Forums34
Topics48,340
Posts812,974
Members9,203
|
Most Online1,046 Aug 24th, 2023
|
|
|
Joined: Jun 2016
Posts: 430
Learner Plates Off!
|
OP
Learner Plates Off!
Joined: Jun 2016
Posts: 430 |
|
|
|
|
Joined: Feb 2019
Posts: 3,854 Likes: 2
Talk Morgan Addict
|
Talk Morgan Addict
Joined: Feb 2019
Posts: 3,854 Likes: 2 |
i wonder why the swirls on the inside of the covers?
The light at the end of the tunnel is actually a train. 2019 M3W
|
|
|
|
Joined: Sep 2019
Posts: 280 Likes: 19
Learner Plates Off!
|
Learner Plates Off!
Joined: Sep 2019
Posts: 280 Likes: 19 |
Think they were circa £300 last year/year before via another seller - same 7 sets...along with the Hesketh Cam chest covers. (edit - just noticed the email address given - the cam chest covers were sold by a bike breakers)
They do look nicely different in black, but only the bare ones are available on ebay. (were but it now seems they are no longer available?)
Last edited by Stevo666; 09/02/22 08:09 PM. Reason: added info
|
|
|
|
Joined: Feb 2016
Posts: 7,920 Likes: 216
Talk Morgan Guru
|
Talk Morgan Guru
Joined: Feb 2016
Posts: 7,920 Likes: 216 |
i wonder why the swirls on the inside of the covers?
To create a vortex driven by the movement of the cam belt. This in turn expunging the belt dust and so increasing belt life. I could be wrong though 
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
|
|
|
|
Joined: Jun 2016
Posts: 430
Learner Plates Off!
|
OP
Learner Plates Off!
Joined: Jun 2016
Posts: 430 |
i wonder why the swirls on the inside of the covers?
I'd suppose for some minor additional surface area for oil cooling transfer, and because with a CNC and CAD, it's easy to do :-)
Last edited by truckin-on; 09/02/22 08:45 PM.
|
|
|
|
Joined: Jun 2021
Posts: 1,779 Likes: 52
Talk Morgan Enthusiast
|
Talk Morgan Enthusiast
Joined: Jun 2021
Posts: 1,779 Likes: 52 |
Whatever the (technical) answer is, they look wonderful. Just promise you won't pop-rivet on some "Morgan" plaques, which appears to have been done to this Aero Supersport which has been for sale for ages for some reason(s).... ![[Linked Image]](https://www.tm-img.com/images/2022/02/09/Morgan-Aero-4.8-Supersport-rocker-cover.jpg)
Peter 2009 3-litre Roadster "Ivor", royal ivory / green
|
|
|
|
Joined: May 2015
Posts: 1,773 Likes: 19
Talk Morgan Enthusiast
|
Talk Morgan Enthusiast
Joined: May 2015
Posts: 1,773 Likes: 19 |
i wonder why the swirls on the inside of the covers?
To create a vortex driven by the movement of the cam belt. This in turn expunging the belt dust and so increasing belt life. I could be wrong though  If your cambelt is in the rocker covers I think you will find you have other problems 
M3W5sp 2015, MSCC, MTWC, Oxon UK
|
|
|
|
Joined: Nov 2011
Posts: 374 Likes: 2
Learner Plates Off!
|
Learner Plates Off!
Joined: Nov 2011
Posts: 374 Likes: 2 |
The "swirls", are tool path marks replicating the cnc program
|
|
|
|
Joined: Feb 2019
Posts: 3,854 Likes: 2
Talk Morgan Addict
|
Talk Morgan Addict
Joined: Feb 2019
Posts: 3,854 Likes: 2 |
The "swirls", are tool path marks replicating the cnc program a nice big, deep, spiral cut. Engine turned marks on the mating surface look good and serve a function but the concentric spiral is still a mystery to me. They look like cast into the underside of the cover and maybe it is to add rigidity. They also would let the oil that splashed up onto the covers to drop back down more randomly rather than run toward the edges.
Last edited by LightSpeed; 10/02/22 02:17 PM.
The light at the end of the tunnel is actually a train. 2019 M3W
|
|
|
|
Joined: Jan 2022
Posts: 62
Just Getting Started
|
Just Getting Started
Joined: Jan 2022
Posts: 62 |
The spirals are just machining marks left by the cutting tool as it is rotating along a spiral path. There will be very little evidence by feel and will be smooth, what it does do is show the tool path used and the reflections from the aluminium
|
|
|
|
|