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Hywelrsvr
Newbie


Joined: 29 Apr 2012
Posts: 9



PostPosted: Sat May 26, 2012 4:19 pm    Post subject: 930 turbo vague front end at high speed Reply with quote

Hi all, Over about 70mph it's all bait vague and not planted.

I have 30,000 miles, new tyres etc what do I start with?

I have a big shopping list but do I need new dampers, bushes etc all round to make it really work?

Thanks
 
  
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Greg66
Silverstone


Joined: 14 Sep 2011
Posts: 122



PostPosted: Sat May 26, 2012 4:37 pm    Post subject: Reply with quote

This may sound a bit bonkers, but does it settle down if you go a bit faster?

I spent a day with CAT DT recently and found that my car (996) goes through a light patch then firms up. I was told that the centre of air pressure on the car moves further forward from the roof tot the windscreen to the bonnet the faster you go, helping to tie down the front end.
 
  
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berni29
Watkins Glen


Joined: 24 Oct 2009
Posts: 2196
Location: Kent


PostPosted: Sun May 27, 2012 4:43 am    Post subject: Reply with quote

Hi

Is the car on the original suspension? If so then after this length of time you can expect some of the rubber components to have gone off. As for the dampers, well, I would be changing those if original!

I an not familiar with the 930 front end, but if it has any rubber bushings in there then they will want changing if original.

All the best

Berni
_________________
993 C2 Tip 1994 187k miles. Black and Grey. M029 & Bilstein HD's, Elephant Racing RS bushes F&R, RS mounts, strengthened engine carrier, 100 cell cat inserts, HID's. Solid steering arms mod, top of the engine rebuilt, mapped by Wayne, suspension set up by Chris.
 
  
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Maxie
Yas Marina


Joined: 11 Mar 2007
Posts: 8386
Location: London


PostPosted: Sun May 27, 2012 5:52 am    Post subject: Reply with quote

Greg66 wrote:
I spent a day with CAT DT recently and found that my car (996) goes through a light patch then firms up. I was told that the centre of air pressure on the car moves further forward from the roof to the windscreen to the bonnet the faster you go, helping to tie down the front end.


Is there an aerodynamicist in the house? This is interesting.

~ Maxie Scratch Chin
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Currently Porscheless, 2018 BMW 640d M Sport +
 
  
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Hywelrsvr
Newbie


Joined: 29 Apr 2012
Posts: 9



PostPosted: Tue May 29, 2012 7:11 pm    Post subject: Reply with quote

Greg66 wrote:
This may sound a bit bonkers, but does it settle down if you go a bit faster?

I spent a day with CAT DT recently and found that my car (996) goes through a light patch then firms up. I was told that the centre of air pressure on the car moves further forward from the roof tot the windscreen to the bonnet the faster you go, helping to tie down the front end.


Not that I noticed!

But I'm not that brave with no power steering I would expect to be able place it on a coin but I'm nowhere near, think the bushes and dampers should do it, but I like your idea.

Thanks
 
  
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Red993C4
Magny-Cours


Joined: 09 Dec 2010
Posts: 2723
Location: S. Wales


PostPosted: Tue May 29, 2012 8:52 pm    Post subject: Reply with quote

Maxie wrote:
Greg66 wrote:
I spent a day with CAT DT recently and found that my car (996) goes through a light patch then firms up. I was told that the centre of air pressure on the car moves further forward from the roof to the windscreen to the bonnet the faster you go, helping to tie down the front end.


Is there an aerodynamicist in the house? This is interesting.

~ Maxie Scratch Chin


I'm no aerodynamicist, but do think that that that could only make sense if the 996 had aerodynamic downforce on the front end (as opposed to lift).
It doesn't, by a long way. Dont know
 
  
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Red993C4
Magny-Cours


Joined: 09 Dec 2010
Posts: 2723
Location: S. Wales


PostPosted: Tue May 29, 2012 8:59 pm    Post subject: Re: 930 turbo vague front end at high speed Reply with quote

Hywelrsvr wrote:
Hi all, Over about 70mph it's all bait vague and not planted.


I've never driven a 930 Turbo, but the model is famous for being a car for fans of sweaty palms. Your car may well be perfectly normal. Dont know
 
  
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SEE YA
Barcelona


Joined: 19 Aug 2003
Posts: 1349
Location: United Kingdom South West.


PostPosted: Wed May 30, 2012 7:21 am    Post subject: Reply with quote

You have to remember these cars, are over twenty years old people.
They will not drive like todays cars, also things like shocks and bushes are
often overlooked by many 930 owners they
are the last things that people replace as well. You would be surprised how tight and firm a new set of shocks etc, make a 930 drive better.
These cars have no driver aids like PAS etc.
When I was looking for a 930, I drove many they were all not the same ride.


Just asking has the car been in a accident before maybe?
_________________
EVERY MILE IS A SMILE

SEE YA

Last edited by SEE YA on Wed Dec 19, 2012 9:16 am; edited 1 time in total
 
  
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Hywelrsvr
Newbie


Joined: 29 Apr 2012
Posts: 9



PostPosted: Thu May 31, 2012 3:42 pm    Post subject: Reply with quote

SEE YA wrote:
You have to remember these cars, are over twenty years old people.
They will not drive like todays cars, also things like shocks and bushes are
often overlooked by many 930 owners ans are the last things that people replace as well. You would be surprised how tight and firm a new set of shocks etc, make a 930 drive better.
These cars have no driver aids like PAS etc.
When I was looking for a 930, I drove many they were all not the same ride.


Just asking has the car been in a accident before maybe?


Hi - See Ya!

I completely agree, and it's booked in for new bushes and shocks at GT1 - and I really look forward to driving the car after that.

No happily it hasn't been in an accident I had a full pre-purchase Porsche Inspection undertaken pre-purchase.

I think it's as you say - just very tired rubber.

Cheers
 
  
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Hywelrsvr
Newbie


Joined: 29 Apr 2012
Posts: 9



PostPosted: Tue Dec 18, 2012 9:00 pm    Post subject: Vague front end Reply with quote

Just to complete this thread I took the 930 to GTOne who did a geometry check and took a lot of money and didn't fix the problem at all.

Then it went to Autofarm who rechecked the geometry and found it was way off and when all was released found that it had been screwed tight on one wheel only. So after being reset and new rear dampers its fabulous.

Thanks for the advice.
 
  
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SEE YA
Barcelona


Joined: 19 Aug 2003
Posts: 1349
Location: United Kingdom South West.


PostPosted: Wed Dec 19, 2012 8:32 am    Post subject: Reply with quote

Good news, there are many 930's out there and the shocks are so often overlooked by owners.

When I was looking for a 930, not one had there shocks replaced.
_________________
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SEE YA
 
  
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