Four-Wheel Drift" shipped with GPL. If you can't get enuf of my
deathless
> >prose, there's always "PC Pilot," a paen to flight sims that sold all of
> >abt. 870 copies.
> >--Steve
> >> On Thu, 11 Jul 2002 10:50:43 GMT, "Steve Smith"
> >> >--Steve Smith (author of the justly famed "Four-Wheel Drift")
> >> I'm running out of toilet reading here.
> >> Currently on a rotation of Four-Wheel Drift, an F1 50th Anniversary
> >> mag that came out in 2000, and Bill James Win Shares. Need new toilet
> >> fodder and I don't feel like shelling out $20 for ICR2 just to get
> >> another copy of that book. =)
> >> Jason
Eldred
--
Homepage - http://www.umich.edu/~epickett
My .sig file is in the shop for repairs...
Remove SPAM-OFF to reply.
I don't remember getting it with the original ICR2. It was only with
Cart Racing no?
I remember all the places where it was obvious Steve had written
"Indy" and then used a search/replace function to substitute "Cart".
Like the Cart 500 and Cart car racing 2.
Jason
No, I think the book only came with CART Racing (the one w. Rendition
support!).
--Steve
> >No, no, no--the strat guide I wrote for ICR2/CART Racing was called
> >"Winning!"
> You had a book included with ICR2? Damn, I gotta find that manual...
> Eldred
> --
> Homepage - http://www.umich.edu/~epickett
> My .sig file is in the shop for repairs...
> Remove SPAM-OFF to reply.
> >You had a book included with ICR2? Damn, I gotta find that manual...
> I don't remember getting it with the original ICR2. It was only with
> Cart Racing no?
> I remember all the places where it was obvious Steve had written
> "Indy" and then used a search/replace function to substitute "Cart".
> Like the Cart 500 and Cart car racing 2.
> Jason
