Notices
911 Forum 1964-1989
Sponsored by:
Sponsored by: Intercity Lines, LLC

911 SC chassis flex

Thread Tools
 
Search this Thread
 
Old Nov 11, 2009 | 02:46 PM
  #1  
tvanbroekhoven's Avatar
tvanbroekhoven
Thread Starter
Track Day
 
Joined: Jul 2009
Posts: 23
Likes: 0
Default 911 SC chassis flex

Hi guys

I noticed when jacking up my car at the jack point the door closes harder. (jack point = the receiver for the standard Porsche jack in the rocker)

Is this normal or should I suspect rust ?

Since this is my first post, here's a picture of my car doing what it's made for :


Reply
Old Nov 11, 2009 | 03:50 PM
  #2  
whalebird's Avatar
whalebird
Race Car
 
Joined: Nov 2004
Posts: 3,993
Likes: 3
From: Blue Ridge Mountains NC.
Default

Cool looking euro car. Welcome. Usually coupes are pretty rigid as that is one of the halmark characteristics of a 911. Now targa and cabrio versions are real flexible and sometimes imposible to open and close the doors when on a lift or jack stands. Lots of debate over the targa/cabrio integrity as track cars. Your coupe's flex should be minimal but still, depending on where you jack it up and how it's supported, could show flex. Especially if the door is a little out of adjustment to begin with. Stay tuned and wait for some others to chime in. You have come to the right place for Porsche info and discussion. Welcome to Rennlist.
Reply
Old Nov 11, 2009 | 03:58 PM
  #3  
iJeremy's Avatar
iJeremy
Addict
Rennlist
Site Sponsor

15 Year Member
 
Joined: Sep 2006
Posts: 569
Likes: 0
From: Standing over a flat six
Default

Jebus that was a big picture... And closing a little tougher is pretty normal, I wouldn't jump the gun and assume rust is the culprit, but it's certainly worth having a good look around. Hows the front Pan?... signs of rust there?, if not you're probably ok as thats usually the first spot to go.
Reply
Old Nov 11, 2009 | 06:32 PM
  #4  
theiceman's Avatar
theiceman
Team Owner
20 Year Member
 
Joined: Aug 2005
Posts: 28,410
Likes: 1,611
From: Cambridge Ontario Canada
Default

the pic isn't big enough .. could you enlarge it a little ? naw i think that is fairly normal . the car wasn't really designed to sit like that ...
Reply
Old Nov 11, 2009 | 06:43 PM
  #5  
abe's Avatar
abe
Burning Brakes
 
Joined: Nov 2007
Posts: 1,188
Likes: 11
From: Thousand Oaks. CA
Default

Also roll down the windows when jacking up the car....I have seeing windows brake on old cars because of flexible chassis.
abe
Reply
Old Nov 11, 2009 | 06:56 PM
  #6  
rusnak's Avatar
rusnak
I haddah Google dat
Rennlist Member
 
Joined: Nov 2008
Posts: 11,501
Likes: 5
From: Fresno, CA
Default

my coupe doors are slightly tighter when one end is jacked up (front or rear). When I put all 4 corners on jackstands though, it's as if the car were on the ground.

I can't say that the coupe flexes a lot less than the 914, which is a targa, or the 356 Cab, which has some huge side longitudinals.

I don't want to add to the debate, but I have not noticed personally any less flex in the coupe. I think on all 911s it is good to adjust the door so that it closes well with minimal amount of "pop" when you open a door.
Reply
Old Nov 11, 2009 | 09:18 PM
  #7  
MUSSBERGER's Avatar
MUSSBERGER
uninformed gas bag
(contemplating on whether gas bag is one or two words)
Rennlist Member
15 Year Member
 
Joined: Dec 2006
Posts: 20,517
Likes: 188
From: Melbourne Beach
Default

Its not a worry. Dude the picture..........
Reply
Old Nov 12, 2009 | 12:55 AM
  #8  
Edward's Avatar
Edward
Addicted Specialist
Rennlist Member
20 Year Member
 
Joined: Jun 2001
Posts: 6,242
Likes: 438
From: So.CA
Default

Naw, you're fine ...normal.

Great wheels! I have the silver version of those BBS' ...your golds look great with the body color!


Edward
Reply
Old Nov 12, 2009 | 04:27 AM
  #9  
tvanbroekhoven's Avatar
tvanbroekhoven
Thread Starter
Track Day
 
Joined: Jul 2009
Posts: 23
Likes: 0
Default

Thanks for the replies !

There's no rust te be found on the front suspension pan or elsewhere (last year I took the car apart for a respray so I'm pretty sure). Was just worried about rust in the rockers...

I'll try to post a smaller pic tonight (euro time)
Reply
Old Nov 18, 2009 | 04:27 PM
  #10  
FranzBlamRacing's Avatar
FranzBlamRacing
Former Vendor
 
Joined: Jul 2009
Posts: 174
Likes: 0
From: Tucker, Georgia
Default

There is nothing to be concerned about based on your description. Welcome to Rennlist.

-FBR
Reply
Old Nov 18, 2009 | 04:48 PM
  #11  
Steve Weiner-Rennsport Systems's Avatar
Steve Weiner-Rennsport Systems
RL Technical Advisor
 
Joined: May 2001
Posts: 11,870
Likes: 75
From: Portland Oregon
Default

What you described is completely normal.
Reply
Old Nov 19, 2009 | 10:11 AM
  #12  
tvanbroekhoven's Avatar
tvanbroekhoven
Thread Starter
Track Day
 
Joined: Jul 2009
Posts: 23
Likes: 0
Default

Thanks guys!

Very comforting!
Reply




All times are GMT -3. The time now is 11:02 AM.