LancasterBob
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| posted on 27/4/25 at 06:55 AM |
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Fury - measurement between rocker arm pivots?
Morning All,
Can anyone measure the distance between the L + R rocker pivots on a standard Fury please, with mk2 escort uprights and the fabricated rather than
tube-type rockers? I'm trying to reduce the camber as its always been excessive, but I run out of adjustment on both the lower ball joints into
the wishbones, and now also on the tie rod ends.
I've seen mention of some chassis being sold with x2 sets of rocker holes in the chassis mounts, inners for Sierra, outers for escort. Mine only
has one set, but I'm wondering if they are for sierra uprights + rockers?
All the best,
Rob
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adithorp
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| posted on 27/4/25 at 07:52 PM |
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I'll measure my Sierra upright one with tubular type rockers tomorrow. That might give you some clues. I though the 2 hole chassis were only
after tubular rockers came in.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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obfripper
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| posted on 27/4/25 at 10:00 PM |
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I don't know if this will apply to a fury, but my striker lower ball joints needed about 10-15mm of threads removing from new sherpa joints to
allow correct camber adjustment.
The standard length gives about 5° of camber when fully screwed in, which is far too much. When correctly shortened there are about 4 threads between
the locknut and balljoint when set to 1.5° camber (some spare adjustment but not much) , and approx 25-30mm engaged threads in the lower arm.
The fabricated upper rockers on a fury seem to be very close in design to the striker ones(at least early ones with chevette balljoints), the outboard
component is likely to be the same length to match up with the escort running gear, on my striker the upper pivots are approx 650mm apart, I would
expect yours to be similar.
Dave
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LancasterBob
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| posted on 28/4/25 at 04:53 AM |
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Thanks Adi, that would be really useful info to have. I'm assuming your chassis has x2 sets of holes, and your using the inners? If so, please
can you also measure the gap between the outer locations? Maybe the adoption of the Sierra upright went something like "Sierra with wider tyres
> Greater kingpin angle > upper ball joint further in > rocker pivot further in (maintains rocker ratio) > coilover more upright.
Thanks Dave, I started by trimming down the threaded end of the sherpa joint as you have so that I could wind them right in until the locknut was at
the outer limit of the thread, and it just about gets to a reasonable amount of camber, or at least way better than it was. Then when I refitted the
rack I found there wasn't enough engagement possible on the TREs. The steering arms will have moved in when I brought the bottom ball joints
towards centreline, which explains why I could set tracking before but not now. Measurement between my rocker locations at the moment is 630mm,
substantially less than yours, so it looks like moving the rockers outwards is the right path.
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adithorp
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| posted on 28/4/25 at 08:44 PM |
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Sorry, didn't get chance today. I'll try tomorrow.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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LancasterBob
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| posted on 29/4/25 at 08:10 PM |
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Thanks Adi, that would be great. Reasonably certain I'll be adding an outer set of drillings as it seems to solve all issues, it just makes sense
to keep them in line with a normal fury chassis.
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adithorp
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| posted on 2/5/25 at 08:25 AM |
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Finally remembered to measure it yesterday... then got distracted by a customer and remembered to post it today.
Distance between rocker pivots 630mm
If it helps rocke pivot to balljoint 190mm
That's on Sierra uprights with tubular rockers. I've only got the one set of rocker holes in the chassis. There is enough space on the
bracket for a wider set and I do recall seeing them with 2. My chassis is an IRS KitCar Workshop one so post Mark Fisher and pre-BGH.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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LancasterBob
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| posted on 6/5/25 at 02:27 PM |
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Thanks Adi, that's brilliant. I was away over the long weekend, just getting back on top of things. My current chassis was from Mark Fisher, and
only has one set of holes (at least for now), my earlier chassis was also from Mark I just can't recall how many sets of holes and what the
spacing was, and it's long gone now. I don't recall it ever having crazy amounts of camber at the front.
I'm going to keep trying to find a fury with the escort-derived uprights and the fabricated rockers, and try to get a definitive measurement.
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