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
  #1  
Old 18th September 2014, 10:38 AM
jps jps is offline
Senior Member
 
Join Date: May 2012
Location: Colchester, Essex
Posts: 439
Default Anti-roll bars?

Just spotted this thread over on Locostbuilders: http://www.locostbuilders.co.uk/view...php?tid=193813

Has anyone on here put an anti-roll bar into their setup? I'm not expecting to....?!
Reply With Quote
  #2  
Old 18th September 2014, 12:07 PM
TalonMotorFabrication TalonMotorFabrication is offline
Senior Member
 
Join Date: Jun 2011
Location: Southminster Essex
Posts: 260
Default

Difficult subject this depending on your point of view. There are people who say that an anti roll bar is needed because their car has too much body roll through corners, how ever I wonder if they have ever had their car corner weighted to gain the correct spring rates along with matched piston valves, adjustable bump and rebound coilovers? It is often the case that people just don't spend money on the right parts of the suspension and get it set up properly to get the best from what they all ready have.
Coming from racing in Autograss you see people putting a pair of 1000cc bike engines in the back of a mini and spending £200 on coilovers and springs then wonder why they get blown away by a single bike engine with £1000 suspension set up?
It's all very well putting a 200hp+ engine in your Roadster but if all you are going to do is follow the heard with the spring poundage,buy the cheapest coilovers and just go with tracking setup by an MOT station don't complain that it's not the 'drives like it's on rails' car that you thought it would be.
One of the reasons that the Roadster or the Locost does not have an antiroll bar is that the chassis is so sparse at the front that the whole thing twists as it goes over bumps and round corners, if you add an anti roll bar to that how long will the mounts on your 1.5mm walled chassis last?
__________________
Unofficially rated No.1 supplier of fabricated Haynes Roadster parts by the workshop rat population.

Direct email talonmotorfabrication@gmail.com
Reply With Quote
  #3  
Old 18th September 2014, 10:01 PM
flyerncle flyerncle is offline
Senior Member
 
Join Date: Mar 2008
Location: gateshead,near cobbly bit of A1 North
Posts: 3,188
Default

You have left out the fact that probably not one that is being made is in fact a "Haynes Roadster " but the builders version of what is in the book, and I am inlcined to agree it's a can of worms to add to the car in regard to rates etc.
__________________
Cost : Little as possible.
Thanks : To those who by their generosity my build has progressed.
Its a handmade sports car not a flaming kit car !!!


If at first you dont succeed,avoid skydiving...

No parachute require to freefall,only if you want to do it twice.
Reply With Quote
  #4  
Old 19th September 2014, 10:59 AM
K4KEV's Avatar
K4KEV K4KEV is offline
Senior Member
 
Join Date: Feb 2010
Location: WINGATE CO DURHAM
Posts: 1,511
Default

Well I have been hooning about most of this summer and the body roll on my car is hardly perceptible so I would say if you have a roadster with an amount of body roll that bothers you then I would check your shocks and springs are the right ones because they won,t be
Reply With Quote
  #5  
Old 21st September 2014, 04:46 PM
baz-r baz-r is offline
Senior Member
 
Join Date: Nov 2009
Posts: 1,464
Default

i had no issues with my setup for road use but when it come to steep hairpins and esses with elevation changes on my hillclimb events its clear the car could benifit form antiroll bars and lighter spring rates to match.
as meny racers have pointed out to me you cant over do spring rates and damping on a light car (unless you want to end up with a ditch finder)
saying that i would never drive this hard or as close to the limit public roads!

photos of my car on the hill mid hairpin show the rear outer stuffed well into the arch yet the car feels fairly leval. even with my lsd i still struggle to get the drive on early enough.
Reply With Quote
  #6  
Old 21st September 2014, 09:03 PM
MikeB MikeB is offline
Senior Member
 
Join Date: Apr 2007
Location: Nr Wellingborough
Posts: 512
Default

For a roadster that wil spend most of its time on the road, i'd say if you spend some time getting the set up right you won't need them. From recollection Lotus try to use the smallest bars possible on their roadcars..
For a track car adjustable bars are really handy, especially swapping from a dry set up to a wet set up and making tweeks to the under/oversteer balance.

I'd tweak spring rates, front/rear ride heights and damper settings to get a setup I'm happy with for the road, if that still wasn't good enough I'd consider fitting some.
__________________
Build Cost so far £xxx (Given up adding it up) - She Starts!! Build Thread Here:
http://www.haynes.co.uk/forums/showthread.php?t=5501
Reply With Quote
  #7  
Old 23rd September 2014, 11:14 PM
alga's Avatar
alga alga is offline
Senior Member
 
Join Date: Feb 2009
Location: Vilnius, Lithuania
Posts: 1,249
Default

Quote:
Originally Posted by MikeB View Post
For a roadster that wil spend most of its time on the road, i'd say if you spend some time getting the set up right you won't need them. From recollection Lotus try to use the smallest bars possible on their roadcars..
In my understanding, for road use, rollbars keep body roll in check while making you afford much softer springs for better comfort.

From experience, the ride comfort of my roadster increased a lot when I greased the poly bushings. Also, after about 5000 km, it seems that the shocks are quite a bit softer than they used to be on their softest setting.
__________________
Albert
Haynes Roadster FAQ | Haynes Builder Locations
Gallery, build thread in Lithuanian / via Google Translate.
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 10:20 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.