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Panthersteve
 Post subject: Cooper S crankshaft
PostPosted: Thu Jun 07, 2007 2:10 pm 
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Location: Ipswich Qld
Hi

I saw this crankshaft sell on ebay http://cgi.ebay.com.au/ws/eBayISAPI.dll ... &rd=1&rd=1

What do you all think of this, is it a good price, fair price, high price :?:

Cheers
Steve

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dove grey 64
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PostPosted: Thu Jun 07, 2007 2:15 pm 
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i think that price is pretty fair, i've heard from a few sources they normally cost about that much

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Minimic
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PostPosted: Thu Jun 07, 2007 3:58 pm 
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3 or 4 days ago I saw it at about $519 buy it now. He often relists and ups the amount every day.

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designer
 Post subject: cooper s crankshaft
PostPosted: Thu Jun 07, 2007 4:53 pm 
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Is the number en40b stamped on the actual crankshaft and if it is can it be viewed on a short motor ?

Are there visible differences between it and another mini crankshaft ?
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simon k
 Post subject: Re: cooper s crankshaft
PostPosted: Thu Jun 07, 2007 6:19 pm 
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designer wrote:
Is the number en40b stamped on the actual crankshaft and if it is can it be viewed on a short motor ?

Are there visible differences between it and another mini crankshaft ?


it's not stamped, it's cast into it, and yes, you can see it on a short motor

I think that's cheap for an S crank

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Morris 1100
 Post subject: Re: cooper s crankshaft
PostPosted: Thu Jun 07, 2007 7:29 pm 
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skssgn wrote:
designer wrote:
Is the number en40b stamped on the actual crankshaft and if it is can it be viewed on a short motor ?

Are there visible differences between it and another mini crankshaft ?


it's not stamped, it's cast into it,
It's not cast. 8)
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drmini in aust
 Post subject: Re: cooper s crankshaft
PostPosted: Thu Jun 07, 2007 7:32 pm 
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Morris 1100 wrote:
skssgn wrote:
designer wrote:
Is the number en40b stamped on the actual crankshaft and if it is can it be viewed on a short motor ?

Are there visible differences between it and another mini crankshaft ?


it's not stamped, it's cast into it,
It's not cast. 8)

You are right, it's a forged crank. 8) The EN40B is raised letters, from the forging dies. :wink:

I always get a laugh when Poms say they built a Mini donk with "steel crank and rods". What do they think stock ones are, licorice? All A series cranks and rods are forged steel, for those who are wondering. :)

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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simon k
 Post subject: Re: cooper s crankshaft
PostPosted: Thu Jun 07, 2007 8:31 pm 
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Morris 1100 wrote:
skssgn wrote:
designer wrote:
Is the number en40b stamped on the actual crankshaft and if it is can it be viewed on a short motor ?

Are there visible differences between it and another mini crankshaft ?


it's not stamped, it's cast into it,
It's not cast. 8)


OK - can you explain the difference between casting and forging? I really don't know

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graham in aus
 Post subject:
PostPosted: Thu Jun 07, 2007 8:37 pm 
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Pour molten steel into a mould and cool to 'set' = Cast

Heat steel till soft then bash / squash between big forging tools = forged

Bit simplified, but correct! :P

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Morris 1100
 Post subject:
PostPosted: Thu Jun 07, 2007 8:40 pm 
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Forging is heating up a lump of metal and knocking it into shape.
Casting is melting metal and pouring into a mould of the shape.
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drmini in aust
 Post subject:
PostPosted: Thu Jun 07, 2007 8:42 pm 
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graham in aus wrote:
Pour molten steel into a mould and cool to 'set' = Cast

Heat steel till soft then bash / squash between big forging tools = forged

Bit simplified, but correct! :P

If you have a choice, forged is stronger than cast. The material's grain follows the shape of the part.
For the same reason forged is stronger than billet, if you are talking crankshafts for example. :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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simon k
 Post subject:
PostPosted: Thu Jun 07, 2007 8:48 pm 
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wow - forging of a crank must be a pretty neat process to watch....

what does 'drop forged' mean on my spanners? sounds like clever marketing

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Morris 1100
 Post subject:
PostPosted: Thu Jun 07, 2007 9:17 pm 
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http://science.howstuffworks.com/question376.htm
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drmini in aust
 Post subject:
PostPosted: Thu Jun 07, 2007 9:22 pm 
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`Drop forged' just means the top die is dropped/driven against the bottom one, drop forging is an impact process.
It doesn't tell you what material it is, could be drop-forged chewing gum if made in China.

The magic words for good spanners are "chrome-vanadium"... :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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Mick
 Post subject:
PostPosted: Thu Jun 07, 2007 9:37 pm 
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Location: Under the bonnet son!
I've got a set of russian spanners here made from "Chrom Vandium" apparently :roll: .

Not all S cranks have EN40B letters necessarily, later ones (68'ish on?)have an AEG480 part number.

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