worX
|
| posted on 23/8/07 at 05:15 AM |
|
|
Hi Col,
to get you through the SVA, which is all your bothered about right now obviously, I would also recommend a couple of degrees TOE OUT and run High Tyre
Pressures.
ATB
Steve
|
|
|
|
|
Dillinger1977
|
| posted on 23/8/07 at 07:28 AM |
|
|
i had a lot of negative camber on mine when it failed. Straightened them up and lowered my tyre pressures to about 18 and it was fine.
(yep, i see people saying higher, but I incresed mine a lot on the way to the test center, and took it to a local car park. the car felt twitchy and
I didnt like it so deflated them again before I drove to the test centre)
slightly contradictory to whats been said above, but I guess its a case of keep fiddling until you find something you like.
-Rog
|
|
|
David Jenkins
|
| posted on 23/8/07 at 08:11 AM |
|
|
I'm with nitram on this one - a decent amount of self-centering makes driving so much sweeter. As I drive along I have to push the wheel into a
corner, so to speak, and it'll tend to pull itself straight once I relax on the way out. You don't have to spend the entire journey
aiming the car down the road.
However, that's not the point of this thread! Getting the man through tomorrow's SVA is the current aim - consensus seems to be:
1. up the tyre pressures - the car's being trailered, so it shouldn't be a problem for a while.
2. zero toe-in, or minimal toe-out - don't make it too obvious.
Once you've passed (fingers crossed) then I strongly recommend getting it sorted ASAP.
Good luck,
David
|
|
|
02GF74
|
| posted on 23/8/07 at 08:45 AM |
|
|
slightly OT but why aren't kits made to have an adjustment for the castor?
my formula27 - not built by me - has an angle brakect to which the lower 'bones brqckets are welded on and the bracket is held to the chassis
via bolts in slots. This allows some to and fro movement and hance castor angle adjustment. (can't be done on top due to rocker arms)
Ok, so thinking about it, it is quite a heavy and non-elegant soloution but I had no self-steering problem.
I can't say I am that familar with 'bones and bushes but if the brakcets were made to be 10 mm wide and washers used to take up the space
between the wishbone bush and bracket, then wouldn't that give adjusment, as well as allow for slight inaccuracies in construction?
(got me thinking that maybe I should do something like that soi save some weight....).
going back to the problem - can you remove the rearmost brackets and weld them a bit further back and use weashers/shims to take up the gap? Quicker
& easier I would have thought than making up a set of top wishbones.
|
|
|
zxrlocost
|
| posted on 23/8/07 at 08:56 AM |
|
|
hi colin
pump your tyres right right up!!!!!!
this is why the less pressure in the tyres the more surface of the tyre touching the ground then the more harder it is for the tyre to be pushed out
ie way to much grip
if you pump your tyre up the tyre raises from the edge inwards off the ground.
ta chris
|
PLEASE NOTE: This user is a trader who has not signed up for the LocostBuilders registration scheme. If this post is advertising a commercial product or service, please report it by clicking here.
|
locoboy
|
| posted on 23/8/07 at 12:06 PM |
|
|
Cheers Chris,
Steve,
It would appear that you have not read the whothe thread lol,
I said that my test is conducted in accordance with the manual,evidently not the way yours was.
The test involves driving in excess of 10mph, if anyone drove my car in excess of 10mph and applied full lock, the lack of self centering would be the
least of their worries, the incoming punch on the chin would be furthe up on their list of problems!
The self centering test 'should' not involve full lock at any point hence my statement about springs in the rack too.
ATB
Locoboy
|
|
|
nitram38
|
| posted on 23/8/07 at 12:15 PM |
|
|
quote:
Originally posted by locoboy
Cheers Chris,
Steve,
It would appear that you have not read the whothe thread lol,
I said that my test is conducted in accordance with the manual,evidently not the way yours was.
The test involves driving in excess of 10mph, if anyone drove my car in excess of 10mph and applied full lock, the lack of self centering would be the
least of their worries, the incoming punch on the chin would be furthe up on their list of problems!
The self centering test 'should' not involve full lock at any point hence my statement about springs in the rack too.
Then they are on to the toe out "bodge"?
Otherwise they would do the full lock test.
The only answer is more castor if you want it to self centre the way you describe.
Toe out will only make it attempt to centre from full lock.
|
|
|
David Jenkins
|
| posted on 23/8/07 at 12:51 PM |
|
|
This all comes back to the same conclusion - if the castor is right, the self-centering works and the car passes the SVA. If there is insufficient
castor, bodges are required, which may or may not result in a pass.
I know which option I prefer...
|
|
|
locoboy
|
| posted on 23/8/07 at 07:51 PM |
|
|
Right,
Tyres up to 32psi,
A small ammount of toe out, just noticable and it made a slight attempt to self centre on my narrow not very smooth road.
fingers crossed,
thanks for all your input and advice as usual guys.
ATB
Locoboy
|
|
|
RazMan
|
| posted on 23/8/07 at 08:33 PM |
|
|
Hope it goes well Colin - keep us all posted.
Just my two penneth - have you greased your ball joints prior to assembly? I noticed my Cortina uprights were very stiff and the track rod ends were
too, resulting in a very stiff feel to the rack.
Mine still doesn't self centre despite having loads of castor, making hard work of town driving. I keep hoping it will get better with a few
more miles on the clock but 8k miles later I am still waiting. tbh I don't see how it passed SVA 
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
locoboy
|
| posted on 23/8/07 at 09:09 PM |
|
|
Raz,
Not greased the joints,
it has always been a surprise to me that there are never grease nipples on ball joints for everyday cars.
Fingers crossed and it should be MAC certificate tomorrow, then off up to Harrogate to see a mate of mine for a few beers before he flys back out to
the states for another year.
ATB
Locoboy
|
|
|
blakep82
|
| posted on 24/8/07 at 11:56 PM |
|
|
how'd the retest go?
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
|
|
|
tks
|
| posted on 25/8/07 at 07:45 AM |
|
|
quote:
Originally posted by blakep82
how'd the retest go?
yeah how it went.. infact not being here but outside is good news...
The above comments are always meant to be from the above persons perspective.
|
|
|
Macbeast
|
| posted on 25/8/07 at 08:19 AM |
|
|
As it says in SVA thread -
Flew through emissions and self centering thanks to all you guys who have helped out and answered questions over that last couple of years.
Congratulations Loco
|
|
|
