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Location:
Terrigal
Registered:
May 2002
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Rack'n'Pinion for RA28
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Thu, 04 September 2003 00:12
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Hi all, while im re-vamping the front suspension and possibly brakes in the Celica I'm also toying with the idea of setting it up with rack n pinion.
Reason for it is even with reconditioned steering components (tie rods, idler arm, pitman arm) the steering is still sloppier than i'd like it. Also the ratio sux. Plus a few cracks developing around where the steering box sits. Hmm and to have steering that even somewhat resembles my AE86 i'd be very happy!
So with all of the above I think I can justify the work, cost and R&D that'll go into putting rack n pinion steering in. I realise it isn't going to be an easy job and hope to setup most of it off the car so it isn't off the road for too long. Would like to buy another crossmember, control arms, steering knuckles, column etc and get most of the tricky stuff done out of the car then bolt it all in.
I already have a TA23 crossmember in the car that should help out as it bends around to the back of the car for a front mounted sump. Makes mounting the rack Much easier!
I've done lots of searching around for info on it and found lots of stuff that needs to be seriously considered when designing it such as bump steer and getting all the angles correct.
My first main question is though i've heard of KE70 racks being used, as well as Mazda 323 racks?
I had a look at pick n payless and heaps of KE70 cars with steering still complete out there. Anyone know why some people pick the Mazda 323 racks?
Thanks
Joel
[Updated on: Thu, 10 March 2005 04:02]
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Location:
c'town, NSW
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 04:01
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this is definitly a tech article that has been a long time comming...
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 04:24
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Yup well I'll take heaps of photos and notes along the way.
Was hoping to get some ideas from people who have already tackled the job before but starting to look like it'll be designed from scratch.
I noticed Dave's RA23 has R & P, does anyone know about that conversion?
Jamie's red twin turbo v8 TA22 has R & P also (mazda rack).
Cheers
Joel
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 06:03
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Dave has used the TA23 x-member, and a KE70 rack. He used a 1g-gze front sump also.....
Of course he did all the welding and stuff himself, so there is no better man to ask!
If you can, give him a call and take a look at his car in the flesh. Me personally i would LOVE racoon peanut steering. Damn sloppy ball gives me the poo's.... esp when the shitbox AE71 steers nicer... 
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 06:07
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Unreal mate thanks for clarifying what rack is in Dave's beast.
Yeah the sloppy ball does suck.
Probably next step is to find more out about the steering column if that needs to be changed also or if the RA item can be modified.
I might try and get out to pick n payless next weekend and grab some KE70 parts.
Cheers
Joel
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 06:11
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you would not believe i was having those very thoughts today whilst driving the AE71 out penrith/windsor way.... noticing how much i WASNT having to move the wheel left and right.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 06:14
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Yeah mate I know what you mean.. I hate driving the AE86 around for a week getting used to hardly ever turning the wheel more than 1/4 a turn then getting in the Celica and same corners turning it 1/2 turn.
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Location:
melb
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 08:01
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are you gunna make it a power steer set up? if so rule out ke70 rack.
I think the rack length is critical as well as ratio - check you steering arm lengths.
length and paralism of suspension arms and steering rods must be equal I believe.
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Location:
Sydney
Registered:
April 2003
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 09:15
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Ok, i'm not sure if this is going to help at all but i know a group that actuly makes rack and pin conversion kits for valiants that just bolt on. I havent brought one myself but from the looks of it they have some sort of bracket made from welding together some square tubing and haveing mounts on the end that are bolted onto the chassis rails. Obviously you cant use this kit but maybe using the same principals as they would have spent time to figure out the best way to do this kit for the valiants. Again the best way for a valiant may not work be the best for a celica but it could be worth looking at how they do it.
Contact info and pics of the conversion stuff is on their website.
http://www.hemiperformance.com.au/
and you can get to the kit by clicking catalogue on the left then down to "Rack and Pin Con Kit" or use this link straight to it
http://hemi.customer.netspace.net.au/catalogue/rac kandpin.htm
I would love to see kits like this sold for the celicas. I have a TA22 that i would love to have Rack and Pin in.
Anyway, i hope this helps and sorry to take up space if it doesn't
david...
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Location:
adelaide
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 09:53
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Down with the sloppy ball..
Im also quite interested to know how this could be done..
