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What tyre pressures do you run?
fullnoise - May 21st, 2004 at 03:14 PM

I'm talking beetle here.

From memory the factory placard says 19 front and 27 rear.

Some hillclimbers told me that you can change the pressures but always keep a 4psi difference front to rear.

Personally I set mine at 23 front and 28 rear.

CYA, CT

BiX - May 21st, 2004 at 03:20 PM

depends on the event

- track- 32 front, 38 rear
-motokhana- 30ish front, 48 rear.
hillclimb- 32 front, 36 rear.

but like a stiff tyre, hat feeling the walls flex.

Craig Torrens - May 21st, 2004 at 03:25 PM

19 front
27 rear

gayanne - May 21st, 2004 at 03:44 PM

Quote:
Originally posted by Craig Torrens
19 front
27 rear

68AutoBug - May 21st, 2004 at 04:25 PM

18 psi front 26 psi rear
early beetles..

20 psi F & 28 psi rear with Radials..

If You don't mind a choppy ride 22 F 30 Rear...
thats a bit extreme as My Lancer is 28F & 26 R..

Lee

fullnoise - May 21st, 2004 at 05:42 PM

At Oran Park on Saturday I started with 23 front and 28 rear

After 10 laps the tyres were 28 fornt and 33 rear.

I was stoked that I could get the same pressure increase out of all 4 tyres not just the rears. That means the fronts are working.

My pyro readings were
RF Inside 45C Middle 44C Outside 48C - more neg camber and 1-2 psi hot needed
RR Inside 56C Middle 56C Outside 60C - more neg camber or more roll stiffness
LR Inside 45 Middle 50 Outside 60 - direct result of camber on unloaded side of car
LF Inside 36 Middle 38 Inside 47 - must've written the figures the wrong way around or something is wrong.

Hope yall find that interesting. I'm still learning about what the readings mean.

Measurements are taken from 25mm inside the edge of the treadear on the inside and outside. The probe pokes about 5mm into the tyre tread.

CYA CT

[Edited on 21-5-2004 by fullnoise]

gayanne - May 21st, 2004 at 08:04 PM

Quote:
Originally posted by fullnoise
At Oran Park on Saturday I started with 23 front and 28 rear

After 10 laps the tyres were 28 fornt and 33 rear.

I was stoked that I could get the same pressure increase out of all 4 tyres not just the rears. That means the fronts are working.

My pyro readings were
RF Inside 45C Middle 44C Outside 48C - more neg camber and 1-2 psi hot needed
RR Inside 56C Middle 56C Outside 60C - more neg camber or more roll stiffness
LR Inside 45 Middle 50 Outside 60 - direct result of camber on unloaded side of car
LF Inside 36 Middle 38 Inside 47 - must've written the figures the wrong way around or something is wrong.

Hope yall find that interesting. I'm still learning about what the readings mean.

Measurements are taken from 25mm inside the edge of the treadear on the inside and outside. The probe pokes about 5mm into the tyre tread.

CYA CT

[Edited on 21-5-2004 by fullnoise]


[Edited on 21-5-2004 by gayanne]

buggied - May 23rd, 2004 at 05:00 AM

5 psi front and 5 psi rear (thats on a frame buggy with alloy V8 15" stockies front and sprint car tyres rear)

amazer - May 24th, 2004 at 01:27 AM

24 front 28 rear.
The scientific method I used in coming up with these figures is:
Jeff told me that would be a good place to start. About 5 years ago and I have never bothered to experiment.

fullnoise - May 24th, 2004 at 09:15 AM

Hi JVL,

No I haven't tried the same pressures on all 4 corners. There is so little weight in the front of a beetle that I'd assume that the tyres would just show signs of over inflation. I might try that next round just to make sure.

One of the Porsche tuners told me to aim for 30 hot. I found that worked for Paul and Jak but I needed 32. I'm only talking rears here.

I think my fronts are still a little high. Perhaps 21 or 22 cold would be better.

CYA CT :alien