Click here to return to the home page.
Morgan 3 Wheeler
Who's Online Now
4 members (MogOnTheMove, James B W, Rovert, yobtaf), 317 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
John V6 70
DaveW 67
+8Rich 66
Newest Members
4199, GOFFO1965, Joske Vermeule, SBP17, Ulfulf
9,208 Registered Users
Newest Topics
Ozzy Osbourne
by Burgundymog - 22/07/25 08:28 PM
Super Three chain drive conversion
by Alastair - 22/07/25 04:18 PM
M3W - Anyone know this car?
by Biggle - 22/07/25 01:40 PM
S&S X Wedge Engine Gasket Source
by Morgan Dude - 22/07/25 02:13 AM
Supermax sprocket
by Laurens - 21/07/25 08:26 AM
Morgan 3 Wheeler song
by Dutch - 21/07/25 12:31 AM
Technical drawings, dimensions, 3D model M3W
by Oskar - 20/07/25 04:13 PM
Latest Photos
Motorworld München
Motorworld München
by Oskar, July 20
visit to Classic Remise Düsseldorf
my book
my book
by Oskar, July 20
More Pictures of the MHR Visit
More Pictures of the MHR Visit
by DaveK, July 19
Visit to the Factory- Historic Morgan Group
Forum Statistics
Forums34
Topics48,341
Posts813,001
Members9,208
Most Online1,046
Aug 24th, 2023
Today's Birthdays
RedThree
Previous Thread
Next Thread
Print Thread
Page 5 of 7 1 2 3 4 5 6 7
Krod #412006 01/12/16 09:15 PM
Joined: Jul 2015
Posts: 38
C
Just Getting Started
OP Offline
Just Getting Started
C
Joined: Jul 2015
Posts: 38
Originally Posted By Krod
Aerodynamics and down force are not in your favor to get up to 160MPH. Not only that, but I would make sure whatever tires you are using can handle such speeds. I would also suggest having a real roll cage made instead of roll hoops which provide nearly no protection whatsoever.


Yup, which is why I'm thinking new motor and possibly forced air. Also want to test some wind screens in a wind tunnel to see what if any impact they have (I suspect that the head of the driver will not be able to be overcome in that regard)

Joined: Jul 2015
Posts: 38
C
Just Getting Started
OP Offline
Just Getting Started
C
Joined: Jul 2015
Posts: 38
Originally Posted By Dan_Lockwood
A US gallon of gas weighs in at 6.3#/gal.

Adding another 65# to 70# over the rear wheel could have some bad mojo on the handling of the M3W.

In 19" tires, I highly doubt you'll get anywhere near that type of speed rating. If you swapped out to 18" front, you may be able to get tires rated that high. The rear tire may also be problem as that size tire is usually not used on cars that could get anywhere near that speed, so tire manufacturers won't spend the money making a tire that no one can use.

I do wish you lots of luck. I also agree with the full on roll cage as a protector, just in case.

I could see you going to TX where they run that speed thing on the closed freeway of something like that. You'll need a very long run at this.

Here's a VERY simple speed, rpm, tire, ratio calculator.

Enter in the 6000 rpm, 25" tire dia, 160 mph and it tells me that I need a 2.79 final drive ratio. That probably isn't too far off actually.

CLICK HERE FOR THE CALCULATOR


From what I've seen that's close to the stock bevel box ratio. Given the 5th gear on the transmission is 0.814, that should be within the realm of possibility. Does anyone know off the top of their head what the exact ratio on the bevel box is?

