when i got my bushes i did as james did, cept i got the brackets as well so it all fits.
Hi,
I am looking for help (as always) with my wishbones and bushes. I really have two questions;
1. What is the easiest steel stock to get that has a bore suitable for a standard bush (i.e. cheap bush)?
2. What is the recommended type of bush? I have seen various types i.e. metalastic, poly etc
I have access to a lathe so boring a tube out is not really a problem, if i can get a standard sized tube that works so much the better. Also, how
much should i expect to pay for the bushes and where from?
I have probably asked too many questions for one posting but if you can advise on any of the questions then fine.
Cheers
PS: maybe one day i will be able to answer questions, rather than ask them!!
With your access to a lathe, you could make up your own bushes out of stock nylon to suit the size of your tube, It is very cheap and you can buy it by the metre
Hi,
If you decide to use Nylon then don't use it for the trailing arms or panhard rod as it does not "give" enough and may cause a stress
fracture of these components due to its resistance to twisting movements. I have Nylon bushes in my front wishbones which are fine although I would
prefer in hindsight to have PolyU bushes.
GTS Tuning do polyurethane bushes at www.gtstuning.co.uk
You can also get them from other vendors such as Luego, MK Engineering, Stuart Taylor etc.
Cheers,
Craig.
So basically what you are saying Craig is, dont use nylon at all? Have you got any constructive solutions?
When you say that you wouldnt use nylon for your front bushes, why not? i.e. cost, performance, quality...........
Are GTS the cheapest then? polyurethane the way to go then?
Every answer creates a dozen more questions!!
If you dont know you have to ask.
If you want some compliance in your bushes, use shore 70 (or softer) PU (polyurethane) hollow bar.
If you want rigid bushes, use acetal hollow bar or rod (in preference to Nylon). It's a true self lubricating plastic, and can even be ordered
impregnated with teflon and or graphite. It also machines a lot nicer than Nylon. It's basically superceded Nylon for use in bushes.
I matched Luego bushes to locally sourced bush tube.
Luego PU bushes fit a standard size seamed tube, and the quality of the bushes is good.
You may wish to consider buying prepared bush tubes as they are not too expensive and will save a lot of time hacksawing / turning.
Mick
I bought the bushes, the inner crush tubes and the outer bush tube all from MK- that way I could garantee they were all going to fit!
HTH,
James
Beat me to it Albertz I was going to ask the same question.
Want to replace the book metalastics with nylon or summat else and a guy I know with a lathe owes me a favour.
So what tube sizes do MK bushes fit just as a matter of interest.
Cheers,
Bob
quote:
Originally posted by splitrivet
So what tube sizes do MK bushes fit just as a matter of interest.
Cheers,
Bob
Hi,
If you look on my www.gtstuning.co.uk website at the polybushes, and download the attached PDF file, it shows you all the sizes and tube requirements
to fit them.
I also now have some laser cut plates that accept maxi ball joints so you can easily make lower wishbones. Basically you just lay the tube down the
side of plate and weld to it, to achieve a strong and attractive wishbone.
Kind regards,
Darren
thats a good addition darren. mine are a mess.
when i got my bushes i did as james did, cept i got the brackets as well so it all fits.
Hey Darren, what does the 36 pc poly bush set comprise of?
Just bushes or tubes too?
Cheers,
Alan
Albertz,
Yes you are correct, I would NOT recommend nylon even though I am using them for now on the front of my car. It's amazing how much you learn as
you go along... I will replace them one day!
PolyU seems the most popular by far and there are many threads on the forum which will debate the ins and outs, I'm not going to repeat them all
here. Nylon is too hard for comfort and I don't think it is self lubricating so maintenance is required. The main disadvantage is for the rear
suspension where if you are using a live axle or de-dion setup then it doesn't permit the twisting movement which is required in the trailing
arms and panhard rod. I am using rod-ends on the back of my Locost which will make it shake my fillings loose but will be very tight. I think most
people agree that PolyU all round is the best solution and isn't expensive. That's what I'll use next time...
Cheers,
Craig.
I bought the bushes, crush tubes and sleeves from lolocost, they were cheap, but then that shows in the quality. Next time it'll be decent quality ones from MK or GTS
My poly bush kit includes, all the bush halves and the insert tubes as well. I have noticed recently that MK charge about £10 more for just the poly
bush halves, and then charge double the cost for the nuts and bolts than mine but include the inserts in there.
If you buy from MK i believe, bushes and nuts/bolts cost you all up over £80 where as my total would be less than £60.
I'm thinking of doing a comparison table with MK and Luego, because people would be shocked i think on how much more they charge than i do, it
shocked me. I think they have both recently put their prices up, as i originally looked at both in order to find out how much i should charge for each
part.
If i charged Mk rate for Sierra upright mushrooms, i'd make about 700% profit margin on them, Martin must be doing rather well at the moment.
Kind regards,
Darren
Darren
The pdf of the bushes states either 40 or 46mm overal width (depending on brackets used. however on the drawing it states 1 Required tube size=
1.25' x 18swg x 30.6/36.6 long.
I assume the lengths are wrong?
Cheers
I must admit that I found this unclear myself but just thought I was being thick! 
Also, is 18swg tubing heavy enough for wishbone mountings? I would have expected it to be 2-3mm. Again I may be reading it wrongly.
Cheers,
Craig.
It will be a misprint: 18swg is only 1.24mm (.049"
! I'm sure it's supposed to be 13 swg which is 2.41mm (.095".
I've seen wishbones pulled off bush tubes that were 1.6mm wall. Not nice!
I normally use 2.1mm (.083" wall CDS.
quote:
Originally posted by Rorty
If you want some compliance in your bushes, use shore 70 (or softer) PU (polyurethane) hollow bar.
If you want rigid bushes, use acetal hollow bar or rod (in preference to Nylon).
The shore number is a hardness measurement for this kind of material...
Acetal is often known under the brand name of "Delrin".....and maybe others...
quote:
Originally posted by Hornet
Darren
The pdf of the bushes states either 40 or 46mm overal width (depending on brackets used. however on the drawing it states 1 Required tube size= 1.25' x 18swg x 30.6/36.6 long.
I assume the lengths are wrong?
Cheers
Hi All,
Sorry to take so long to post a reply.
The drawing might be a little confusing as regards the tube length. Really this was as a guide to those making the wishbones. The tube length referred
to by this dimension is the wishbone eyelet itself not the crush tube. The crush tube is nominally the same as the bracket width, ie. 40 or 46mm, and
working back you get the wishbone eyelet tube width.
Kind regards,
Darren
quote:
Originally posted by dozracing
The tube length referred to by this dimension is the wishbone eyelet itself not the crush tube. The crush tube is nominally the same as the bracket width, ie. 40 or 46mm, and working back you get the wishbone eyelet tube width.
quote:
Originally posted by Alan B
The shore number is a hardness measurement for this kind of material...
Acetal is often known under the brand name of "Delrin".....and maybe others...
quote:
Originally posted by jcduroc
Excuse my ignorance but what does "shore 70" mean? And which material is "acetal"?
quote:
Originally posted by jcduroc
And which is the OD of the bushes inner part?
Joćo