G21 B3 tyre pressures

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Hawmaws
Posts: 17
Joined: Mon Mar 16, 2020 9:02 pm
Location: Berkshire

G21 B3 tyre pressures

Post by Hawmaws » Mon Nov 22, 2021 7:15 pm

To add some excitement over the weekend I decided to adjust the tyre pressures down to the recommended 250 km/h 😀 values.

So an adjustment from 2.9 to 2.3/4 bar.

What a difference. The car feels a lot more planted and keyed into the road. The highest praise I can give is it feels almost as good as my old e39 sport.

Ride quality is also much more resolved.

I’d definitely recommend.
G21 B3 #200
Alpina D5 #121(deceased)
987 Boxster Black #115

Jonnywishbone
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ALP
Posts: 196
Joined: Thu Aug 14, 2014 8:45 pm
Location: London

Re: G21 B3 tyre pressures

Post by Jonnywishbone » Mon Nov 22, 2021 7:47 pm

I can't say I know what the ride is like on the higher pressures as the recommended 49 PSI always seemed like ridiculous overkill when never going near even 180 kph let alone mph, especially on the 20" rims. I have mine at 40 PSI which works for me though might experiment with going lower.
Sal

2021 G21 B3 #115

Grumpyjohn1957
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Posts: 105
Joined: Fri Nov 27, 2020 10:53 pm

Re: G21 B3 tyre pressures

Post by Grumpyjohn1957 » Thu Nov 25, 2021 12:31 am

Hawmaws wrote:
Mon Nov 22, 2021 7:15 pm
To add some excitement over the weekend I decided to adjust the tyre pressures down to the recommended 250 km/h 😀 values.
So an adjustment from 2.9 to 2.3/4 bar.
What a difference. The car feels a lot more planted and keyed into the road. The highest praise I can give is it feels almost as good as my old e39 sport.
Interesting.
I ran Brunhild at the high speed setting of 3.6 bar (3.4 cold) front & back with new rears over the summer.
After 13000 on the rears they're now showing signs of running over inflated. 3mm left across 70% of the middle, the outer edges have about 5mm.
When she went into Sytners for surgery in August they set the pressures to 3.2 all round.
Guess it made a fractional ride difference till the weather turned colder.
Now on a morning start the TPMS shows 2.8 rising to 3.0/3.1 when running but I now find I'm 2 mpg down!
Handling under hard acceleration is not so good, she wiggles and shimmies at the back on dry road and breaks grip on damp.
Getting a bit of torque steer too, she's also taken to tramlining. Cornering remains pretty normal.
Fronts unaffected wear wise.
Generally much happier using higher settings for my driving style, more feedback, and defo more stable.
Having Sottozeros fitted this Saturday which might prove entertaining.
Old fronts to the hotel, rears to the skip.
John

2019 G31 B5 Biturbo Touring #336 - Sophisto Grey

(aka Brunhild)

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