[Fot] Hoosier radial slicks

[tr4racing at googlemail.com]

Dear Ken,

 

When I got the tires made little changes like camber, ride height, sway bar settings.

 

For sure the high pressure on the tires make them feel nice to ride….but the laptime says -> SLOW.

 

Interestingly the low tire pressure felt even better, and the tops speed chart is also interesting:

32psi – 194kph

30psi – 208kph

34psi – 197kph

27psi – 216kph – 5th fastest  car in that race.

 

Means, low pressure is the way to go.

But I’ll get a softer compound for the back end. The tire man said, the rear tires don’t reach the necessary temperature.

 

 

Cheers

Chris

 

 

From: Ken Knight <kknight at klaenv.com> 
Sent: Sunday, July 9, 2023 7:58 PM
To: Christian Marx <tr4racing at googlemail.com>; fot at autox. team. net <fot at autox.team.net>
Subject: RE: [Fot] Hoosier radial slicks

 

It is a setup and may require changes in spring rates, sway bar settings, camber and toe to get the most out of the tire.  The way the car is driven on the new tires; braking points, turn in, power out can also be a learning curve.  The “feel” of these tires is going to be different than the old tire and possible as you get to the edge more subtle before losing all grip.  Just takes a bit of track time and you will no doubt get it.  Ken

 

Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>  for Windows

 

From: Christian Marx via Fot <mailto:fot at autox.team.net> 
Sent: Sunday, July 9, 2023 8:11 AM
To: fot at autox. team. net <mailto:fot at autox.team.net> 
Subject: Re: [Fot] Hoosier radial slicks

 

I first tried high pressure. 

Again 5 secon slower in total 10 seconds. 

 

Then I tried low pressure....faster then my other tries. 

Only 3 seconds slower than the Avon Times. 

 

Cheers 

Chris 

 

Brian Dolan <bdolan1776 at gmail.com <mailto:bdolan1776 at gmail.com> > schrieb am So., 9. Juli 2023, 12:08:

27 is my bet. 

 

The radials will be a few seconds slower than slicks because less grip

 

On Sun, Jul 9, 2023 at 12:08 AM Christian Marx via Fot <fot at autox.team.net <mailto:fot at autox.team.net> > wrote:

Thanks guys, 

 

Wit AVON I started with 14psi cold and got up to 22psi hot. Biasply slicks. 

 

The Hoosiers are radials.

I'm currently 5 seconds slower using 32psi hot and was 6 seconds slower with 30 psi hot.

 

Not sure which direction to go?

34psi or 27psi hot?

 

Cheers Chris 

 

Christian Marx <tr4racing at googlemail.com <mailto:tr4racing at googlemail.com> > schrieb am Sa., 8. Juli 2023, 21:34:

Hi guys, 

 

Anyone has some input about the target pressure on these slicks? 

 

Cheers 

Chris 

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