EPAS and castor problems. steering quite unpredictable

[bloke]

tried the rack on it's own? pop ends off the hubs and the bottom uj and see what it feels like.

 

[RuskiWeldFab]

Ilya, have you checked there's no slack in the DCi rack? My Epas has been absolutely spot on. No problem returning to centre. But I'm running with a looped HPAS rack at the moment. Still haven't fitted my DCi rack.

I have. There is no play as far as I can tell. (Wiggling wheel lock to lock.)


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[RuskiWeldFab]

tried the rack on it's own? pop ends off the hubs and the bottom uj and see what it feels like.

Didn’t go that far yet. Really don’t want to undo suspension components as it’s been fully set up. I guess I am gonna have to if I wanna get to the bottom of it


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[robzracing]

I have. There is no play as far as I can tell. (Wiggling wheel lock to lock.)


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So, with the car on the ground the wheels start to move as soon as you start to move the steering wheel?

 

[bloke]

you've only got to pop the ends off the hubs, geometry will be fine.

 

[RuskiWeldFab]

you've only got to pop the ends off the hubs, geometry will be fine.

Suppose you right. Will do tommorow.
There is tension screw on the rack itself. Right at bottom. When I was rebuilding the rack, I might have tightened it a bit to much. I tried today to adjust it. Screwed all the way in and was almost imposible to turn wheels side to side by hand. Than I unscrewed it out and it became much much lighter. So adjusted it to somewhere in the middle. Wondering if this been having negative effect as well?


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[bloke]

should get an idea when you try the rack on it's own.

 

[CamMoreRon]

Good news is that it does indeed separate (at least the non EPAs) the question remains, which way do I rotate? Hmm

Good stuff! Which way to rotate it.. well that's not an answer I can really give you without being there looking at it! BUT.. if you follow the setup in my long post that should hopefully be enough to guide you. The three pics show what you're looking to get to.

 

[RuskiWeldFab]

Good stuff! Which way to rotate it.. well that's not an answer I can really give you without being there looking at it! BUT.. if you follow the setup in my long post that should hopefully be enough to guide you. The three pics show what you're looking to get to.

The main problem is the lover UJ. It almost has no angle in it. Hard to see. But I guess it’s a 50/50 chance I go the right way haha. Will try do 3-4 notches see what it does. Thank buddy!


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[CamMoreRon]

First things first, start by getting the handwheel and the rack centralised.

Then fit the upper UJ in-plane with the EPAS motor output and the intermediate shaft as per the pics I sent.

Then fit the lower UJ in-plane with the inter shaft and the rack input as per the pics - I appreciate this could be tricky due to the shallow angle!

That should at least get your steering response symmetrical left to right, but fingers crossed it sorts the dead on-centre feel out for you too!

 

[bozothenutter]

any more news on this? @pule333

 

[RuskiWeldFab]

Yes and no
Checked the rack no play at all!
Moved the UJ by 1 spline. It’s a b**ch to adjust so not gonna bother.
It’s absolutely fine on the track. I am happy with it. On the road its wierd. But than again, I don’t drive it daily. It’s not gonna bother me. Increasing castor fixed the issue 90%. The rest.. well f**k it! #becauseracecar


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[scullyg40]

Ditch the EPAS, stick your original column back in, and drive it with the DCI rack, full non assitsted. ?

 

[RuskiWeldFab]

Ditch the EPAS, stick your original column back in, and drive it with the DCI rack, full non assitsted. [emoji6]

I have it off on track occasionally. But I am a big girl and need assistance at slow speeds ?


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