Gibbo

Hi there

I could swear I've read the C4S on the 997 cars have a thicker rear bar compared to the C2S, I was wondering if anyone knows if this true?

If true will the C4S bar fit a C2S?

Edgy01

There's a bar in these cars??


Seriously, do you really want to mess with the factory setup. Remember, they actually designed your car and did all the engineering...

Gibbo

Yeah they designed understeer into the car.

A thicker rear bar shall help dial that out, basic chassis dynamics.

mdrums

Gibbo, what you need is adjustable front a rear sway bars..like on the GT3 and GT3RS. However sways will not remove the understeer by themselves....it takes more than that and you will need to add GT3 lower control arms to get more negative camber up front.

Gibbo

Hi m8

I've got gen2 GT3 front and rear arbs. But the rear even on softest is too stiff, creating too much over steer. So now I'm back on C2S rear bar and front bar set to softest, it's quite nice actually, far less understeer than before as I do have GT3 lower arms too and a full GEO setup.

I just need a slightly stiffer Porsche rear bar, hence my question is the C4S bar thicker than C2S, if anyone knows?

Mike in CA

Here is the info for the 2009 997.2 models. I'd bet it's the same for the 997.1 but can't say for sure. I don't know if the bars are interchangeable so I can only answer part of your question, but in general rear C4 bars are stiffer than rear C2 bars.

FRONT Anti-roll bars

911 Carrera
• Basic chassis Tube 24,0 x 3,8 mm
• PASM chassis – Coupe Tube 24,0 x 3,8 mm
• PASM chassis – Cabriolet Tube 24,5 x 3,8 mm
• PASM sports chassis – Coupe only Tube 24,5 x 3,8 mm

911 Carrera S
• PASM chassis Tube 24,5 x 3,8 mm
• PASM sports chassis – Coupe only Tube 24,5 x 3,8 mm

911 Carrera 4
• Basic chassis – Coupe, Cabriolet Tube 22,5 x 3,5 mm
• PASM chassis – Coupe, Cabriolet Tube 23.6 x 3.5 mm
• PASM sports chassis – Coupe only Tube 23,6 x 3,5 mm

911 Carrera 4S
• PASM chassis Tube 23.6 x 3.5 mm
• PASM sports chassis Tube 23,6 x 3,5 mm



REAR Anti-roll bars

911 Carrera
• Basic chassis Tube 18.5 x 2.5 mm
• PASM chassis Tube 18.5 x 2.5 mm
• PASM sports chassis Tube 18,5 x 2,5 mm

911 Carrera S
• PASM chassis Tube 19.6 x 2.6 mm
• PASM sports chassis Tube 18,5 x 2,5 mm

911 Carrera 4
• Basic chassis Tube 20.7 x 2.8 mm
• PASM chassis Tube 21.7 x 3.0 mm
• PASM sports chassis Tube 20,7 x 2,8 mm

911 Carrera 4S
• PASM chassis Tube 21.7 x 3.0 mm
• PASM sports chassis Tube 20,7 x 2,8 mm

mdrums

Mike in CA, do,you have the sway bar info for 2011-2012 GTS?

Mike in CA

Sorry, no.

Gibbo

Do have any of the info for the GT3's?

Mike in CA

I said no earlier, but thinking about it, I'd guess the GTS and PASM sport chassis cars would have identical suspension specs.

The source of my info is the 2009 Technik Introduction for the Carrera models. Nothing on the GT3.....

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alexb76

Great info, the only 997.1 difference is that they did not come with PASM Sport, so the different sways for those were not included.