Gen 1 997 gt3 understeer

[911god]

So my car understeers and a wheel alignment ive had done has highlighted Cambers maxed on the adjustment any cures any kits?

[Arenki]

front spacers possibly...sure one of the technical people will correct me mind you

[spyderman8]

Just a thought: when you say "wheel alignment" did you mean "suspension geometry"? If not, that's what you really need.

[SonnyM]

Take a trip to CoG and all will be cured

[keep it lit]

do you still have the standard/original rear arb fitted?

[911god]

keep it lit said:

do you still have the standard/original rear arb fitted?

Suspendions all standard and yes it's wheel alignment with geo castor/camber that has unveiled the issues

[fioran0]

Exactly as ade mentioned. You need the revised (7.2 GT3) rear ARB.
Search for the parr fast road geo thread.
It's all in there on page 4 and 5

[911god]

fioran0 said:

Exactly as ade mentioned. You need the revised (7.2 GT3) rear ARB.
Search for the parr fast road geo thread.
It's all in there on page 4 and 5

Cheers struggling to find it thou

[boxsey]

911god said:

Cheers struggling to find it thou

Here you go:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[BubblesNW]

911god said:

Cheers struggling to find it thou

Try this

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[NBTBRV8]

fioran0 said:

Exactly as ade mentioned. You need the revised (7.2 GT3) rear ARB.
Search for the parr fast road geo thread.
It's all in there on page 4 and 5

I just read this thread and it is great, thanks!

[drmark]

And try softening your front ARB in the meantime possibly?

[911god]

Also just read this v interesting.
It's the rear sway bar from the 997 gt2 that the 997.2 gt3 got just to be clear?

[RatBoy M3CSL]

Yup, go full soft FARB, and swap the RARB... then learn to drive it on the closed diff... 'kart style'..

[fioran0]

The bars on the 997.1 GT3 come factory set at minimum under steer already. Without changing the rear bar to a thicker one there's no more range available to you to improve things with regards to understeer. You can however adjust them the opposite way and make it worse

Yeah, the 997 GT2 and the 7.2 GT3 bar is exactly the same.
The part superseded on both cars to a new number when the 7.2 was released

The 7.1 parts list now lists this same number rear bar as the 7.2GT3 and GT2 to be used any time a replacement is needed for that car too.

Edited by fioran0 on Friday 7th September 14:37

[MadMark911]

God - I get almost no understeer at all - but I note that my car sits lower and with a slighly more prenounced "down angle" (from rear to front), than most other GT3's.

Front ARB = full soft
Rear ARB = full hard

-2.5 Degrees neg on the front

Cup Tyres too!

[fioran0]

That's great you have a set up that's working for you

[911god]

MadMark911 said:

God - I get almost no understeer at all - but I note that my car sits lower and with a slighly more prenounced "down angle" (from rear to front), than most other GT3's.

Front ARB = full soft
Rear ARB = full hard

-2.5 Degrees neg on the front

Cup Tyres too!

So forgetting the cup tyres what's this cost you to have done with the setup?
I just spoke with a specialist that said no need to change arbs they do full geo set up on standard parts ( changing a few minor things) £650 plus vat that will take out all understeer and good for fast road/track use.

[MadMark911]

911god said:

So forgetting the cup tyres what's this cost you to have done with the setup?
I just spoke with a specialist that said no need to change arbs they do full geo set up on standard parts ( changing a few minor things) £650 plus vat that will take out all understeer and good for fast road/track use.

Nothing! The previous owner did this and I just had the OPC that I bought it from do a cursory check and print off the settings ~(so if it ever moved I could take it back)!

[911god]

MadMark911 said:

Nothing! The previous owner did this and I just had the OPC that I bought it from do a cursory check and print off the settings ~(so if it ever moved I could take it back)!

Result