I broke the Moser shafts !!!

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mgbv8
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I broke the Moser shafts !!!

Post by mgbv8 »

Dagnabbit !!!

I thought that I was safe last weekend. I hit the track for a test run and made a 9.6 which was good as it got me back on last years PB time for the first run of the season which I was happy with. Heres a rooftop view of the 9.6 run.



Then I added 3 degree's of timing and tried again. This time not so good as the extra grunt bust my shafts :(




Perry Stephenson

MGB GT + Rover V8

9.62 @ 137.37mph

Now looking for 8 seconds with a SBC engine

http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw



https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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Blown v8
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Post by Blown v8 »

Unlucky !
What's your next move ?
Are Moser stronger then Strange ?
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Eliot
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Post by Eliot »

Do i win a Jaffa cake when you eventually you drop a ford 9" and a blown small block into it? :D
Eliot Mansfield
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kiwicar
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Post by kiwicar »

Hi
no comment!
best regards
Mike
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kev_the_mole
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Post by kev_the_mole »

Eliot wrote:Do i win a Jaffa cake when you eventually you drop a ford 9" and a blown small block into it? :D
+1 :D
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It's an engine Jim.....but not as we know it ;)
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stevieturbo
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Post by stevieturbo »

Moser are the cheaper of the shaft suppliers, although they do offer a few different styles

What diameter are they, splines, how did they fail etc ?

I twisted a few splines years ago. Seemed the thicker the shaft itself, the more chance of the splines twisting.

Basically...a flexible twisty shaft can be a good thing.

I since moved on to some shafts from Mark Williams. Much more expensive, totally different material, and zero issues.
9.85 @ 144.75mph
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0
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mgbv8
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Post by mgbv8 »

They did this!! Well one did and the other one was twisted just as bad


Image

Perry Stephenson

MGB GT + Rover V8

9.62 @ 137.37mph

Now looking for 8 seconds with a SBC engine

http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw



https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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stevieturbo
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Post by stevieturbo »

Time to either go bigger or different material.

Not sure what base you use, but if it's within their range, speak to Mark Williams.

Or ARRC I think used Strange shafts on Coops axle ?

When I enquired with Strange they said they couldnt offer me anything for some reason
9.85 @ 144.75mph
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0
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mgbv8
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Post by mgbv8 »

stevieturbo wrote:Time to either go bigger or different material.

Not sure what base you use, but if it's within their range, speak to Mark Williams.

Or ARRC I think used Strange shafts on Coops axle ?

When I enquired with Strange they said they couldnt offer me anything for some reason


The shafts were made from stock size Ford 9" blank stock and machined to have MGB hub setup on one end and then turned down to fit the MGB diff gears on the drive ends.

I have now figured out that I can slightly alter my diff cage so the thick section of the shaft will fit through the bearing carriers and into the diff cage.

I have also found a Ford 9" mini spool jobby that can be machined down to fit inside the diff when the four small cogs are removed. This only fixes into postion with a diff pin, so I intend to make some girdle plates to weld onto the spool and onto the diff cage itself. You can see in the picture how much fatter the new shafts will be with Ford 31 spline ends.

Image

Perry Stephenson

MGB GT + Rover V8

9.62 @ 137.37mph

Now looking for 8 seconds with a SBC engine

http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw



https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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mgbv8
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Post by mgbv8 »

The Mini Spool that Mike found for me looks like this


Image

Perry Stephenson

MGB GT + Rover V8

9.62 @ 137.37mph

Now looking for 8 seconds with a SBC engine

http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw



https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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Coops
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Post by Coops »

yup mine are strange shafts :D
Regards Tony C (COOPS)
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stevieturbo
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Post by stevieturbo »

With such a large shaft and small splines, they are always going to take a bashing.

The only Moser shafts that never twisted on me were the 28 spline small diameter shafts

All the 31 splines twisted, but they were also all larger diameter shafts. As did the 28 spline with the larger diameter shaft.

So a bit of flex can go a long way to saving them

But ultimately they need to be stronger anyway. Give Mark Williams a shout

These are the ones I got.

http://markwilliams.com/axleHitorque.as ... goryID=135
9.85 @ 144.75mph
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0
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DaviesDJ
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Post by DaviesDJ »

Wow Pel that is some twist! What grade of steel are those ?? Did they go at launch?? And if so would it help to ease off on the initial NOS delivery?? Bet that made an expensive noise when it went!! One of those Nast metallic noises that resonates through the cabin!!!
Best wishes mate

Dave
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Post by ChrisJC »

Do people ever do anything radical like get the axle of a 7 tonne truck and make that narrower? I would think going totally overboard would eliminate this kind of issue.

Impressive twist though on those spines!

Chris.
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Blown v8
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Post by Blown v8 »

ChrisJC wrote:Do people ever do anything radical like get the axle of a 7 tonne truck and make that narrower? I would think going totally overboard would eliminate this kind of issue.

Impressive twist though on those spines!

Chris.
This is why the Ford 9" is so sought after !
Most American cars/trucks go about 2ton plus!put it in a lightweight car with decent shafts!And you have a serious rear end
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