Author Topic: A7 ,A10 Alloy Barrel update  (Read 806 times)

Offline zurferjoe

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A7 ,A10 Alloy Barrel update
« on: 01.07. 2020 14:33 »
Hi there , well with all the pandemics going on I can now do some real work !! Here is a rough  build up of ther A10 Alloy barrel ,its the first tryout casting , and first program check .I got it almost right just need a tick more meat on the corners !! Thats now been done and cast .But ofcourse the machine shop  are not working !!You win a few you lose a few . But it gives me time to build the engines for next years Bonneville ,500/650/750,and run the first one on the road and put a few thousand miles on the clock.But one things form sure it sure is lighter !! So stay safe all you people , look after your selves all the very best Harry   
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The older you get , the faster you were !First picture of the BSA A10 alloy barrel !!

Online RichardL

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Re: A7 ,A10 Alloy Barrel update
« Reply #1 on: 01.07. 2020 14:38 »
THAT is fantastic! Is it something you think can be produced in commercial quantities?

Richard L.
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Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Offline zurferjoe

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Re: A7 ,A10 Alloy Barrel update
« Reply #2 on: 01.07. 2020 15:10 »
Yes I will be ,as there seems to be no barrels available anywhere .And we need to keep these great motorcycles on the road and not in museums !!That why Im making a new twin carb heads ,get the old girl keeping up with the best of them .
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The older you get , the faster you were !First picture of the BSA A10 alloy barrel !!

beezermacc

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Re: A7 ,A10 Alloy Barrel update
« Reply #3 on: 01.07. 2020 16:23 »
Absolutely brilliant to see somebody putting in serious work to keep our bikes going and improve them if possible.
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Offline muskrat

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Re: A7 ,A10 Alloy Barrel update
« Reply #4 on: 01.07. 2020 20:45 »
G'day Joe.
Great work mate.
I'll have a pair (barrels and head) when their done.
Cheers
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Online RDfella

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Re: A7 ,A10 Alloy Barrel update
« Reply #5 on: 01.07. 2020 21:18 »
A cylinder barrel is 'relatively' easy - 2/3 days making the pattern then a day or so machining and fitting liners. If making batches, the pattern time is amortized and making jigs to cut machining time becomes viable. But a cylinder head? Life is too short to go there. I wouldn't even consider making a pattern for that.
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Offline zurferjoe

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Re: A7 ,A10 Alloy Barrel update
« Reply #6 on: 01.07. 2020 22:38 »
On IT !:-)
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The older you get , the faster you were !First picture of the BSA A10 alloy barrel !!

Online RichardL

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Re: A7 ,A10 Alloy Barrel update
« Reply #7 on: 02.07. 2020 11:46 »
"Impressed" is an inadequate word.

Richard L.
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Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Offline Kickaha

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Re: A7 ,A10 Alloy Barrel update
« Reply #8 on: 02.07. 2020 20:36 »
A cylinder barrel is 'relatively' easy - 2/3 days making the pattern then a day or so machining and fitting liners.

Why liners and why not Nikasil ?

I've looked into doing the same thing, cost was going to be about $3000 NZD for the finished product for a one off
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Re: A7 ,A10 Alloy Barrel update
« Reply #9 on: 02.07. 2020 20:56 »
Cast iron liners aren't expensive and are proven. Nikasil has to be farmed out and has suffered problems over the years. I note the price is around £1,500 - I'd expect a new alloy barrel with liners to be less than half of that.
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Online rocker21

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Re: A7 ,A10 Alloy Barrel update
« Reply #10 on: 03.07. 2020 13:00 »
brilliant, let us know when they will be available, i am sure you will sell a few!!!
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Online RichardL

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Re: A7 ,A10 Alloy Barrel update
« Reply #11 on: 03.07. 2020 14:06 »
Am I correct that the combustion chamber cores are intentionally small to allow the chambers to be machined to shape?

Richard L.
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Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Offline Kickaha

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Re: A7 ,A10 Alloy Barrel update
« Reply #12 on: 03.07. 2020 22:43 »
Cast iron liners aren't expensive and are proven. Nikasil has to be farmed out and has suffered problems over the years. I note the price is around £1,500 - I'd expect a new alloy barrel with liners to be less than half of that.

I'd expect it to come in around the £1000-1100 doing it over here with cast liners, Nikasil hasn't really had any problems for decades and is used by all the major manufacturers, I was looking at it from the point that rebores aren't needed so you can select what size piston you want and stick with it
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Offline zurferjoe

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Re: A7 ,A10 Alloy Barrel update
« Reply #13 on: 05.07. 2020 10:02 »
Yes I will do the first ones with liners , everybody can fix those ! And are easier and cheaper to install and make .But I will try out the alloy Nikasil on my planned Bonneville racer ,I dont know if Nikasil gets on with a Nitromethane !Because thats what Im running it on .But ofcourse I will be road testing both liner and Nikasil on the road ,on petrol , puttinga few thousand miles on the clock.Before hitting the salt .Price , yes your about right ,but I havent worked it all out yet , as its not just the cylinder +liners+plus longer crankase studs as the barrel flange is now 17mm thick .But it will be in that ballpark figure ,as I want to sell them and not have a very expensive toy !!
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The older you get , the faster you were !First picture of the BSA A10 alloy barrel !!

Offline a10rgs

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Re: A7 ,A10 Alloy Barrel update
« Reply #14 on: 06.07. 2020 10:35 »
Moin zurferjoe,

do you know Rainer Traupel?

http://www.motortechnik-traupel.de/motortechnik.html

He makes A65 aluminium barrels plated with Nikasil! Maybe he can give you some helpful information!

Uwe 
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