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 10:27
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No intention of going for power steering. Heavy steering isn't really my concern, more the responsiveness of it.
Thanks for those websites, i'll check em out!
Cheers
Joel
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Location:
Brisbane
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 11:02
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I'd recommend NOT using P/S. The steering in my MA61 is just a touch too heavy without power assistance, but in an RA23/28 (much lighter front end and smaller tyres) I reckon it would be about perfect. Power assistance would make it way too light.
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I supported Toymods
Location:
Toodyay, WA
Registered:
July 2002
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Location:
melb
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 12:18
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I must be piss weak then.
In my AE86 I found the steering a little heavy at times - such as when parking and wanted to get it light like the ae82 twin cam that I was also driving which had p.s.
its a basic trade off isnt it - speed vs weight.
you could quicken it up to counter some of the lightness.
best of both worlds then.
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Location:
c'town, NSW
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 22:32
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joel, if you cant find a TA23 Xmember in the near future, for the sake of 'out of the car development' i might be able to offer some help...
i have a TT132 Xmember sitting idle under my house (just in case i need to do an emergency engine conversion  ). initial measurements tell me it is the same as a TA23 xmember.
anyways if we can confirm my xmember is the same as TA23, im willing to lend it to you to develop your R&P setup. Then once all done, u can either give it back to me or if u welded brackets to it, then when u do the engine swap i keep your existing TA23 Xmember.
dunno if i explained that clearly, but if your interested gimmie a yell.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 22:39
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Mate thanks for the generous offer. I'll do some hunting this weekend and if I cannot turn anything up, i'll take you up on that!
I can take some measurements from my TA23 xmember currently in the car to see if they are indeed identical.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 23:52
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My only qualm with the setup that Cam linked to is that the RA60/SA63 had rather different front suspension design. IE all the gemoetry is different (eg. struts at much bigger angles to the car). The KE70 however looks more similar to RA2* with the strut angles etc.
I don't know if that would make a big difference to adapting the steering rack or not?
Next question - could i use a 22R-E front sump on an 18R? Or am i going to be screwed 
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 04 September 2003 23:59
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Yeah i'd be a bit hesitant about changing the whole front end over. Would much prefer to be able to get some brackets welded to the crossmember and bolt the rack up to that. Then just get suitable tie rod ends and arms so all the right length and angles.
Good luck mate with the 22R sump, otherwise yeah you would be a bit screwed.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 00:00
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Hmmm celica spares are out of ta23 crossmembers
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 00:25
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Joel, check out an escort rack, not too hard to come by, are easily rebuildable, parts are relatively easy to get and you can get the quick rack ratio's for them. Make sure you get the shackles for them too.
The biggest problem I can see is getting the rack in the right location. You may have problems getting it high enough to avoid bump steer.
One other hidden benefit of the rack and pinion is that you can get rid of thoes damn idler and pitman arms.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 00:41
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Cool with checkout Escort rack too!
When working out what rack is most suitable for the conversion..
Are we mainly interested in something that is the correct width in regards so that the pivot points/inner tie rod ends are positioned around the same location as the pivot point for the control arms?
Isn't the aim to make the steering arms parallel to the control arms? If so, i'd imagine it would sit pretty low on the crossmember as the control arms bolt to the underside of the crossmember?
Or am I way off in my thinking here? Tell me if I am!
Thanks
Joel
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Location:
Terrigal
Registered:
May 2002
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 01:32
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Yup but you don't have a double wish bone front end. The principle is the same though. You are not quite right with the parallel theory but close.
Draw a line along the lower control arm and another one from the upper shock mount perpendicular to the strut. Where these two intersect is the "instant centre" you want the steering arm to be pointing at this point. If it doesn't then you will get bump steer. Only problem is that when you move the suspension the instant centre moves, so unless you have a parallel equal length double wishbone setup or the steering arm the same length and directly in line withthe lower control arm, at best you will get a good compromise.
I looked into all this when I was looking at making some roll centre adjusters, I will see if I can find the drawings and post them.
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Location:
Brisbane
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 02:03
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| TurboRA28 wrote on Fri, 05 September 2003 10:41 |
When working out what rack is most suitable for the conversion..
Are we mainly interested in something that is the correct width in regards so that the pivot points/inner tie rod ends are positioned around the same location as the pivot point for the control arms?
