speedyxjs
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| posted on 28/7/09 at 08:18 PM |
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Slight steering issue?
When i bolted the hubs and wishbones to the car a couple of weeks ago, i noticed that when i lift the hub, it steers slightly inward.
After an hour or so of head scratching, i realised that as the track rod is at a slight angle downward when the bottom wishbone is level, as the hub
is rising, the trackrod straightens out, causing a steering effect on the hub.
The only way i can see to resolve this is to lower the steering rack an inch.
Before i attack it with the angry grinder, i just wanted to ask whether it would cause a problem when driving if i left it?
How long can i resist the temptation to drop a V8 in?
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mad-butcher
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| posted on 28/7/09 at 08:35 PM |
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It's called bump steer, easy enough to dial out but very time consuming,
Thought I might have had a document on how to do it but fraid not
basically involves jacking up front of car removing shock absorbers, lower jack to ride height and set wheels to correct toe in.now jack car up (to
represent acceleration) and see whether you have toe in or out, now lower the jack (to represent braking )and take readings. with the use of spacers
under the rack, measure, shim, measure. untill corrected.
tony
[Edited on 28/7/09 by mad-butcher]
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blakep82
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| posted on 28/7/09 at 11:34 PM |
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as above you'll get bump steer.
read the 'how to build race and kit car braking and suspension systems' (i think thatsa what its called) book by des hammill(?)
basically, he says that most production cars have a lot of bump steer and millions of people drive them without knowing. i know my dads car is
terrible for it. driving on country roads needs far too much concentration than it ought to
i don't think it'll be a huge problem, but of course it won't be ideal. it might be alright if you left it
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speedyxjs
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| posted on 29/7/09 at 06:13 AM |
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Ok, thanks guys. I might take a little bit of metal off with the grinder to lower it a bit mut wont take too much off 
How long can i resist the temptation to drop a V8 in?
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Mr Whippy
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| posted on 29/7/09 at 08:57 AM |
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if you can lower it then go ahead
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ss1turbo
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| posted on 29/7/09 at 09:23 AM |
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IIRC then theoretically the inner knuckle of the steering rack needs to be in line with the wishbone pivot points, othwerise the track changes of the
wheel aren't matched with that of the rack. Also, pretty sure (and this seems to follow with what you've seen so far) the track rods need
to be parallel to the wishbones; i.e. is they're slightly drooping, then the track rods to at about the same angle..?
Long live RWD...
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