billet cases

lcrken · Dec 2, 2015

Just out of curiosity, what is the alloy used for the cases? In particular, is it weldable if repairs are needed? Not that I would expect to ever have to weld on these cases, but I've had to repair several Commando cases in the past after severe racing use, and I'm just wondering if it would be possible.

Ken

trimachining · Dec 2, 2015

84ok said:
so what's the history with these beauts? any in use?

Yes there is a really fast 750 cleaning up everything in it's path, it was his idea to make these as he cracked the cast ones

trimachining · Dec 2, 2015

lcrken said:
Just out of curiosity, what is the alloy used for the cases? In particular, is it weldable if repairs are needed? Not that I would expect to ever have to weld on these cases, but I've had to repair several Commando cases in the past after severe racing use, and I'm just wondering if it would be possible.

Ken

Made from 6061-T6

lcrken · Dec 2, 2015

Thanks, Richie. For those who might be curious, that's an alloy that TIG welds very nicely.

Ken

cjandme · Dec 2, 2015

Thanks for making these Richie, I for one hope that you would reconsider this being your last run ! :mrgreen:

JimC · Dec 2, 2015

You see things like this and you get to thinking: Trimachining cases, Steve Maney crank and barrels, Jim Schmidt rods, pistons and cam, Fullauto head, Jim Comstock prep and you've got a nice start for $10,000.

Fast Eddie · Dec 2, 2015

JimC said:
You see things like this and you get to thinking: Trimachining cases, Steve Maney crank and barrels, Jim Schmidt rods, pistons and cam, Fullauto head, Jim Comstock prep and you've got a nice start for $10,000.

Indeed... A nice start...

Still a lot of other bits required to turn that $10k pile of bits into a running engine.

And, assuming it was putting out the power it should, it'd really need a TTI box, and some big fancy FCRs, and a good belt primary, and etc, etc.

So it'd be closer to $20k by the time you'd done...

SteveA · Dec 2, 2015

JimC said:
You see things like this and you get to thinking: Trimachining cases, Steve Maney crank and barrels, Jim Schmidt rods, pistons and cam, Fullauto head, Jim Comstock prep and you've got a nice start for $10,000.

If you are going to invest that much you should think one piece crank (Hemmings, Schmitt, Nourish or other), and get your head around $20K plus.

You are into around £10K including taxes for Steve Maney cases and crank, JSM pistons/rods and Fullauto.....decent cam and all the other parts that really do add up...ask me how I know!

Very few of us will stress a motor so far that Maney cases won't cope.

The cases are beautiful, and of course I want some, but I don't need them, and honestly I can't afford them, even if I feel they represent good value for a bulletproof product at £2K but the tax man will kill you here.....and get you up to nearer £3K....which gets Maney cases and crank inc the VAT at 20%

JimC · Dec 2, 2015

Fast Eddie said:
JimC said:

You see things like this and you get to thinking: Trimachining cases, Steve Maney crank and barrels, Jim Schmidt rods, pistons and cam, Fullauto head, Jim Comstock prep and you've got a nice start for $10,000.

Click to expand...

Indeed... A nice start...

Still a lot of other bits required to turn that $10k pile of bits into a running engine.

And, assuming it was putting out the power it should, it'd really need a TTI box, and some big fancy FCRs, and a good belt primary, and etc, etc.

So it'd be closer to $20k by the time you'd done...

Exactly. $10K is just the ante.

Brooking 850 · Dec 2, 2015

I have a set that is work in progress and this is the crank I am putting it in
Regards Mike

SteveA · Dec 2, 2015

Brooking 850 said:
I have a set that is work in progress and this is the crank I am putting it in
Regards Mike

....well your location does say Bay of Plenty!

8)

gortnipper · Dec 2, 2015

JimC said:
You see things like this and you get to thinking: Trimachining cases, Steve Maney crank and barrels, Jim Schmidt rods, pistons and cam, Fullauto head, Jim Comstock prep and you've got a nice start for $10,000.

