home news shop history forum membership galleries regions calendar contact
   

Go Back   106 Rallye Register Forum > TUNING, MODIFICATIONS & UPGRADES > Suspension, Handling & Brakes

Suspension, Handling & Brakes Suspension set ups, uprated brakes

Reply
 
Thread Tools Display Modes
Old 04-11-2018, 11:04 AM   #1
micheldeman
106 RALLYE REGISTER MEMBER
 
micheldeman's Avatar
 
Join Date: Jul 2014
Location: Netherlands
Posts: 303
User Gallery
angle of steering rods

I have lowered the front of my 106 about 4cm. I have converted the front struts to GAZ gold and told them to lower the steering arms 4cm as well. I haven't measured the original positions of the steering arms on the strut before I sent them off to GAZ, so don't know whether GAZ has lowered the steering arms correctly. Anyway, today I was fitting helper springs to my front setup and made the following picture.
I can see that there is already a positive angle from the steering rack mounting point to the tie rod end, meaning the tie rod ends sit higher than the inner tie rod ends. This will only increase once the car is back on its wheels. Shouldn't the steering rods have a slightly negative angle to minimise the bumpsteer effect?

micheldeman is offline   Reply With Quote
Old 04-11-2018, 12:13 PM   #2
sandy309
106 RALLYE REGISTER ENGINE TECHNICAL ADVISOR

 
sandy309's Avatar
 
Join Date: Feb 2004
Location: Cornwall
Posts: 6,703
User Gallery
The only way to correct it is scientifically, ie take it to someone who is equipped to measure and adjust bump steer. flipping the joints makes it much worse, don't get talked into that, it has to be measured before and after adjustment to be of any value, the bump steer moves through an "S" arc with a wishbone and strut, the alterations needs to made based on data, not guesswork and thumbnail advice.
__________________
sandy309 is offline   Reply With Quote
Old 04-11-2018, 12:38 PM   #3
welshpug
106 RALLYE REGISTER MEMBER

 
welshpug's Avatar
 
Join Date: Mar 2006
Location: cwmcarn
Posts: 4,913
User Gallery
Having helped build some custom inverted struts for a 106 myself with some very Helpful input from Dave at Satchell engineering, very much along what Sandy said above, you definitely don't have to move them very far at all to get it to work very well, whilst not having the arms pointing up is not ideal too many get fixated on this and make things drastically worse.

here's a crude drawing I made with the measurements of a standard S1 rallye leg.

106 non pas front leg assembly

and here's what we ended up with, made to work with Spherical rod ends and larger diameter steering arms, using an escort conversion tube set and a 106 bilstein gravel insert, with hindsight the tube was a little too long, but when Dave checked and adjusted the steering geometry we had got it particularly close which is very lucky!


2018-01-15_08-04-25
welshpug is offline   Reply With Quote
Old 04-11-2018, 12:54 PM   #4
micheldeman
106 RALLYE REGISTER MEMBER
 
micheldeman's Avatar
 
Join Date: Jul 2014
Location: Netherlands
Posts: 303
User Gallery
I understand that when the wheel is moving up and down, the lower ball joint on the knuckle will move in and out as well as the tie rod end will do (probably causing the S arc). So it's a sum of both behaviours that should be adjusted to reduce bumpsteer as much as possible. However, when one (like me) is using the original suspension arm, adjustment of bumpsteer is limited to the steering arms only. Would it be interesting to have adjustable suspension arms and top mounts (which are fixed with mine), then the possibilities to align I realise now the wheels, set the camber, caster, toe-in/out and bumpsteer are much better, but for sure, you need someone who knows what he is doing, because this is complex stuff.
micheldeman is offline   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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 01:09 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.