Commando Crankshaft Porn

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Fast Eddie said:
By 'Eck lad 'looks a gud 'un...

Now for the questions...

Is that one of Steves?

Is it stock stroke?

Did it come from him fully assembled and balanced?

What will be joining it in the engine in terms of rod, piston, cam specs?

And finally... Why do you 'need' it... Haven't gone and broke one I hope?!
Click to expand...

Eddie,

Yes, a standard stroke Maney number as-delivered, balanced for Jim's rod's & pistons.
I currently have a Maney cam for it, but I'm having unclean thoughts about Jim's set up there too.

As for 'need'... you really 'need' to ask? :wink:
Nope - nothing broken here - however, I was talking to a local engine builder who was running his motor on the dyno when the flywheel burst.
Apparently one of the cam-followers was salvageable :shock:

The motor will be going in my PR replica which has been languishing on the bench for a long time waiting for me to be able to stump up for this.

A busy winter ahead now...
 
B+Bogus said:
Fast Eddie said:
By 'Eck lad 'looks a gud 'un...

Now for the questions...

Is that one of Steves?

Is it stock stroke?

Did it come from him fully assembled and balanced?

What will be joining it in the engine in terms of rod, piston, cam specs?

And finally... Why do you 'need' it... Haven't gone and broke one I hope?!
Click to expand...

Eddie,

Yes, a standard stroke Maney number as-delivered, balanced for Jim's rod's & pistons.
I currently have a Maney cam for it, but I'm having unclean thoughts about Jim's set up there too.

As for 'need'... you really 'need' to ask? :wink:
Nope - nothing broken here - however, I was talking to a local engine builder who was running his motor on the dyno when the flywheel burst.
Apparently one of the cam-followers was salvageable :shock:

The motor will be going in my PR replica which has been languishing on the bench for a long time waiting for me to be able to stump up for this.

A busy winter ahead now...
Click to expand...

Ooh eck!

Busy winter ahead indeed! Do keep us updated on your cam decision Andy and please, please do a picture build blog for us to keep us entertained over the long dark winter months!
 
B+Bogus said:
Early Christmas pressie...

Very challenging for a Lancastrian to be sending money over the Pennines, but needs must.

Commando Crankshaft Porn
Click to expand...

You will be very happy here. Thumbs up.
 
B+Bogus said:
Fast Eddie said:
Sent you a PM Andy...
Click to expand...

Replied - hope it came through?
Click to expand...
Hey Hey Now, what's all this then? You two wispering into each other's ears just ain't fair, we have inquiring minds here you know!! :lol: The rest of us are gonna get jealous if you keep this up :mrgreen:
 
Life's hard innit?

Here is a repetitive conundrum that I face...

Start thinking about what to do to my Commando next...

Peruse Steve's web site and conclude that a big bore block is the answer...

Then decided that would really benefit from one of his nice strong cranks...

And that would benefit from a set of his nice strong cases...

But hang on a minute, if I'm buying a new block, crank and cases... It makes sense to go for the 1007 kit doesn't it?

Not easy being an old bike obsessive is it ?!?
 
Fast Eddie said:
.................Not easy being an old bike obsessive is it ?!?
Click to expand...
True that Nigel, but it sure is fun watching which way you're gonna go with your bike build. :mrgreen: However if memory serves......you were wrestling with yourself over the TTI gear box question :D My wife always said that I liked to stir things up, and here I go again, sorry 'bout that, this is a crankshaft thread after all right, Soooo, let me just say ....go big or go home Eddie--- get the thousand & seven crank and set it on your bench, ther rest is sure to follow :shock:
 
cjandme said:
Fast Eddie said:
.................Not easy being an old bike obsessive is it ?!?
Click to expand...
True that Nigel, but it sure is fun watching which way you're gonna go with your bike build. :mrgreen: However if memory serves......you were wrestling with yourself over the TTI gear box question :D My wife always said that I liked to stir things up, and here I go again, sorry 'bout that, this is a crankshaft thread after all right, Soooo, let me just say ....go big or go home Eddie--- get the thousand & seven crank and set it on your bench, ther rest is sure to follow :shock:
Click to expand...

Your wife's right ... !
 
