ok, my brake conversion idea,ba/r33 mx83 to ra23/28 and ronas,

[IN 05 NT]

hey guys,

this has been stewing inside my little brain for the last few months,

without any trial so far, (yet to begin trial)

we have this r33/ba conversion in our mx83, and i think they are awsum, stoaked with the braking performance in such a heavy car,

what i have come up with, using the MX83 cressida struts (coilover conversion), with the 298mm x 28mm BA falcon rotors and r33 4 piston alloy calipers, plus the bonus of 5x114.3 stud pat and heavier duty sealed bearings

so the ball joint/steeting arm (ball joint part) are different,.....

as the celica/corona steering arm to strut bottom is only 2 bolts, and the MX83 cressida is a 3 bolt type,

so....what i have come up with its having custom RCA (roll centre adjusters) made as adapters from the 2 stud, to 3 stud patern,and and 30mm thick, (15mm thread for top/bottom threads) to able the cressy struts to bolt in....

now, im thinking, alloy would be easier and cheaper (most likey) to be made from, but as the alloy would need to be threaded....i dont think this would be strong enough ,
(as all the RCA ive seen are just spacers with longer bolts...)

steel, heavy, an harder to machine i assume, but threads would not be an issue,

do you guys think that this would be possible?

can you see any problems that i cant, I NEED AN OUTSIDER'S PERSPECTIVE....

as i see doing this as a 'kill 2 birds with one stone' idea, as you get the bonus of the RCA's as the adapter, instead of having to make custom caliper mounts for an old split hub design,

im hoping to get out to pickies tomoz to grab some struts

cheers, blake

[The Real Roadrunner]

id like to say that id back you on this one but there are too many probs with it.
1 an rca a real engineer would shoot you for.
2 steering geometry would no doubt be up the poo
3 strut inclination angle would be all wrong so you would have bugger all camber.

hmmm my head is hurting, too many hours working not enough sleeping.
cheers
linden

[IN 05 NT]

id like to say that id back you on this one but there are too many probs with it.
1 an rca a real engineer would shoot you for.
2 steering geometry would no doubt be up the poo
3 strut inclination angle would be all wrong so you would have bugger all camber.

hmmm my head is hurting, too many hours working not enough sleeping.
cheers
linden

engineering, not really a problem, as its pretty much a dedicated track car,

steering geometry,.... i cant see how it would be out?, if the strut/hub, sits in the same position,(except the rca) and still using the same balljoint/steering arm,

camber, adjustable strut tops, would help correct this, may not give crazy abouts of amber though...

this is what im thinking..... (thses are RCA camber adjusters to suit ae86) pics stolen from the for sale section (cheers )

[stevevp]

2 bolt to 3 bolt?

MX83 are 2 bolts to the bottom plate but spaced further

[IN 05 NT]

i swear the cressy was 3 bolt when i did it.....

done so many susp jobs i think im going crazy,

do you happen to have a link to that picture, website shop link thing.,,,?

+rep also!

[stevevp]

http://www.technotoytuning.com

they are good people - enjoy

[IN 05 NT]

would you happen to know if there prices are in AUS or US dollars?

cheers heaps, blake

[thechuckster]

just change the taper in the steering arm to suit the 23/28 ball joint - why fuck around with an offset RCA?

If it's anything like MA61 into RA23/28, the strut+kingpin angle will result in horrible amount of positive camber which you'll then have to fix with a different LCA and adjustable strut top.

[The Real Roadrunner]

engineering, not really a problem, as its pretty much a dedicated track car,

steering geometry,.... i cant see how it would be out?, if the strut/hub, sits in the same position,(except the rca) and still using the same balljoint/steering arm,

camber, adjustable strut tops, would help correct this, may not give crazy abouts of amber though...

give me a week or two and ill show you a much nicer way to get the desired braking your after fo reasonable dollars.
actually if you want 290+mm rotors i could show you in a day.
cheers
linden

[Norbie]

I put MX83 struts in my MA61 but I kept the MX83 steering arm and ball joint. Camber was all wrong but I had the struts bent and it's all good now. From memory the RA23/28 has the same ball joint as the MA61 so you could do the same thing I guess.

Details here.

[IN 05 NT]

I put MX83 struts in my MA61 but I kept the MX83 steering arm and ball joint. Camber was all wrong but I had the struts bent and it's all good now. From memory the RA23/28 has the same ball joint as the MA61 so you could do the same thing I guess.

Details here.

nice work norbie,

by using your adjustable strut tops, you couldnt correct the camber enough to over come the positive?

im not too fussed about wheel inside the guard issue either, as i will be running flares soon also,

also thinking of having the lower control arms modified to alow even more camber adjustment,

(this car is pretty much going to be track dedicated, so legalities dont apply)

[Norbie]

Strut tops might have got it back to zero degrees but that wasn't enough for me. Note in an RA23/28 there's an even bigger difference in kingpin angle so more bending will be required (maybe 4 degrees).

[IN 05 NT]

kk, so i will definately have to have the LCA's modified to be adjustable to over come the kingpin angle!.....

i'm still interested to see what you come up with linden,

[WDE_BDY]

The other relevant question is how long are the steering arms from the MX83? You could end up with slow steering and no lock if the are too long.

Callum

[Norbie]

As you can see here the MX83 steering arms are quite a bit shorter than MA61 arms. My guess would be RA2x arms are longer than MA61 (no power assistance) but I haven't measured them.