Author Topic: Cam swap?  (Read 2128 times)

Offline SixFingerJack

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Cam swap?
« on: 25.05. 2011 15:22 »
My cam is fairly shagged, and in need of either repair or replacement.
My question is, can I fit a cam from a later A7 or A10 in my '48 longstroke motor?
Obviously, the part numbers differ, but the bushes are the same diameter, so are they interchangeable?
The reason I ask is that the later cams seem to be much more easily available than the early ones, and I don't have a later cam to compare with mine.
Thanks chaps.
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Offline trevinoz

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Re: Cam swap?
« Reply #1 on: 25.05. 2011 21:35 »
Jack,
            The later cam is completely different and will not fit.
If you can't get another cam you will have to get yours built up and ground.
This seems to be a common fault with these cams.
I have several and only one is any good and it is one with the part number stamped into the end.
All of the others have no number.

  Trev.

Offline SixFingerJack

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Re: Cam swap?
« Reply #2 on: 25.05. 2011 21:53 »
Thanks Trev, it was worth a try. Looks like I'll have to bite the bullet and get it re-profiled if I can't find a good used one.
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Offline trevinoz

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Re: Cam swap?
« Reply #3 on: 25.05. 2011 21:59 »
Jack,
            The followers are usually buggered as well.
Might be a good idea to get everything nitrided.

  Trev.

Online Brian

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Re: Cam swap?
« Reply #4 on: 26.05. 2011 03:09 »
According to their website Draganfly have the cam and followers in stock. The followers are exchange.

The parts numbers are,  cam 67-695 and followers 67-1024

Offline SixFingerJack

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Re: Cam swap?
« Reply #5 on: 26.05. 2011 10:08 »
Cheers Brian, I just had a look on their website, £110 - ouch!
Oh well, better start saving.....
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Online bikerjohndavies

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Re: Cam swap?
« Reply #6 on: 26.05. 2011 10:10 »
I have used Newman Cams to make a new 67-695 cam for my long stroke A7 and was really impressed with the quality. They also hardended the NOS cam followers I had to match the hardness of the new cam.

I would recommend that you speak directly to David at Newman Cams as they charged me a lot less than Draganfly charge for a exchange one though I had to wait a few weeks for it.

http://www.newman-cams.com/contact.html
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Offline SixFingerJack

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Re: Cam swap?
« Reply #7 on: 26.05. 2011 13:18 »
Thanks for that John, I'll give them a try.
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Offline Beezageezauk

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Re: Cam swap?
« Reply #8 on: 26.05. 2011 14:32 »
Sixfingerjack,

I know a local guy who can reprofile cams and cam-followers at a very reasonable price.  I pass the old ones to him at Scorton Autojumble and get them back a month later, again at Scorton.

Send me a PM if you think I can help.

I'm from Teesside.

Beezageezauk.

Offline SixFingerJack

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Re: Cam swap?
« Reply #9 on: 26.05. 2011 21:51 »
Nice one!
You have mail......
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1948 A7 Rigid