All said and done cost on a Maney 1007 engine is around 10,000 GBP as near as I can tell. I found an old article in which Steve mentions that his complete 1007 engines are priced at 8750 gbp. He also lists individual prices of cases, cranks etc and those are all about 15 percent lower than the prices on his current website, so the 10 k GBP figure is going to be close.
That's just over 20 k Canadian to which one must add about 6 k CDN? For a TTI transmission.
So for 26 k Canadian one can convert their Commando into a wolf in sheep's clothing, but there won't be any Norton remaining in the drive train. And it will still be considered cruiser level power output as compared to new machinery.
I have contemplated going this route as no doubt many others here have. The dream version would also encorporate many of Ludwigs ideas on weight reduction.
Having already gone thru a similar expensive but fun process building a Vincent Special, I need to leave the big, light Norton idea on a shelf.
It would be fun to watch someone else take a project like that on. There have been a number of racers built in the 1007 size, but has anyone built lightweight 1007 roadbike yet?

Glen
 
worntorn said:
All said and done cost on a Maney 1007 engine is around 10,000 GBP as near as I can tell. I found an old article in which Steve mentions that his complete 1007 engines are priced at 8750 gbp. He also lists individual prices of cases, cranks etc and those are all about 15 percent lower than the prices on his current website, so the 10 k GBP figure is going to be close.
That's just over 20 k Canadian to which one must add about 6 k CDN? For a TTI transmission.
So for 26 k Canadian one can convert their Commando into a wolf in sheep's clothing, but there won't be any Norton remaining in the drive train. And it will still be considered cruiser level power output as compared to new machinery.
I have contemplated going this route as no doubt many others here have. The dream version would also encorporate many of Ludwigs ideas on weight reduction.
Having already gone thru a similar expensive but fun process building a Vincent Special, I need to leave the big, light Norton idea on a shelf.
It would be fun to watch someone else take a project like that on. There have been a number of racers built in the 1007 size, but has anyone built lightweight 1007 roadbike yet?

Glen
Click to expand...

And that Glen, is exactly where my estimations end up and is exactly why I have not (and intend not) to do it!
 
worntorn said:
......There have been a number of racers built in the 1007 size, but has anyone built lightweight 1007 roadbike yet?

Glen
Click to expand...

Time was when if you weren't looking at a big bore engine you were being told you would get anywhere in UK classic twins.....

This has been my fullest season since 1979....and I haven't seen one.....and apart from one pot going to an 850, the honours went to 750s....

And if you build one for a road bike, do you need to make it lightweight for best enjoyment?, probably not!
 
I was digging through some files and came across a nice picture of a Steve Maney 59.6 mm crank with Herb Becker custom rods. I don't recall the rod lengths but they were stubbing little things. The next rendering of the motor was with a 180 degree crank with middle bearing and smaller rod journals shown earlier in this thread.

Commando Crankshaft Porn
 
The Answer to the Commando Racers Prayer . Please send checques to . . . . . .

Commando Crankshaft Porn


NOTE the Tag .

Anyone Tried This ( unobtainium ) .
 
Surely the only reason anyone would buy or build a Maney motor would be for some kind of classic racing ? If you were going to do that and the rules permitted, you would use a lightweight frame as well. In the end a lot depends on what sort of circuits you are going to race on. A commando based bike is probably at it's best on tight circuits, so 'point and squirt' is not really the way to go under those circumstances. In Australia, most of the historic guys believe that 'big is better', so high power top end power is the go. They usually end up on the ripple strips coming out of corners, then blast down the straights. There is no way most of them can be beaten in a straight out drag. The only way is to get around the corners faster and get under them. Then you have to watch out you don't get involved in a coming-together two thirds of the way down the next straight.
I think if I owned a commando road bike, I would keep it as original as possible. It is what it is and any changes can destroy it's intrinsic value.
 
Not so sure, a Maney crank with original rods and Gandini pistons would make a very light set up, you might not want to race with it but it would most probably transform and be ideal for a road bike and still keep the appearance.
 
Matt Spencer said:
The Answer to the Commando Racers Prayer .
Click to expand...

F1 cranks were made almost entirely from steel even when Titanium was still allowed. Crank shaft design - like most design tasks - is mainly driven by stiffness. Titanium has a Young's modulus which is only 50% compared to steel but the density is 60%. Do the maths .... ;)


Tim
 
Madnorton said:
Not so sure, a Maney crank with original rods and Gandini pistons would make a very light set up, you might not want to race with it but it would most probably transform and be ideal for a road bike and still keep the appearance.
Click to expand...

I'm not familiar with Gandini pistons, are they particularly lighter than stock ones?
 
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