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Precisely. Another way to put it is the rack needs to come from a car where the control arm pivot points are the same distance apart as on an RA2x Celica.
One of these days I'll get off my arse and go to the wreckers with a measuring tape! It would be nice if an MA61 rack was suitable because I happen to have a spare one lying around... I have a feeling it will be too wide though.
| Quote: |
Isn't the aim to make the steering arms parallel to the control arms? If so, i'd imagine it would sit pretty low on the crossmember as the control arms bolt to the underside of the crossmember?
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On the MA61 the rack is mounted slightly lower than the crossmember so it's at about the same height as the control arm pivot points. You'd want to mount it the same way in the Celica.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 02:06
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I'll be at the wreckers either tomorrow or next Sunday with a tape measure!
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 02:55
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Yep, I've watched Wayne progress extremely slowly with his conversion, I actually sold him the motor and box. Wayne has been trying to replace steering componetry without modifying any thing, ie just bolt in mods. To this effect he has suffered horrendously with relocated wheels and I know he will have major bump steer issues, even though I haven't put my bump steer measure up to it yet.
A TT 132 crossmember won't fit in either, the bolt up spacing is larger, sorry!
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 03:07
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Probably worth looking for one that has the same thread size for the tie rods.
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Location:
c'town, NSW
Registered:
May 2002
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 04:12
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Haha biggest challenge so far is finding a TA23 xmember.
I could pull mine out or attempt doing it in the car but would be so much nicer not to have to pull it apart until the new one is ready to go.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 04:24
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There is (possibly WAS now) a TA23 crossmember at Pick a Part in Kilsyth Melbourne. I don't have the time, but maybe someone who has could get it. Apparently they are quite tricky to find.
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 04:30
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There was a TA22 there on wednesday but I think they are different to a TA23 crossmember.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 04:38
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Yeah the TA23 had the same body as the RA23 but with the T series engine so the sump is front mounted and not rear mounted like the 18Rs.
I brought my last one for $30 from Celica spares and they were plentiful then.. Seems the supply has dried up.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 05:20
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Anyone have a number for Pick A Part apart from the 1300 654 980?
As you cannot dial that number from Sydney get some stupid mesage.
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Location:
melb
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 05:23
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from my thinking the most critical length is for the control arm (lower arm) to be the exact same length as the tie rod length.
this means you can juggle the steering arm offset or rack length to get this.
the pivot points do not have to be on the same axis, if you look on your recirc ball syst you will see they are miles off (at least they are on my MX62).
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Location:
melb
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 06:57
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I think your not going to get very far with just the x member- youd be better off with the whole front cut.
theres going to be a lot of work adapting the column to the rack also.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 07:09
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Gianttomato - thats cool man, if you are there and no engine and you can pull it that'd be awesome! I'd put the money straight into your account. But if its all too hard.. Well it wasn't meant to be 
Chrisss, the TA23 xmember is only so I can construct off the car. All the other parts (rack, column, etc) will be coming from another car.
Cheers
Joel
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Location:
SYDNEY
Registered:
August 2003
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 09:19
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I was at pick and payless, blacktown Syd, on sunday. They have a ra23 in the toyo section, down the back near the cage. If your looking for a crossmember its there. Also it has an 18rgu motor in it pretty much complete. Maybe that would help you and others.
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Location:
eastern suburbs, Melb
Registered:
April 2003
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Re: Rack'n'Pinion ideas for RA28
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Fri, 05 September 2003 14:43
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Turbo RA28 can you tell me where you got that drawing from.
Thanks Damian.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Sun, 07 September 2003 07:56
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Joel, I was there today and unfortunately the TA23 is gone.
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Location:
PNG
Registered:
June 2002
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Re: Rack'n'Pinion ideas for RA28
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Sun, 07 September 2003 10:27
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I find all this a bit amazing. Dave, Toymods social secretary, has a ra23 with the conversion. Rather than all of the conjecture maybe Dave might like to give us a full and detail description of how it is all done.
Craig
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Sun, 07 September 2003 23:26
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Yeah is anyone in contact with Dave? I tried giving him a call but no answer (might have wrong number!) and don't see him on the forums much lately.
Gianttomato - thanks mate for checking the TA23 for me.. Bummer eh.
