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stuarts
Newbie


Joined: 15 Sep 2017
Posts: 19



PostPosted: Wed Sep 27, 2017 3:25 pm    Post subject: 997 - first impressions Reply with quote

So,
I picked up the 997 as mentioned here: http://911uk.com/viewtopic.php?t=123126&sid=8a2f5fe9292ec3f0a1f1253ba6f82d98

First impressions, wow, what a great car!
I thought with the Shrick cams, GT3 throttle body and remap it might be a bit woolly, but it pulls ok. I sat in crawling traffic for half an hour going through the Blackwall Tunnel and it was just fine.

Short shift isn't a problem, only for the first couple of shifts of a morning, just take it slow and ease into the slot and it's fine.

Brakes - spot-on, nothing to say.

Only thing I've noticed is, hitting the throttle hard, the car slightly torque steers (or feels like that) and pulls to the left. Sudden lift-off and it dips slightly to the right.
Not sure if this is down to worn dampers, suspension arm wear, engine mounts or just the LSD?

Any thoughts out there?
Cheers!
 
  
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FZP
Suzuka


Joined: 18 Jan 2015
Posts: 1054
Location: Cheshire


PostPosted: Wed Sep 27, 2017 4:22 pm    Post subject: Reply with quote

Any handling issues I'd recommend seeing a specialist like Centre Gravity. You'll get a magnificent car back i can assure you. I had a misbehaving car until I saw him. 10/10
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Phil 997
Shanghai
Shanghai


Joined: 05 Dec 2015
Posts: 10048
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Wed Sep 27, 2017 5:03 pm    Post subject: Reply with quote

Agreed these cars handle much better with a full geo. Thumb great to hear your happy with it, looks like a lovely car. Grin
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911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.
 
  
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Desert Dragon
Spa-Francorchamps


Joined: 03 May 2017
Posts: 351



PostPosted: Wed Sep 27, 2017 5:47 pm    Post subject: Reply with quote

FZP wrote:
Any handling issues I'd recommend seeing a specialist like Centre Gravity. You'll get a magnificent car back i can assure you. I had a misbehaving car until I saw him. 10/10
+1 Chris is very good.
 
  
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stuarts
Newbie


Joined: 15 Sep 2017
Posts: 19



PostPosted: Wed Sep 27, 2017 6:09 pm    Post subject: Reply with quote

The car was actually set up by Centre Gravity a couple of years ago.
Steers & tracks like a dream.
I wonder if it's soft engine mounts?
 
  
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Alfaian
Hockenheim


Joined: 12 Mar 2014
Posts: 641
Location: S.wales


PostPosted: Wed Sep 27, 2017 6:39 pm    Post subject: Reply with quote

stuarts wrote:
The car was actually set up by Centre Gravity a couple of years ago.
Steers & tracks like a dream.
I wonder if it's soft engine mounts?


Check age, wear, pressures and manufacturer of the tyres Thumb

Mine was the same and thought it was the character of the 911 until I put new Michelins on.

Old Pirelli's had about 2 to 3 mm on.

Porsche recommends to change tyres at 3 mm I believe.
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Bikeracer1098
Österreich


Joined: 28 Mar 2015
Posts: 898
Location: Camberley, Surrey


PostPosted: Wed Sep 27, 2017 6:39 pm    Post subject: Re: 997 - first impressions Reply with quote

stuarts wrote:
So,
I picked up the 997 as mentioned here: http://911uk.com/viewtopic.php?t=123126&sid=8a2f5fe9292ec3f0a1f1253ba6f82d98

First impressions, wow, what a great car!
I thought with the Shrick cams, GT3 throttle body and remap it might be a bit woolly, but it pulls ok. I sat in crawling traffic for half an hour going through the Blackwall Tunnel and it was just fine.

Short shift isn't a problem, only for the first couple of shifts of a morning, just take it slow and ease into the slot and it's fine.

Brakes - spot-on, nothing to say.

Only thing I've noticed is, hitting the throttle hard, the car slightly torque steers (or feels like that) and pulls to the left. Sudden lift-off and it dips slightly to the right.
Not sure if this is down to worn dampers, suspension arm wear, engine mounts or just the LSD?

Any thoughts out there?
Cheers!


After 92,000miles probably needs a suspension and bushing refresh.

First time I've heard the tearm "Torque Steer" used on a rear wheel drive car.....lol
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FZP
Suzuka


Joined: 18 Jan 2015
Posts: 1054
Location: Cheshire


PostPosted: Wed Sep 27, 2017 6:58 pm    Post subject: Reply with quote

Alfaian wrote:
stuarts wrote:
The car was actually set up by Centre Gravity a couple of years ago.
Steers & tracks like a dream.
I wonder if it's soft engine mounts?