Joined: Oct 2012
Posts: 2,776
Likes: 59
Talk Morgan Expert
Offline
Talk Morgan Expert
Joined: Oct 2012
Posts: 2,776
Likes: 59
160mph? Interesting challenge, don't think I would want any more high up weight than avoidable, so once a cage is on then you probably want the fuel to be as low as possible, over the rear wheel might be just about the worst place possible! Just how far do you need to go on one fill? The standard tanks are at least fairly low down.
The rear tyre and gearing issues could be sorted out by finding a larger wheel and lower profile Z-rated tyre combination with a slightly larger rolling radius and find and fit a slightly smaller sprocket. There are motor sport oriented alloy wheel manufacturers who stock rims as blanks that are then machined to suit the final application; they should be able to copy the centre of the M3W wheel and it can then be bolted to the standard hub. You'll probably have to extend the swingarm a bit to get correct belt tension but you'll probably need to stiffen the swing arm and improve the clamping of the spindle to take the load anyway so the extension will be a minor detail really!
18" rims on the front should give a selection of bike tyres that will take the speed but I have no idea if the spoked wheels will stand the loading at that kind of speed.
I have a feeling that getting the (theoretical) power for 160 is probably the easy bit - depending on how long you want the motor to last at max revs - and the rolling chassis will be the awkward bit to sort out. Definitely don't want to get to 159 only to find that a wheel isn't up to the job.
Best of luck!

Joined: Nov 2013
Posts: 756
Likes: 9
G
Talk Morgan Regular
Offline
Talk Morgan Regular
G
Joined: Nov 2013
Posts: 756
Likes: 9
50%

Joined: Mar 2016
Posts: 213
I
L - Learner Plates On
Offline
L - Learner Plates On
I
Joined: Mar 2016
Posts: 213
Gotta add my 2cents as a former motorcycle crew member at Bonneville. The M3W has the aerodynamics of a brick, and I think the hp requirement rises with the cube of the speed. I just don't think you can squeeze that required power out of a V Twin.


Inge

Inge #412037 01/12/16 11:02 PM
Joined: Jul 2015
Posts: 38
C
Just Getting Started
OP Offline
Just Getting Started
C
Joined: Jul 2015
Posts: 38
Originally Posted By Inge
Gotta add my 2cents as a former motorcycle crew member at Bonneville. The M3W has the aerodynamics of a brick, and I think the hp requirement rises with the cube of the speed. I just don't think you can squeeze that required power out of a V Twin.


Yup, I'm aware of this, and it may very well be impossible. But I'm going to give it a go none the less smile

Joined: Mar 2016
Posts: 213
I
L - Learner Plates On
Offline
L - Learner Plates On
I
Joined: Mar 2016
Posts: 213
You get an A+ for spirit! The fun is in the chase.


Inge

Joined: Jun 2016
Posts: 430
Learner Plates Off!
Offline
Learner Plates Off!
Joined: Jun 2016
Posts: 430
I'm with Inge. You're going to need cubic HP to achieve that velocity. I doubt you would be able to get a M3W up to 160 even if dropped from a plane. And moreover, conflating a M3W with a performance car seems entirely inappropriate. But I admire your spirit in giving it a go, and hope that your insurance is paid-up!

Joined: May 2014
Posts: 362
K
Learner Plates Off!
Offline
Learner Plates Off!
K
Joined: May 2014
Posts: 362
The beauty of the M3W is that you do not have to go everywhere flat out in order to get pleasure from driving it, so why would anybody want to do 160mph in a car that is clearly not designed for that speed?

Having said that, it would be a boring old world if we all wanted to do the same thing, so good luck and I hope you acieve it safely.
It would be nice to go down in the record books and still be alive for people to congratulate you.

Joined: Jan 2013
Posts: 655
Likes: 1
WW11 MOG
Talk Morgan Regular
Offline
WW11 MOG
Talk Morgan Regular
Joined: Jan 2013
Posts: 655
Likes: 1
Hey Dab, a former champion racer could add some real spice to the Morgan 3 wheeler racing scene....

The cost isn't prohibitive. After all there isn't much required, or available, if you run in Standard or Touring Modified class and all that's really required for Racing Class are a pair of 18 inch front wheels and racing tyres. I doubt there is much advantage in Stage 3 over a well sorted Stage 2 engined M3W.

I planning to run my promised Curborough taster day in the Spring. Would be great to see you show us how to do it

Page 5 of 7 1 2 3 4 5 6 7

Moderated by  TalkMorgan 

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5