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Location:
PNG
Registered:
June 2002
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Re: Rack'n'Pinion ideas for RA28
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Mon, 15 September 2003 10:26
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Just going back over some old paper - if we could get the Administrater to go back to a thread I started on 20 February 2002 - www.toymods.qnix.com.au/viewthread.php?FID=4&T ID=3977. This will give quite a bit more info to everyone as it covers Jamie's car and Jonny2TG.
Craig
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Mon, 15 September 2003 11:24
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Lets hope it can get put back up!
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Mon, 15 September 2003 11:26
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I'm interested too! Was that on the old forums?
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Wed, 08 October 2003 01:15
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Just wanted to make this active again..
I'm a bit stuck as my steering box as crapped itself. Took it to get rebuilt and they said the worm and sector gears are stuffed and cannot get replacement ones.
Seems options are pay a gear company to make new gears (seems like big $$). Or get this rack n pinion conversion happening ASAP!
Does anyone know who I can speak to about it? I've tried Dave a few times but cannot get in contact with him. Anyone else out there who knows someone who has done it and can give first hand experience?
Thanks
Joel
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Location:
c'town, NSW
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Wed, 08 October 2003 02:25
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this prolly wont help at all but i was looking at a JZA70 rack at SSS last saturday as it was out on the floor attached to the Xmember and i was suprised at how short and thin it was.
i have no idea what the part is called but on either end of the rack (tie rod ends???) the part the attached itself to the steering components was about 1 foot long, im sure shorter one could be sourced and possibly used
otherwise considered checking out a gemini rack?
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Location:
On your mum!
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Wed, 08 October 2003 03:50
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Joel,
I have a rack out of a Laser (same as Mazda) It has shat itself but may be useful for measurements. You're welcome to it. Although me thinks that if a Toyota one does the job then it would be sacrilegious to use anything else!
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Location:
sydney
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 09 October 2003 09:32
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well have got r&p in my ta22. conversion was done when i bought the car and the guy didnt really know much about it but your welcome to have a look sometime iif you like.
scrote.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 09 October 2003 11:44
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Mate i'd love to have a look!
Where abouts do you live?
Cheers
Joel
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Location:
Canberra
Registered:
December 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 09 October 2003 23:24
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Joel can you get pictures and as many measurements as possible because theres a lot of people here who want to do this to their steering?
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Thu, 09 October 2003 23:32
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Yeah whatever I do with this conversion i'll take heaps of photos and write down all details. As like you say, if it works out heaps of people are going to want to do it.
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Location:
Cardiff, South Wales, UK
Registered:
October 2003
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Re: Rack'n'Pinion ideas for RA28
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Sun, 12 October 2003 20:14
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Hi all
Not sure how much help this is to everybody, but I have just finished a R&P conversion on my 1980 TA40 Celica, but could also apply to an earlier Celica.
Anyway here is the story and pictures so far.
Tatty 1980 TA40 + seized Rover V8 + too much beer = new project
3 years later I am just about there.
I had intended to use the original steering box, but a problem with most V8 conversions into a RH drive car is that the cylinder bank on the drivers side is the one which is set back and does not leave much room between the engine and the steering box (about 1 inch). This situation was worsened by the fact that Rover V8 has a rear sump, so the drag link sat where the sump was supposed to be.
After a few false starts using the original x member, I gave up and decided to design and fabricate my own x member which would allow me mount the engine, clear the sump (original 2TB x member curved back fouling the RV8 sump) and also allow me to mount a steering rack.
My only choice was to mount the steering rack in front of the stub axles, which caused a few headaches even finding a rack that steered the correct way.
Most racks I could find in the scrap yards go the other way (FWD mounted behind the stub axles I guess) kind of obvious when you think about it long enough. And a car that goes right, when you turn the wheel to the left is none too clever.
I finally found a manual steering rack from a Volvo 244 that was about the right width and had a sensible mounting system.. Actually mounting a rack is the easy bit, mounting it in the place you want it without compromising any of the parameters that affect how the steering behaves, safety etc is the tough bit.
Obviously starting with a new x-member that evolved as part of the steering helped but it is not easy to get right, and I am a design engineer!
Another problem of mounting the rack in front of the stub axles is that to acheieve the correct ackeraman angle does require new steering arms which have to be custom made not a cheap hobby. These arms also mean that the minimum size wheel I could fit was 15 as anything less would foul on the new arms as they angle in toward the wheel, unless you have some mad negative offset, Carlos Fandango wheels .
