bx modifications
 

hi every body with a bx, most top drivers are running this mod now and the car is transformed it gives more camber out of the corners for more rear traction. the steeing mod is my idea and i like to run because i dont like fast steering, it also calms the front end down dramatically.

The upside down rear ballstuds i did not yet no of at southport but at tiverton (outdoor) it made a lot of differnce for rear traction i got a old xxx4 front shocktower and made the spacers to rise up the rear top deck it has to go right across to keep the diff held in, you also have to file away some of the top deck at the edge so when the car lands of the jump the turnbuckles stay onand arn't pushed of.Another think i have also found with the bx is that it always wanted to flip, after looking at the steering assembely i decided to do is was the same as what everyone did to the xxx4 , make the turnbuckle from the servo longer to make the steering smother and stop it diggig in so hard. firstly i removed the carbon joint out and placed a old turnbuckle from the servo to the other side of the car, at this point only one wheel will steer so look at the ackermann at the top, with the spare hole nearest the pivot use the turnbuckle previously taken of at fit it across (must make longer) it misses all the belts and the diff.

i know this may sound confusing but its not look at this link for a oople shot of simon moss with the modified bx.
http://www.oople.com/rc/photos/batle...tley4wd59.html

ryan

Hello Ryan,

Have you got a shot of your steering modification plz ?

Thx

Bast

steering
 

i have no digital camera at the moment but i will borrow someones camera and post it next week some time, sorry!!!:(
ryan

This is the reversed links on lee martins car at oswestry

http://www.oople.com/rc/photos/oswes...es/os4wd43.jpg

mods
 

thats the one!! i raised mine up further about 4mm by extra spacers.
ryan

http://www.oople.com/rc/photos/oswestry160706/imagepages/os4wd02.html

I also spotted that there are different rear drive shaft’s being used on the BX in that photo above, I always spot little things.

For example what’s going on with the rear brace on this BX? Looks like screws have been reversed from being fixed through the chassis bottom to down from the top… not sure why you would make this modification however, anyone know?

cant see drive shafts ??
and i think bits on top of rear link are something to do with the rear plate covering the diff

he means the photo in the thread carl (I wondered the same at first) I guess they might be B4 cvd's ?

I meant in the photo in the post above (I wasn't very clear), the one Jimmy posted, B4 rear drive shafts not the Yoke one's. Think I'll stick with the BX one's until they need replacing.

You think they might be B4 CVD's, rear uprights (after market - poss different toe) and wheels by any chance? :cool:

G

I think I heard that one Yoke driver (quite well known) had said that B4 rear driveshafts was the single biggest improvement he had made! :o

G

Hi,

Does it require any modification to use them on the BX? And what about the front ones?

Thanks!

driveshafts
 

they run the b4 driveshafts becuase the roll pin always come un-done and the pin falls out this has happend to me twice, check it every run and take it out and re-threadlock it after every meeting do not use the threadlock in the kit use the top brand stuff. the hubs he is runing is rayspeed 0.5 degree dont no what it does though!!

ryan

Don't know, I don't run one, sorry.

G

CVD's also handle different to dogbones. I think they give the rear more grip on power. The 1/2 degree hubs will add grip or take it away depending on which way round they are.

Does the BX struggle for rear grip? :confused:

G

would imagine that if the BX is anything like the BC was it won't struggle for rear end grip. the japanise like alot of rear grip (lots and lots) mainly due to them running on low grip clay (yatabe) and as the car didn't seem to have any probs with rear control at the worlds i would imagine that any change to the rear end hubs would be the same as the cahnges made to the BC, which was to take away rear grip so reduceing the amount of rear toe.
am also interested to know if this car sufers any of the traits that the BC had like requiring more rear end damping to stop that nasty side bite issue which would cause the car to suddenly flip.

From what I heard, the CVD shafts lock up a bit more than the UJ shafts, and keep the car flatter under power because they try to straighten up - or something.

I would have thought UJ's would bind more on power. They started using them on the back of the XXX to get more steering.

G

more bind = more rear end on power.

what happens is, they level out the car and make it drive 'straight'

with the less bind, it allows the car to keep leaning in the corner and continues in the corner when you get on the power.

off power its the oposite, more bind = less rear end entering the corner.

at least thats what happens on the back of the Losi car(s)

yea forget that, I meant over dogbones not UJ's - I got confused :D

rear grip
 

the bx used to struggle for rear end grip dramaticaly (i cant spell!) after turning the ballstuds upside down its awesome. i am going to keep it to yokomo parts i think.:rolleyes:

sounds like there wasn't enough camber change on the rear to keep the tyre flat, mid corner it was probably rolling off the outer edge of the tyre.

