Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Running gear
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #11  
Old 28th February 2010, 10:39 AM
correl correl is offline
Senior Member
 
Join Date: Jan 2010
Posts: 105
Default


Last edited by correl : 28th February 2010 at 10:44 AM.
Reply With Quote
  #12  
Old 28th February 2010, 10:47 AM
correl correl is offline
Senior Member
 
Join Date: Jan 2010
Posts: 105
Default

Has anyone have one of these on the road for a year or 2 yet?? i am just interested as to whether the lower joint is prone to needing replacing alot??
Reply With Quote
  #13  
Old 28th February 2010, 10:58 AM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,337
Default

If you decided that you needed bracing, you would have to be 100% sure that the distance between the locating points remained 100% identical throughout the travel. I am not sure on the haynes but on many double wishbone setups the distance would alter duting travel.

The Locost uses the same balljoints just on cortina uprights, there has not been any complaints that I am aware of.. Try LCB site as they have a large number of running cars.

Westfield and Caterham also usse simialr setups on LVP cars.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost 4181.65 - Last - Wheel Cylinders
Reply With Quote
  #14  
Old 28th February 2010, 10:58 AM
GraemeWebb's Avatar
GraemeWebb GraemeWebb is offline
Member
 
Join Date: Jan 2010
Location: Rugby, Warwickshire
Posts: 91
Default

Quote:
Originally Posted by correl View Post
That will not work as the upper and lower bones are not parallel so the length of you additional link will vary. In other words you suspension will be solid.
So far the comments from other builders are correct. Ford/BL would design the susension with high multiplication factors. I.e. they would design the part then add a factor (say x2) so that the part is as twice as strong as it needs to be. As the Roadster is going to be at least half of the weight of the donor tin top we have a factor of at least 4 times.

Having said that I have changed the design to suit my BMW upright and will use a Volvo ball joint. Piccies to follow.
Reply With Quote
  #15  
Old 28th February 2010, 11:01 AM
correl correl is offline
Senior Member
 
Join Date: Jan 2010
Posts: 105
Default

The only reason i am thinking of this is because my road has alot of annoying speed bumps and the mondeo tends to chew up lower arms because of them at a rate of a set every couple of years and was thinking about the fact your adding weight to the lower arms than there is on the mondeo as standard as there is none its all sheering forces and on the kit car it would have all the sheering forces and 25+% of the weight of the too each side.
Reply With Quote
  #16  
Old 28th February 2010, 11:02 AM
Bonzo's Avatar
Bonzo Bonzo is offline
Senior Member
 
Join Date: Jul 2007
Location: Cornwall
Posts: 3,321
Default

I do uderstand where you are coming from .... Alas, I am not a suspension designer & unable to give you the guidance that you so obviously need

As previously mentioned .... This is a well proven & trusted suspension design.

On the subject of joint replacement, yes of course over time the joints will need to be replaced.
Joint replacement on all types of suspension systems need replacing from time to time .... After all .... They are a service part.

Spent the best part of the last 30 -40 years changing ball joints
In the case of the Mcphereson strut ..... I have changed a fair few top bushes/bearing assemblys.

It may intrest you to know that many of the early Triumphs used an almost identical front suspension set up as the Roadster, in it's day, thought to be well advanced engineering ..... My point is .... I had to change the upper joints almost as frequently as the lower ones, must have been some even loads in there somewhere
__________________
I am not a complete idiot...........Some of the parts are missing !!
Ronnie

www.roadster-builders.co.uk
Reply With Quote
  #17  
Old 28th February 2010, 11:02 AM
deezee's Avatar
deezee deezee is offline
Senior Member
 
Join Date: Jan 2009
Location: Wirral
Posts: 744
Default

The more you post, the more the Haynes Roadster seems to be unsuitable for your requirements.
Reply With Quote
  #18  
Old 28th February 2010, 11:03 AM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,337
Default

Also remember, the maxi weighed in a 1 Ton.

The locost/roadster is about half that.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost 4181.65 - Last - Wheel Cylinders
Reply With Quote
  #19  
Old 28th February 2010, 11:06 AM
correl correl is offline
Senior Member
 
Join Date: Jan 2010
Posts: 105
Default

I think i am going to be spending some time with some wood lol

Working out the exact positions
Reply With Quote
  #20  
Old 28th February 2010, 11:11 AM
les g les g is offline
Senior Member
 
Join Date: Jan 2008
Location: S.E.Cornwall
Posts: 760
Default

WHOA.........GUYS......
You are all missing the point.....
The reason maxi balljoints are used in this car is............
they are designed to take the load that way .............
thats why you should not use other types
on a maxi the the suspension was on the lower arm
in effect trying to push the arm away from the upright...............
the maxi ball joint is designed especially for this purpose..if you used any old b/j tthey would fail quite quickly..

on a normal car (as we know them) the springing/suspension pushes down on top of the upright..

Hope that clears up this point chaps
cheers les g
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 08:02 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.