fraser9764

iTrader: (3)

So whats wrong here then?





have I got a 4x4 arb? I can't see any markings on it.
It seems to have loads of caster. Its a bit odd as I used to run the same arb on my old car with spacers behind the tca to increase the castor.
The only difference is the tcas on the old car were standard and used floflex bushes where this is using powerflex black series, also the crossmember which is a base model one, I couldnt see any difference between the cos and base model cross members but I did have to drill the holes out to 12mm to get the bolts in for the inner rose joint

I had to use a ratchet strap to pull the rose joint end back to get it together as the bushes are so stiff, when I tried one of the old ones with the floflex bushes I could put it together easily by hand and it looked ok but the bushes were quite twisted..

Cossy Mike

iTrader: (4)

You have 2wd cross member......4wd is different, then you wouldn't need to drill the holes bigger.

I've got a pair of adjustable arms and was about to do this very same job but let down by wheel bearings so will have to wait.

fraser9764

iTrader: (3)

Yes the cross member is from a base model 2wd
Im wondering if the arb is from a 4wd as I read somewhere that these give more castor.

Cossy Mike

iTrader: (4)

Looks like a 4wd arb in the pics

Cossy Mike

iTrader: (4)

You'll need a 2wd arb to make it work. If you temp align the wheel up, you'll see it sits way further forward in the arch

fraser9764

iTrader: (3)

i ran the same arb on my old car and even ran spacers behind the arb/tca bush to add more castor! it drove well but the wheel was nearly touching the front bumper/splitter.
Can anyone confirm it is a 4x4 arb before i buy another 2wd one? Cheers.

dojj

iTrader: (3)

i would agree that the arb would seem to be the 4wd one

without putting them on top of one another though it's very difficult to spot the difference by eye alone, the 4wd ones from memory pokes out at a different angle and it slightly wider than the 2wd one, but it may be the other way around

fraser9764

iTrader: (3)

ok i will try to source a 2wd one tomorrow. Cheers.

slammedorion

Bummer... Always something...

dojj

iTrader: (3)

reading that bit would almost certainly make it a 4wd bar you've got

i put a 2wd bar onto my 4wd sierra and the handling was amazing, but the straight line normal driving was always on the edge, almost like it was fitted with an f1 steering rack

i ditched it after about 3 weeks of proper nervousness, but going round corners it was stuck to the road like shit to a blanket

fraser9764

iTrader: (3)

oh well, at least when i put it back together it should drive better, thats a couple of things ive found that were wrong suspension wise. Quite looking forward to driving it again with everything as they should be

Rob Virgo

iTrader: (6)

Bars are marked h12 and h14 or something similar, if I get the chance I'll check my 4x4 bar I tried to fit to project trackshed (2wd)....

dojj

iTrader: (3)

think those numbers referred to the torsionally strength of the metal they were made from

Ridgey

iTrader: (5)

Graham
Have you found a ARB ?
Thought your front wheels were always way forward before

fraser9764

iTrader: (3)

Yep ive ordered one from Gary@RSClassics should be here this week.

dojj

iTrader: (3)

You are the se ond bloke with 4wd 2wd cobundrums this weekdixie the kid has a simikar pribkem on hus motir so mught be worth checking out his thread fir sime pitential criss informationing between everyine

DixieTheKid

iTrader: (2)

Yes have the same prob. 2wd arb didn't work for me, I've also tried a Granada cosworth 28mm. However a 26mm std pinto arb works fine, still a little bit forward but as much. I'm going to have my 2wd cossie one machined back about 15mm each side.

Marc sierra

iTrader: (1)

I have Always wondered whether the 2wd sapph cossie arb is the same as a 28mm arb from a standard sapph. At least they are both 28 mm thick. I have a standard 28 mm arb on my sapph and I have no issues with the wheels being too far forward. In fact I added washers to push the wheels more forward to increase caster.

A Granada Cosworth arb will give the same caster setting as the 28 mm standard sapph arb does. The only difference for the Granada Cosworth arb is that it is a little wider due to the longer tcas on the Granada and that it's 29 mm thick instead of 28 mm.

fraser9764

iTrader: (3)

I will see how it looks when the 2wd one arrives.
Are the cross members definalty the same? They didnt use a slightly different cross member with the tca mount moved slightly forward on the cosworth?
If it still isnt right I might ask Ridgey if I can take some measurements off his car to compare.

dojj

iTrader: (3)

the 2wd ones are all the same, as are the 4wd ones

what might be worth checking is the distance from the front of the chassis rails to the bolt holes on a 2wd and 4wd car to see if these are the same too, which they should be

Ridgey

iTrader: (5)

Graham, I should be fitting my 3dr hubs and new adj tcas this week, picking the car up from the body shop tomorrow (tue).
I fitted the EsCos rear ARB, it just misses the diff mount

fraser9764

iTrader: (3)

So i received my 2wd Saph ARB today,
Offered up against the original... not much difference? not as much as i was expecting anyway






it is a little bit shorter, but not much difference in the angle.

So i thought i would see how it looked on the car



a bit better...

Popped the hub and shock on, and a brake disc and old wheel to see how it sat in the arch





its still forward in the arch but not excessive.

from what i have read, the H12 original 3dr arb, was replaced with the h14 which gave a little extra castor to improve stability. Does anyone know where these marking are as i can't see any on either of mine?
I'm wondering if i have gone from a H14 to a h12, and i have another problem somewhere?
Not that it matters too much anyway, i will measure the castor as soon as it is down on all 4 wheels and see if it is within spec for a standard saph cosworth.

Ridgey

iTrader: (5)

Looks fine now

dojj

iTrader: (3)

so it's virtually what i said then

when you get it onto the ground the lower it will be the further forward into the arch the wheels will go because the length of the physics is fixed so you will arc forward the lower it goes

comp struts will allow you to move the wheel backwards and a front mounts arb will leave you with the ability to run softer springs

but it is lots of overkill if you are going racing