:shock: :mrgreen:

SkipSchloss · Dec 2, 2015

One thing to keep in mind here: The purchase of a set of these CNC cases would make you a development builder. These may be wonderful cases, then again, there could be something not quite right. You don't know because these aren't proven. You won't know until you have a lot of race miles on the motor you build with these cases.

The Steve Maney cases have a long history of racing success, they are actually quite inexpensive (in the context of this insane realm). They are not totally CNC but they're proven.

And having built several engines with Maney cases...there's never been a problem.

So, you can be the "development guy" who tries out these new cases, or you can just go buy proven, bulletproof cases from Steve Maney.

Not financially affiliated, just sayin'. I personally prefer race-proven parts with years of history over shiny bits that haven't run 8000 RPM at Bonneville.

Skip Schloss
Flying Fish Motorcycles
Whitefish, MT

trimachining · Dec 2, 2015

Hi Skip,
These are well race proven, we made these after cracking a set of Maney cases, the bike has raced internationally in Australia and kicked ass there, the racing fraternity there were well impressed, it has raced here in New Zealand for 4 seasons and the cases have had no problems, have always remained oil tight and there are more horses being pumped through them now

grandpaul · Dec 2, 2015

Brooking 850 said:
... and this is the crank I am putting it in

Wow. Nice bit right there.

Shiny.

johnm · Dec 3, 2015

Brooking 850 said:
I have a set that is work in progress and this is the crank I am putting it in
Regards Mike

Hi Mike

Is that a crank from the guy in Gisborne? I'm thinking about getting a 90 deg crank done for a 500.

Cheers
John

Brooking 850 · Dec 3, 2015

Hi John, no its a crank from Graham Martin in Hastings.
There is quite few in the classic bike motors that arw in the NZCMRR as well at least one Norton side chair as well.
One of his will be perfect for your 500
Regards Mike

johnm · Dec 3, 2015

Brooking 850 said:
Hi John, no its a crank from Graham Martin in Hastings.
There is quite few in the classic bike motors that arw in the NZCMRR as well at least one Norton side chair as well.
One of his will be perfect for your 500
Regards Mike

That's right. Sorry I meant Hastings !! Brain fading !

John Saywell in Wellington said he had bought some new machining equipment. I saw one of his very early cranks back in about 2008 or even earlier. For a Matchless twin that John was rebuilding.

Seems the Velo boys had a good time down at the Burt Munro with 1, 2, 3 finishes on the two KTTs and the big Velo. Chris Swallow, Cloud Craig Smith and Bill Biber on the big Velo. Chris also beat a lot of 750s on the street track with the 250 Eldee.

cash · Dec 3, 2015

Jim,
You'll be 3D printing them next.

Another nice job.

Dave

J. M. Leadbeater · Dec 3, 2015

Very pretty but only 'stronger' if there is more meat in the areas where the original cases were so thin they failed........... Of course if you want to take a motor designed as a low revving 'soft' 500cc twin way back in the late 1940s and turn it into a 920 cc or greater lump with super high lift cam, rediculous compression ratio and want to rev the nuts off of it then I suspect srtonger cases are required along with a billet one piece crank..stronger rods etc etc ...but please remember the gearbox has to deal with all the extra torque the motor is able to produce and that was designed even earlier for 500 c singles producing probably 25HP and no more than 25 ft lb of grunt at the crank..... luckily for us the designer used decent safety factors but as NVT or whatever they were called then even with the 750 motors the gearboxes were not up to the job as they poodled around the TT course...not till Mr Williams got his hands on the bikes. and found the mainshafts were deflecting etc etc.
Friend came round today and apart from raiding the garage loft looking for carb heat insulators over coffee (he is trained to make his own when visiting) he showed me pictures of the Norton 4 cylinder motor a friend of his is reproducing including producing drawings and patterns ........a copy of the one Norton were at one time going, in theory, to produce for racing. Tis amazing what some people do to amuse themselves.