Racing soft tires

[Duvorynn]

Hi to all!

Today I've raced with VW 1200 '66 and notice that the car isn't turning with RS tires like it did. Tried SS tires and they were pretty similar like RS so wtf...I've changed setups and change different settings but still car wouldn't turn like it did before.
I've inspected a lot of stuff a notice that ALL racing tires on VW 1200 abd VW Type-2 have grooves...how can that be?
Changed vehicles from different manufacturers and those DON'T have grooves on racing tyres but do on sport and comfort which is how it should be.

I'm clueless.

Thanks for any info.
Davorin

 

[Theufcveteran]

Hi to all!

Today I've raced with VW 1200 '66 and notice that the car isn't turning with RS tires like it did. Tried SS tires and they were pretty similar like RS so wtf...I've changed setups and change different settings but still car wouldn't turn like it did before.
I've inspected a lot of stuff a notice that ALL racing tires on VW 1200 abd VW Type-2 have grooves...how can that be?
Changed vehicles from different manufacturers and those DON'T have grooves on racing tyres but do on sport and comfort which is how it should be.

I'm clueless.

Thanks for any info.
Davorin

Old cars have grooved racing tyres if the Honda RA272 is anything to go by. Are you sure the front tyres aren’t rubbing against the wheel well on racing softs when turning? That can limit rotation.

 

[SoulSilvera]

Hi to all!

Today I've raced with VW 1200 '66 and notice that the car isn't turning with RS tires like it did. Tried SS tires and they were pretty similar like RS so wtf...I've changed setups and change different settings but still car wouldn't turn like it did before.
I've inspected a lot of stuff a notice that ALL racing tires on VW 1200 abd VW Type-2 have grooves...how can that be?
Changed vehicles from different manufacturers and those DON'T have grooves on racing tyres but do on sport and comfort which is how it should be.

I'm clueless.

Thanks for any info.
Davorin

Racing tires don't necessarily have to be slicks to be racing tires.

Either way, the appearance of the tires doesn't matter to your problem. Haven't touched that VW in a while, but I remember it being a pain, especially with the engine swap. Increase the natural frequency (above 3.00 Hz for Racing tires) and increase the values for the roll bars as well. If the problem persists, raise the ride height. Usually 20mm above the lowest possible value is the bare minimum.

 

[lbpomg95]

Hi to all!

Today I've raced with VW 1200 '66 and notice that the car isn't turning with RS tires like it did. Tried SS tires and they were pretty similar like RS so wtf...I've changed setups and change different settings but still car wouldn't turn like it did before.
I've inspected a lot of stuff a notice that ALL racing tires on VW 1200 abd VW Type-2 have grooves...how can that be?
Changed vehicles from different manufacturers and those DON'T have grooves on racing tyres but do on sport and comfort which is how it should be.

I'm clueless.

Thanks for any info.
Davorin

As above, it's most likely arch-rubbing. Increase body height, and natural frequency until the problem stops.

 

[Duvorynn]

Racing tires don't necessarily have to be slicks to be racing tires.

Either way, the appearance of the tires doesn't matter to your problem. Haven't touched that VW in a while, but I remember it being a pain, especially with the engine swap. Increase the natural frequency (above 3.00 Hz for Racing tires) and increase the values for the roll bars as well. If the problem persists, raise the ride height. Usually 20mm above the lowest possible value is the bare minimum.

I have tried all of that but the car just don't handle corners like it did...didn't swap engine so it's 124hp. It should and did corner better

Old cars have grooved racing tyres if the Honda RA272 is anything to go by. Are you sure the front tyres aren’t rubbing against the wheel well on racing softs when turning? That can limit rotation.

Switched to Unimog and RS on it ARE slicks and the car is as old as ut could be 😂