Who's the daddy? :confused: :D

G

????:o

thats very strange, as it was designed to run on dirt not grass, never the less it is easier to get grip than loose it (at least thats the experience i had with the BC)
i'll get one of these one day and find out for myself.

Bathys BX oversteers massively, three rows off the tyres and still couldn't correct it. Seems that most of the ones i saw go round had a tendancy to oversteer and kick the rear end out.

steering
 

not if you do my steering mod!!!
ryan

Ryan ,

Put a shot of your steering mod plz.
It's to much interesting.:)

Somebody go to the European championship at Vienna ?
There is carpet, at the warmup, on the straight, the big corner on the left, on the four jumps, on the table ...and on the 360° corner ( halfpipe :) )
Is the rear end mod great for this track ?

thx

bx
 

hi bastos,
the first time i used the steering mod was on a tight twisty carpet track and it didnt grip roll once; i use the steering mod on all tracks even if low grip as it kicks the rear end out and on high grip tracks like astroturf it stops it digging in, also have the front end ride height higher than the rear so the weight is at the back and stops digging in so much. The rear end mod (ball studs upside down) i use on any track or any surface to stop the rear end powersliding. When i used the bx at oswesrty where there was a big table top the bx stuggled to fly (lol its not a plane!!) probarly becuase i got the fattest batteries ever (peak 4300) try some harder springs on the front to push the front end of the jump. Most people are running associated shocks now but i found the yokomo shocks just as good i also had to put limiters in the rear shock to stop the drive shaft falling out. i do want to try it with associated b4 rear hubs and associated drive shafts for even more rear end grip. i have not found my camera yet so no photos of the steering, i will pm you some better instructions.
hope this helps!!!!
ryan

Ryan,

Post them also on the site, please! ;)

Cheeeeers!

Ryan,

For the yokomo shocks, if you think they are better ( that's I think ) try to find this yokomo reference ( long shocks shaft 49,6mm ) : YS-5L-2T
to have the same lenght as asso shocks.( Use "BRADDERS" rear shock tower :D )
For the rear hub, I've win a french nats on slippery tracks with rayspeed rear hub 0,5° and original rear hub ( to have classic 3° toe in or more) and with CVDs Dogbones...its right that the cvds give something more ( traction out of corner ).
Gallery here : http://www.mini-zone.com/plugins/dia...fr&diapo_id=27

See my yokomo ( the yellow one )

Thx for your help

YOKOMO better than before


( I still wait the shot of ur steer mod :D )

The U.K. rear mod is interesting, but, perhaps there is something more simple.`
Take a look on your front hub carrier...you can set the wheel base, long or short, I think you can modified the arms to make the wheelbase more shorter.( just to put two spacers on the front of hub )
By this, the steering is totaly different and the rear end don't go out during corner and the front end is smoother...good for slippery tracks.

:santa:

bx
 

i have two of the "bradders" shock towers that i used with the associated shocks, it is higher than standard. what is the advantage of using long shock shaft and the "bradders" shocktower does it give the car more droop? if it does the driveshaft will fall out with the rear end mod so do you have to run rayspeed hubs and b4 driveshafts? i tryed the front hub spacing and still found it digging in to much so i always run the upside down ballstud it transformsthe car to a 4wd beast!!! do you run the rear end mod? you must be pretty good if you won th efrench national i dont think i can compare my self to you!!!

ryan

Sorry, what is this exactly? :scratch: :-D

bradders shock tower
 

the bradders shock tower is a modified version that has some thing to do with neil cragg and paul bradby/bradders it is higher than standard so you can run associated shocks or longer shock shafts, you can buy them of him for about £15. i have a spare one brand new that you could buy from me for £15 + p&p i can not make any chaeper as thats what i payed it does not come in a packet as i brought it of mike bradby.(pauls dad)
ryan

Thanks Ryan.

How to contact them please? Are they on this forum? :D


Cheeeeerrrs.....

Because I got it from paul bradby

rear shocktower
 

i dont think they are on this forum but neil/mick cragg use www.doughtyuk.net send " neilcragg" a personal message he can help you better than me.
ryan

BASTOS:
have you tried the setup i posted? did you win any more nationals?

1) Yes it's losi ones, drilled for the original ball stud
2) I use top hole of the tensioner
3)For the PT, I never have problem, but 2/3% of detection, be carefull.
Perhaps just behind the motor.
4)For the cover, I use small screw from associated/ losi generaly use for fixing the front wing.