Pro10noob

iTrader: (13)

@FST4RD.....How big are your rear tires?
Are the sides rounded or not?
Is the car level or is the rear a bit higher then the front?
With what glue did you glued the tires?
Do you use traction fluids?
Tell us a bit more.

regards Roy

JamesHealey

iTrader: (1)

Yeah but to be fair they're also forcing you to use speed passion esc & motors, as well as only buying Tamiya or Hpi hop-ups.

The BRCA rules are much better imo.. Open Speedo, 21.5, Any chassis 180mm on rubber in modern class, and any 200mm chassis on foam in retro class.

Due to the popularity of the F109 in the UK the retro class has a much bigger attendance and it's also quicker than 180mm rubber.

I have the parts to run my car in either configuration so either is good for me.

mitchie

hey guys, i got one of these cars and i run foams,
theres understeer on entry to a corner
and heaps of oversteer during the exit,
theres not much f1 cars in my area so i have to race the 4 wheel drive turing cars and they drive so much more aggresive. any help with tuning would be great, ive heard alot about camber but im not sure how

FST4RD

I run 104 front rims and 103 rear rims
Front foams are approx 58mm and 54mm on the rear
Sides are rounded slightly
Car chassis sits perfectly flat
Don't use traction fluid at all

Someone suggested raising the front up?

FST4RD

Oh I also run 2 degrees camber on the front.
I rebuilt the rear diff, it's just tight enough that it doesn't slip, nice and smooth though.

Pro10noob

iTrader: (13)

Plus 1 for those rules.
It was also a issue at the european finales in the Tamiya cup.
You couldn't use the F103 any more but only the F104.
Strange is that they did allow the F104W
So the difference between 180 and 200MM cars was still there
Also you had to buy the batteries,tires and motor there.
Now that would cost you....
It was the main reason why i didn't go.
It is better to split the classes in 2.
Modern and retro F1 cars

regards Roy

Pro10noob

iTrader: (13)

@FST4RD...Loose the camber.
Try to get the front and rear tires the same diameter.
Set the car lower at the front then the rear.
When using the F103 tires at the rear, the car will become 200MM at the rear but still is 180 at the front.
This will cause a sharper steering car.
Try this(see pic) with the T-bar,it will help a lot.
Also do you run the steel ar carbon rear axle?

regards Roy

BadSign

iTrader: (15)

That would be my first step. Coat the rears fully, then adjust the fronts as needed. Start at the inner edge and work your way towards the center if you need more steering.

JamesHealey

iTrader: (1)

By running F104 at the front and F103 at the rear you've effectively made the cars rear track 160mm and the front 150mm.. this is going to give you the characteristics you talked about with over steer on exit.

The F104 is normally 145mm rear and 150mm front.
The F103 is normally 160mm rear and 170mm front.

Race cars are supposed to have a wider track at the front to help stability through corners, you might find a way to setup the F104 to run with F103 rears, but you're fighting a loosing battle I think.

It's not just a case of "more traction from bigger rears". you're fundamentally altering the weight transfer of the car from outer front tire in the corner exit, to outer rear which will make the car over steer on exit.

dfx

I'm afraid that is very hard to compete with 4x4. Tell us more about Your car setup, motor, ESC settings ect.


Same words as Pro10noob. Running outdoors with alu camber plate 1,5° the car have lost the rear at all. For the carpet I have proper steering with plastic camber plate position 2 and rear end is planted.
Higher rear end than front end works for me aswell. Using traction compound only for rears (F104 wheels).

JamesHealey

iTrader: (1)

selling my Exotek f104 check out for sale forum.

FST4RD

I still have the f104 rear wheels with the factory foams, will try them out.
I'll try your suggestions out... fingers crossed!

Also I was running 1 degree camber. But is it normal for the outside of the tyre to wear slightly more then the inside?

FST4RD

Never tried it before.
Whats the best one to use?

BadSign

iTrader: (15)

What everyone else is using at your track is usually best. I race only carpet and foam, so I use Paragon. But for rubber tires try Jack the Gripper or Trinity Death Grip and see what you like. DG works best on low traction, and JTG when you have a groove on the track. Avoid paragon on asphault, whether you run foam or rubber.

FST4RD

This would be ok... but no-one uses it...
We all run foams on outdoor asphault on a reasonably grippy track...