The arms in the photos are the temporary welded versions to work out the angles etc.
I also had to move the anti-roll bar and mount it below the suspension arms, but trust me that another story altogether
A quick introduction to some of the problems (bump steer, ackerman angle etc,) can be found here:
http://www.uk-hotrods.co.uk/technical/tech%20steer ing/steering.htm
The next headache was how to connect this rack to the steering column.
One area where I never take risks or short cuts is on a project like this, and this applies even more in areas like steering and suspension where one failure can really spoil your day. This kind of rules out cobbling together the UJ from a socket set, welded to a bit of old steel rod, gaffa taped to a curtain pole (apparantely it does happen!?)
I finally chose components from http://www.flaming-river.com/
I have to admit this stuff is expensive and I had to import it from the US, but it is worth it.
From the spline on the Volvo steering rack a UJ converts this to 0.75 DD shaft which runs through the first support bearing, this then connects to a double UJ (due to the angle) which connect to more 0.75 DD shaft supported with another bearing.
This shaft then runs up and through the bulkhead, roughly where the original steering rag joint came through. A 0.75 flange bearings is bolted to the other side of the bulkhead to support it. One final UJ connects this shaft to the original (but shortened) Celica steering column (luckily enough also 0.75 DD shaft). Add a fair few brackets and some other bits and pieces and that is all there is to it!
Oh and also chuck out the scrap yard rack used for the engineering/experimentation and go and buy a new one.
As with most things like this there is not always a definitive right or wrong way to do things, some ways are safer, some are cheaper, some look better etc. This is just the way I did mine and really was a bit of a nightmare but does work quite well, but I doubt it is approriate for most straight forward Celica R&P swaps.
I guess I should also say that these are not instructions on how to do this, but just a quick overview, and a million other little factors and problem have to be considered and calculated to make something like this work and be safe.
Anyway enjoy the pictures, and if anybody needs any further details specifically on the R&P steering or about the V8 conversion in general let me know I would be happy to help if I can or offer my sympathies if you are considering something similar.
Going through the all the photos of the project to find some suitable steering pics, it has struck me that nearly half of the pictures have a beer can in the background, so make sure you budget for a shed load of beer for a similar conversion.
Enjoy
GT
Cardiff
South Wales (the old one)
UK
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Location:
Canberra
Registered:
December 2002
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Re: Rack'n'Pinion ideas for RA28
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Sun, 12 October 2003 23:25
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Holy Crap 
Nice work on the Engineering
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Location:
Brisbane
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Sun, 12 October 2003 23:34
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Ditto. Very impressive!
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Rack'n'Pinion ideas for RA28
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Mon, 13 October 2003 03:00
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HORN!
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Rack'n'Pinion ideas for RA28
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Mon, 13 October 2003 03:14
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I bet you got half way through that and thought "what have I been smoking???"
Magnificent effort though. You probably spent more time and money on that rack than most people do for an entire engine/drive conversion.
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Location:
Terrigal
Registered:
May 2002
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Re: Rack'n'Pinion ideas for RA28
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Tue, 21 October 2003 09:29
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Well its all begun..
I took the crossmember out tonight and brgouth a KE70 crossmember & rack.
It appears the pivot points for the control arms on the KE70 xmember are 615mm apart.
The RA28 is 585 - 590 mm apart. So around 25 - 30mm difference in widths.
Do you think this is a concern? The KE70 rack was the smallest rack I could find out of Toyotas.
If that 25mm is a problem. I suppose the mounting points for the control arms on the xmember could be cut off and moved further outwards so it is identical to the KE70 diamentions.
I've started cutting up some metal that will be welded to the underside of the TA23 xmember so the rack mounts can be attached. I got some 2.5mm steel, do you all think that is strong enough?
Seeing I have the whole KE70 xmember, rack, control arms, steering knuckles etc I can take as many measurements as required. But not 100% sure where to start.
As stated above i've compared widths. But what else is important? The height the rack sits? How do you determine the optimal height? Should I make it the same as KE70 I suppose.
Where is a good place to take the height reference from. Is it the height between the ends of the rack(inner tie rod I suppose) and the control arm pivot points?
Cheers all
Joel
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Location:
Terrigal
Registered:
May 2002
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