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Author: Subject: Mk2 Quick Steering Rack
Evrim

posted on 28/7/07 at 07:23 AM Reply With Quote
Mk2 Quick Steering Rack

Hi,
Are there any disadvantages of using Mk2 2.9 Quick Steering Rack for Avon?What is the standard ratio of Escort Mk2 rack?

Evrim

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David Jenkins

posted on 28/7/07 at 07:47 AM Reply With Quote
Standard Escort rack is around 3.5. The quickest rack commonly available is 2.4, but that can be too quick for some (but it's what I've got!). If you've got reasonable castor (i.e. your self-centering is respectable) then 2.4 is fine, but it is a bit more tiring on long journeys, and you may experience more 'kick-back' through the wheel on bumpy roads. If you don't have much self-centering then 2.4 can be 'interesting'...

Some people on here have even lower ratios, but I don't think they are Escort racks.

2.9 is generally a very good 'in-between' ratio.

[Edited on 28/7/07 by David Jenkins]






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big_wasa

posted on 28/7/07 at 08:34 AM Reply With Quote
Its what I am fitting and cheaper aswell
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RazMan

posted on 28/7/07 at 09:58 AM Reply With Quote
I had a 2.4 Escort rack and found it a tad too quick for my road car so I swapped it to a 2.9 which I am much happier with. There is much less effort required to keep everything straight on motorways and bumpy B roads are more relaxed too.





Cheers,
Raz

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Ratters

posted on 28/7/07 at 10:55 AM Reply With Quote
I have a 2.4 & I seem to get on fine with it. It does feel a bit twitchy sometimes on b-roads/lanes when a bit bumpy though you do get used to it.
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nitram38

posted on 28/7/07 at 11:31 AM Reply With Quote
Hmmmmm..........kickback over bumps.
Sorry, has no bearing on rack ratio, more to do with bump steer.
Also "tiring" on long journeys has more to do with not enough castor.
My rack is only 1.25 turns lock to lock and I have zero bump steer.
Castor is 7 degrees.
It's not pleasent to put up with incorrect steering as it is you who gets fatigued.
Get your rack postion and castor sorted is my best advice and it won't matter what ratio you use.






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David Jenkins

posted on 28/7/07 at 12:08 PM Reply With Quote
We've had this discussion before!

By 'tiring' I mean that you have to concentrate a bit more, as any minor hand movements will move you on the road much more. Not a problem with correct castor, and you soon get the feel for it.

By 'kickback' I meant when a wheel hits something, even at slow speeds, for example the raised kerb between my drive and my neighbour's when I reversed a few weeks back - the wheel jolted quite sharply. I didn't mean that the car swerves around on the road as you go along, or that the wheel jerks in my hand!

I will agree that there would be a significant problem if there's insufficient castor, as I said originally. The driver would have to continually adjust the steering to maintain a steady path. Unfortunately, too many kit 'sevens' follow the book measurements and don't have enough...

I have plenty of castor - also around 7 degrees - as I modified my top wishbones. Generally the car is fine on the road.






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nitram38

posted on 28/7/07 at 12:19 PM Reply With Quote
Yes with good castor the car is brilliant in a straight line, but also "helps" the steering unwind out of a bend so should cause less work with the wheel.
With a 1.25 LTL I only have to think about changing lanes and it is done!
This makes double check every angle/view before I decide to change lanes and also I have to concentrate more.






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RazMan

posted on 28/7/07 at 02:10 PM Reply With Quote
My car doesn't suffer with bump steer but the twitchyness around bumpy B roads is caused by the inertia of my arms reacting to the bumps - the steering is solid and it's me that wobbles Also motorway miles just seem more relaxed as I do not have to keep such a firm grip on the wheel.

Adjusting the column to bring the wheel closer helped a bit but there's only so much you can do. I just found that the 2.9 rack suited my (wobbly) driving style





Cheers,
Raz

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