1930 cam profiles.

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Michael Will
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1930 cam profiles.

Postby Michael Will » Mon Aug 12, 2019 4:43 am

Hi can anyone help me with 1930 model F cam profiles please. :mrgreen:

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brenton.roy
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Re: 1930 cam profiles.

Postby brenton.roy » Mon Aug 12, 2019 2:25 pm

Hi Michael,
Models E and F had the same cam timing - 5,55,60,20.
Quite similar to the sidevalve cam 5,50,55,20 (maybe same profile, different lifters..)
Model G 22,70,70,25.
The cam that was used in LG, NG and VG models through the 30's and 40's and w/ng has 5,55,60,20 timing. I think this is the F cam profile.
The red hunter cams for the 30's - and 40's sidevalves are 22, 70, 70, 25 - I think the A6 664 profile
On this basis, your original cam profile would be similar to this image that I have borrowed from Google.
The F cam profile is very torquey, but lacks much go at higher revs. The motor sounds more urgent, but speed stays about the same.
Is this the cam you have?
This factory info is in the club library, links below.
http://www.arielownersmcc.co.uk/members ... p?show=650
http://www.arielownersmcc.co.uk/members ... img032.jpg
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Ariel-camshaft-assembly-F-cam-LF.jpg
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'51,'56 Squares, '48 VH, '27 Model C, R67/2, Mk IV Le Mans, '06 Super Duke and Ariel projects.

Michael Will
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Re: 1930 cam profiles.

Postby Michael Will » Mon Aug 12, 2019 9:29 pm

Thank you very much, you are a legend.

Michael Will
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Re: 1930 cam profiles.

Postby Michael Will » Mon Aug 12, 2019 9:30 pm

Yes my cam has the "F" profile stamped, I won't be revving engine to high so may go with the information you have provided.

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brenton.roy
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Re: 1930 cam profiles.

Postby brenton.roy » Mon Aug 12, 2019 10:01 pm

no worries. Please keep us in the loop as you go.
'51,'56 Squares, '48 VH, '27 Model C, R67/2, Mk IV Le Mans, '06 Super Duke and Ariel projects.

Michael Will
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Re: 1930 cam profiles.

Postby Michael Will » Wed Aug 14, 2019 5:56 am

Hi again,
I have been in contact with Franklins in New Zealand after searching through the forum posts, they have the A6-664 profile you talked about for the early Red Hunters and model G,They do have the profiles for the 1931 500 ohv maybe this will work for the "Black Ariels" to? I

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Re: 1930 cam profiles.

Postby tony.barnett » Wed Aug 14, 2019 12:21 pm

Correct me if I'm wrong, but wasn't the A6/664 cam also a sidevalve cam? I seem to recall his from when I was trying to figure out which cam to put in my 38VH. It certainly made it go better anyway.
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Re: 1930 cam profiles.

Postby Simon.Gardiner » Wed Aug 14, 2019 2:06 pm

A6/664 was widely used for decades.
Maybe the Drags website can help:
https://www.draganfly.co.uk/ariel/4-str ... om-end-696

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'55 Huntmaster, '56 VH, ' 51 VH, '80 R100RT, '00 Sprint ST (but all those Ariel parts can only make one running bike...)

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brenton.roy
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Re: 1930 cam profiles.

Postby brenton.roy » Wed Aug 14, 2019 3:14 pm

Adrian at Franklins will look after you. They do good work and have a good range of Ariel profiles.
The 664 profile would probably be a good choice.
'51,'56 Squares, '48 VH, '27 Model C, R67/2, Mk IV Le Mans, '06 Super Duke and Ariel projects.

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Re: 1930 cam profiles.

Postby cmfalco » Wed Aug 14, 2019 5:27 pm

Michael Will wrote:Hi can anyone help me with 1930 model F cam profiles please.
When I read this I assumed Michael wanted the cam profile, i.e. a plot of lift vs. angle. I have yet to run across such plots for any Ariel cam but measured them myself for the cams on my 1928 Model C. For what it's worth, the mild Gold Star trials cams are a rough match to the Ariel's profile.

However, from the following it sounds like cam profiles are to be found somewhere. My question is, where?
brenton.roy wrote: I think the A6 664 profile
Michael Will wrote:they have the A6-664 profile you talked about for the early Red Hunters and model G,
tony.barnett wrote: wasn't the A6/664 cam also a sidevalve cam?
Simon.Gardiner wrote:A6/664 was widely used for decades.
brenton.roy wrote:The 664 profile would probably be a good choice.

Or, are the above just referring to timing, not profiles?


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