In those days, I am not even sure if you could adjust bump & rebound on
the s.absorbers. At least they would have to be taken apart. Eventually,
Konis came along with an adjustable damper, but there was only one
adjustment screw, which either stiffened or softened *both* parametres.
It is only "recently" that we are able to adjust them separately.
> Daniel Fris
Ref. the setups, I expect the following to be included:
-Anti-Roll bars front & rear
-diff settings on the lotus (you could not change ratios, the whole box
had to be swapped), ratios on the other cars.
-Tyre pressures
-Toe/camber ...castor?
-Springs, possibly shocks (swapping?)
-Ride height
-LSD adjustment
Any other ideas?
Best,
Matt
--
Matthew Knutsen
Cheek Racing Cars
http://www.racesimcentral.net/~kareknut/
Just a few questions. LSD is not the acid is it? Limited Slip Diff maybe?
If it is then what's the diff (sorry!) between it and diff settings above?
Could the ride height be adjusted? And if so would it make much
difference? It's not as if there were any groud effects.
Alan
> > Ref. the setups, I expect the following to be included:
> > -Anti-Roll bars front & rear
> > -diff settings on the lotus (you could not change ratios, the whole
> box
> > had to be swapped), ratios on the other cars.
> > -Tyre pressures
> > -Toe/camber ...castor?
> > -Springs, possibly shocks (swapping?)
> > -Ride height
> > -LSD adjustment
> Just a few questions. LSD is not the acid is it? Limited Slip Diff
> maybe?
> If it is then what's the diff (sorry!) between it and diff settings
> above?
Yes, the ride height could be adjusted. Ride height adjustment has
*very* much effect, it is one of the most common adjustments made in
Formula Fords (no wings). If you rake the car (lower the front), you
will have more front weight bias, making the car turn in faster, and
vice versa.It is not a case of bringing the car closer to the ground,
but to adjust front/rear weight bias.
On an aerodynamically advanced car, one tends to be a bit more careful,
as the resulting discrepancies in Angle Of Attack upsets the aerodynamic
setup.
Cheers,
Matt
(not a native speaker)
--
Matthew Knutsen
Cheek Racing Cars
http://home.sol.no/~kareknut/
Matt you write (I was going to say speak) very well for a non-native
speaker, at least your teaching me new meanings of words (rake, and there
was a Abercombie angle? the other day). I of course meant ground effects
not groud effects.
I understand the principles behind adjusting the front to rear weight bias
but how exactly do you lower a car with that type of suspension setup?
It's not just shorter springs is it? And what does it mean to
loosen/tighten a differential?
(Maybe it would be easier to refer me to a good book?)
Many thanks
Alan
(at home)
: Whoops- yup, put some speed into the driver:))
Only if your name is Kowalski!
Martin
Nigel Mansell RIP!
Don
> >bias<BR>
> >but how exactly do you lower a car with that type of suspension
> setup?<BR>
> >It's not just shorter springs is it? And what does it mean to<BR>
> >loosen/tighten a differential?<BR>
> >(Maybe it would be easier to refer me to a good book?)<BR>
> ><BR>
> >Many thanks<BR>
> >Alan <BR>
> >(at home)<BR>
> ><BR>
> ></HTML>
> Alan...if I may barge in here...try Carroll Smith's excellent series
> of books;
> "Tune to Win", "Prepare to Win", and "Engineer to Win", available from
> Classic
> Motorbooks 800-826-6600. Call just to get their catalogue, it's
> amazing.
> Don
Matt
--
Matthew Knutsen
Cheek Racing Cars
http://home.sol.no/~kareknut/
> > > Could the ride height be adjusted? And if so would it make much
> > > difference? It's not as if there were any groud effects.
> > > Alan
> > Yes, the ride height could be adjusted. Ride height adjustment has
> > *very* much effect, it is one of the most common adjustments made in
> > Formula Fords (no wings). If you rake the car (lower the front), you
> > will have more front weight bias, making the car turn in faster, and
> > vice versa.It is not a case of bringing the car closer to the
> ground,
> > but to adjust front/rear weight bias.
> > On an aerodynamically advanced car, one tends to be a bit more
> careful,
> > as the resulting discrepancies in Angle Of Attack upsets the
> aerodynamic
> > setup.