Check age, wear, pressures and manufacturer of the tyres Thumb

Mine was the same and thought it was the character of the 911 until I put new Michelins on.

Old Pirelli's had about 2 to 3 mm on.

Porsche recommends to change tyres at 3 mm I believe.

I should have been more specific, but you description of rear steer under acceleration was an issue I had due to an alignment issue. It may have had a knock to create the issue. The tyre pressure and tread depth is highly relevant as 2psi on mine makes it feel broken.
If you're in range of CG, it would be worth a health check as I don't think Chris would have gone to the effort of a geo if there was evidence that the suspension components were getting towards EOL anytime soon.
I've not had any experience with engine mounts so can't comment.
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stuarts
Newbie


Joined: 15 Sep 2017
Posts: 19



PostPosted: Wed Sep 27, 2017 7:32 pm    Post subject: Reply with quote

Tyres are Michelin Super Sport tread on rears about 5mm, pressures were 33 & 32 rears and 30 on the fronts.
Can't imagine 1psi would be the issue!

When the car was at CG, they did check over all the susp and changed a few track rod ends only.
 
  
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Alfaian
Hockenheim


Joined: 12 Mar 2014
Posts: 641
Location: S.wales


PostPosted: Wed Sep 27, 2017 8:11 pm    Post subject: Reply with quote

32 in rears ?

Should 40.
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FZP
Suzuka


Joined: 18 Jan 2015
Posts: 1054
Location: Cheshire


PostPosted: Wed Sep 27, 2017 9:14 pm    Post subject: Reply with quote

Go put some air in those tyres. It's way down. Love to hear your thoughts once they're properly filled. Thumb
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stuarts
Newbie


Joined: 15 Sep 2017
Posts: 19



PostPosted: Wed Sep 27, 2017 9:30 pm    Post subject: Reply with quote

Ah, will do and will report back
 
  
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stuarts
Newbie


Joined: 15 Sep 2017
Posts: 19



PostPosted: Thu Sep 28, 2017 12:25 pm    Post subject: Reply with quote

Ah, now that's made a difference!
Have gone 33/40.
Can't believe I made such a school boy error in not thinking tyre pressures first Laughing
 
  
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FZP
Suzuka


Joined: 18 Jan 2015
Posts: 1054
Location: Cheshire


PostPosted: Thu Sep 28, 2017 2:01 pm    Post subject: Reply with quote

You're not on minimum pressure yet on the front, 34 psi. c'mon chop chop. Hand
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stuarts
Newbie


Joined: 15 Sep 2017
Posts: 19



PostPosted: Thu Sep 28, 2017 3:48 pm    Post subject: Reply with quote

Ok, ok,
34 now in the fronts.
Happy now? Laughing
 
  
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FZP
Suzuka


Joined: 18 Jan 2015
Posts: 1054
Location: Cheshire


PostPosted: Thu Sep 28, 2017 4:09 pm    Post subject: Reply with quote

Happy for you mate. I did say in my 2nd post, that psi makes a huge difference in these cars....
I'm glad it was something simple rather than work components. Time to enjoy
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resigner
Österreich


Joined: 19 Dec 2013
Posts: 937



PostPosted: Thu Sep 28, 2017 4:40 pm    Post subject: Reply with quote

I run 34 and 39 on mine, but it is a cabrio....
 
  
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James M-S
Monza


Joined: 11 Apr 2017
Posts: 246
Location: Derby

2009 Porsche 997 Carrera 2

PostPosted: Fri Sep 29, 2017 10:50 am    Post subject: Reply with quote

I'm surprised someone hasn't chipped in about measurement system analysis! (How reliable/repeatable/accurate) is your gauge?

Glad it's sorted for you now though!
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DucatiRob
Suzuka


Joined: 22 Jul 2015
Posts: 1231
Location: Milton Keynes

2006 Porsche 997 Carrera 2S

PostPosted: Sat Sep 30, 2017 11:14 am    Post subject: Reply with quote

I have found that the MPSS appear to be far more sensitive to tyre pressures, certainly over the Bridgestone Potenza's I replaced. Worth investing in a decent quality gauge as the petrol station forecourt ones are very unreliable.
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FZP
Suzuka


Joined: 18 Jan 2015
Posts: 1054
Location: Cheshire


PostPosted: Sat Sep 30, 2017 11:39 am    Post subject: Reply with quote

DucatiRob wrote:
I have found that the MPSS appear to be far more sensitive to tyre pressures, certainly over the Bridgestone Potenza's I replaced. Worth investing in a decent quality gauge as the petrol station forecourt ones are very unreliable.

+1 on both points
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