Avoneer
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| posted on 2/5/05 at 09:43 PM |
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Steering rack mount opinions
Hi,
Anyone got any opinions, ideas or suggestions on the way I have done the steering rack mounts, good or bad.
It's for a Mk2 Escort rack and mountings are roughly as per the book, apart from the rack being ever so slightly lower and the mounts being
carried on to the rail behind.
I had a problem with my Avon and the mounts flexing when the steering wheel is turned so should this be ok?
It's all 4mm x 30mm flat.
Cheers,
Pat...
 
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Avoneer
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| posted on 2/5/05 at 09:44 PM |
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Another view:
 
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Avoneer
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| posted on 2/5/05 at 09:46 PM |
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And another view:
 
Rescued attachment Rack3.JPG
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JoelP
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| posted on 2/5/05 at 09:49 PM |
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does the escort rack not need shortening? im just thinking that if it does get shortened, you would probably need to brace the left hand mount.  cos
shortened racks often just get sleeved together, and could pull apart.
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flak monkey
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| posted on 2/5/05 at 09:52 PM |
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Escort rack doesnt need shortening. (Its not that much too long)
Those mounts ought to be study enough if they are 4mm plate!
David
Sera
http://www.motosera.com
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Andybarbet
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| posted on 2/5/05 at 10:03 PM |
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My Luego Velocity chassis has a similar set up with rear supports - so i guess it should be fine.
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Peteff
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| posted on 2/5/05 at 10:09 PM |
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I've done similar with my next one but braced to the side rails as well.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Mark Allanson
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| posted on 2/5/05 at 10:10 PM |
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I think you are going to have to support the RH mount. The escort rack rubbers are very sloppy and one mount cannot support the other, I had to double
triangulate the mounts to get them stiff enough. Without the extra strengthening, the rack moved about 10mm!
 
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If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Avoneer
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| posted on 2/5/05 at 10:18 PM |
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Yeah, but won't the rack hold them the same distance apart and the diagonal stop either moving?
If not, how about another flat bar diagonal from the top back of the right mount to the bottom back of the left mount?
Or even a piece of 4mm flat on each side like in the book?
Cheers,
Pat...
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Avoneer
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| posted on 2/5/05 at 10:26 PM |
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Or how about removing the diagonal I have put in and doing the following with some 8mm solid round (it will tie the top of each mount together and
each mount to the chassis.
 
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niceperson709
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| posted on 3/5/05 at 12:43 AM |
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Hi Pat ,
over here in Oz they powers that be are very insistant that bump steer be elininated as much as posible and for a book chassis that meens that the
rack needs to be shortened by 103 mm . this is done by cutting the lh end and retreading it for the tie rod . the casing is then cut and shut to suit
. If you want NO bump steer you will have to shorten the rack .and this will affect how you mount it Personally i would use the 4mm thick strap under
the mounts and fabricate the supports in 25mm box . AS you are building a BEC every bit of weight saving helps . This is how I have done it , but
don't be disturbed by the fact that my rack is some what higher than usual my Chhassis is 50mm wider than the book and with the Toyota uprights
and Mk 1 escourt steering arms I have the option of raising the rack to achieve a better bump steer out come . any way I hope this helps .
Best wishes
Iain 
 
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Best wishes IAIN
life is not the rehearsal , it's the show so don't sit there thinking about it DO IT NOW
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britishtrident
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| posted on 3/5/05 at 06:43 AM |
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quote:
Originally posted by Avoneer
Yeah, but won't the rack hold them the same distance apart and the diagonal stop either moving?
If not, how about another flat bar diagonal from the top back of the right mount to the bottom back of the left mount?
Or even a piece of 4mm flat on each side like in the book?
Cheers,
Pat...
Follow Marks lead on this, I am going a stage further using book style brackets + Mark's bracing and and then using 1.2 mm plate across the
the front to tie the 4 hole where the rack mounts together.
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Avoneer
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| posted on 3/5/05 at 11:37 AM |
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So if I leave the flat bar diagonal I have put in and the put two cross braces of 8mm solid round from the top of each rack bracket diagonally down to
the outer chassis rail on each side, and weld them in the middle, that should be fine?
Will have a go and post some pics.
Pat...
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Avoneer
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| posted on 3/5/05 at 11:38 AM |
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In fact, if I do this, I may as well remove my flat bar diagonal...Lightweight BEC and all that.
Will take a pic when done.
Pat...
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MikeRJ
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| posted on 3/5/05 at 02:50 PM |
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The vast majority of the lateral forces will be taken by the large mount anyway. The small mounting rubber has very little lateral location on the
rack. This being the case, it's far more important that the support that locates the larger mounting is cross braced.
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Avoneer
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| posted on 3/5/05 at 09:28 PM |
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So, from a lightweight point of view, will the following do - it all seems very soild to me. 8mm solid round for the bracing and all the flat brackets
are 4mm.
Cheers,
Pat...
 
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Avoneer
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| posted on 3/5/05 at 09:29 PM |
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And a pic from behind...
 
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%20(WinCE).JPG)