> > Cheers,
> > Matt
> > (not a native speaker)
> > --
> > Matthew Knutsen
> > Cheek Racing Cars
> > http://home.sol.no/~kareknut/
> Matt you write (I was going to say speak) very well for a non-native
> speaker, at least your teaching me new meanings of words (rake, and
> there
> was a Abercombie angle? the other day). I of course meant ground
> effects
> not groud effects.
> I understand the principles behind adjusting the front to rear weight
> bias
> but how exactly do you lower a car with that type of suspension setup?
> It's not just shorter springs is it? And what does it mean to
> loosen/tighten a differential?
> (Maybe it would be easier to refer me to a good book?)
> Many thanks
> Alan
> (at home)
Loosening/tightening the diff decides how "easily" it will lock, or when
it will ease off on the inside wheel. Kinda difficult to feel, but would
it help in the current GPL setup if the diff was loosened up a ton or
so??:))
Ref - books, see next post by Don!
Cheers,
Matt
--
Matthew Knutsen
Cheek Racing Cars
http://home.sol.no/~kareknut/
Matt:
I think you can change ride height just by changing the threaded
springstops up or down a little, and use the same springs.
MM
> > > > Could the ride height be adjusted? And if so would it make much
> > > > difference? It's not as if there were any groud effects.
> > > > Alan
> > > Yes, the ride height could be adjusted. Ride height adjustment has
> > > *very* much effect, it is one of the most common adjustments made in
> > > Formula Fords (no wings). If you rake the car (lower the front), you
> > > will have more front weight bias, making the car turn in faster, and
> > > vice versa.It is not a case of bringing the car closer to the
> > ground,
> > > but to adjust front/rear weight bias.
> > > On an aerodynamically advanced car, one tends to be a bit more
> > careful,
> > > as the resulting discrepancies in Angle Of Attack upsets the
> > aerodynamic
> > > setup.
> > > Cheers,
> > > Matt
> > > (not a native speaker)
> > > --
> > > Matthew Knutsen
> > > Cheek Racing Cars
> > > http://home.sol.no/~kareknut/
> > Matt you write (I was going to say speak) very well for a non-native
> > speaker, at least your teaching me new meanings of words (rake, and
> > there
> > was a Abercombie angle? the other day). I of course meant ground
> > effects
> > not groud effects.
> Thanks, and that Angle was the Ackermann??:-)
> > I understand the principles behind adjusting the front to rear weight
> > bias
> > but how exactly do you lower a car with that type of suspension setup?
> > It's not just shorter springs is it? And what does it mean to
> > loosen/tighten a differential?
> > (Maybe it would be easier to refer me to a good book?)
> > Many thanks
> > Alan
> > (at home)
> With ref to ride height adjustment, that's exactly how you do it- by
> compressing or fitting a shorter spring. The springs are fitted over the
> shock absorber, and there are discs on threads at the bottom that can be
> tightened or loosened.
> This all affects other wheel angles, of course.
> Come to think of it, Papy probably should include corner weight settings
> too:)
> Loosening/tightening the diff decides how "easily" it will lock, or when
> it will ease off on the inside wheel. Kinda difficult to feel, but would
> it help in the current GPL setup if the diff was loosened up a ton or
> so??:))
> Ref - books, see next post by Don!
> Cheers,
> Matt
> --
> Matthew Knutsen
> Cheek Racing Cars
> http://home.sol.no/~kareknut/
> > Alan...if I may barge in here...try Carroll Smith's excellent series
> > of books;
> > "Tune to Win", "Prepare to Win", and "Engineer to Win", available from
> > Classic
> > Motorbooks 800-826-6600. Call just to get their catalogue, it's
> > amazing.
> > Don
> Don,they are the best, it's as simple as that. Exactly what I was going
> to suggest:))
> And a whole lot of laughs in there too!
> Matt
> --
> Matthew Knutsen
> Cheek Racing Cars
> http://home.sol.no/~kareknut/
thanks again
Alan
Not quite right - Lowering the front end (as an example) doesn't alter
the weight bias, it alters the roll centre which then changes the
handling of the car.