Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) Who's was this ARP4 ?

I love my mine and when not thrashing it I find it drives very comfortably at low revs. However I can't get the manual steering set up right so I going back to basics can anyone tell me the torque settings for the two piece wheels? Anyone any other suspension/steering settings they can recommend ?
Thanks John

Torque settings for the wheels?
You mean for the wheel nuts? If so 65lbft

Suspension settings
6 degrees Caster (check it, don't assume it's right from the factory)
0.5 to 0.75 degrees negative Camber
3 mm toe in (1/8") or about 20 mins included
Try about 23ish psi in the tyres
Check there's nothing binding in the steering as well, I've seen sticky UJ's and steering racks before

Simon @ SiFab.co.uk

Thanks Simon just the response I needed. The wheels are two piece just wondered if these bolts had a torque setting ...?
Best regards
John

Bolts around the circumference?
about 12-15 Nm or 8-11 lbft

Periodically checking them is a good idea as I have known them to come loose

You don't want to think about the consequences of a sudden loss of tyre pressure from a loose rim bolt/s at speed...

Simon @ SiFab.co.uk

Cheers you're right !

The power steering on My ARP4 was superb but the Roaster is not as good .I find it vague and ponderous with little self centering.
The AR must have had a quick rack like my P4SS so i'm finding the Roadster not so positive.
I'm going to have the geometry checked when I have a few ore miles on the clock, there are only 1500 at the moment and it may have a tight kingpin.
I am so happy with what Morgan did to make the car look the same as the AR but without any of the problems I just love it ..well its just a bit quiet but that's for next year.
Thanks for the data Simon.

I would certainly agree that the power steering on the ARp4 is spot on, in fact at no time would you even think it is powered, it is not too light and with just the right amount of assistance when parking. Not having driven the Roadster, I am happy to accept Peters feelings on it.

Talking of more noise leads me into the ARp4 exhaust system, which seemed to have given Morgan a lot of trouble in development. Does anyone know what the difficulties were? Simon, you have your ear close to the ground on these things?

Hi,

I may be something of an oddity in that I had unassisted steering on my ARP4 initially, then power steering retrofitted (it's a long story...).

In my view, for what it's worth, the car was a better 'drivers car' with the unassisted steering and I had more confidence in the chassis with the feel and feedback that the unassisted steering offered.

However, the powered steering makes the car a lot more usable day to day and is great when touring around at normal road speeds. I'd take the power steering 90% of the time, and the unassisted to see what the chassis is really capable of!

If you have power steering, as I do, should you wish to go from power to unnasisted, for a track day for example, just take the fuse out. As it's electric and not hydraulic this is a quick and free mod.
The benefits or otherwise of power steering and how Morgan have engineered it, and it has changed over the last two years, is a much broader subject. What I can say is that the Roadster and P4/ARP4 are not the same, according to Morgan.

That's a very good suggestion, I might try it. Wouldn't it make the steering a little heavier by virtue of having to turn the electric motor and associated gearing?