I thought jet size numbers were based on drops of petrol per certain period of time. It seems like @Magnetoman has addressed this. Also, Amal jet sizes after the pre-monoblocs changed along with their style, so that complicates things.
Yup..let's stick with what we got Bill -you know I tend to dance around problems throwing out all sorts of possibles before honing and focusing in on what needs to be done...and still get it wrong!It's your call Jez ,
But I can't agree, If anything I would go smaller Carb',
Can't see what you would get going bigger,
I thought we agreed, Rev's is NOT what we want ?,
Your piston speed would be too high ?.
And the air to petrol ratio , You would need even more petrol with a bigger carb' ?.
Peter is talking about that thing with an aircraft engine, Have you heard it ?.
He only rev's it to a few thousand !, You can count the bangs as he pulls away !.
Heat can be made if the ign's is too high or too low,
There is only one way to find out,
As long as you know the advance is working right , I would retard it 2 degrees.
But we also know it was as WEAK as hell with the carb',
Partly my fault, The way amal britbike gives us settings , For carb's, Not Bikes !,
I thought , They would be in the "Ball Park ",
They was Spot on with my Mk2 Amals, Which I was shocked about !,
So until that is sorted, it's hard to know what to do , "To Me ".
Your call , I am just guessing, I can only say what I would do.
Funny , I have never had pinking with a Vincent, And I have had SO many different Carb's,
On my bikes,
I even tried Strongbergs Off a car, It ran SO smooth slow running, Twin Vin',
But with the rev's It wouldn't keep the slide up !,
They had a rubber Diafram and the slide worked by air pressure,
Often thought of running one carb' between the two cylinders,
Or 2 carb's with a link pipe !.
But never got around to it.
Your entry to the conversation, or whatever this thread has now become is most welcome, especially when bringing info like that at the right moment to the party. Had read it before when researching the carb originally before deciding to buy it, but had gone completely out of mind -knowing more about it, that thread absolutely more relevant now than then.The title of this thread didn't seem relevant to me so I'm only looking at it now for the first time, as a result of Bruce's post causing it to be flagged. I've not read all 72 pages of the thread (or even 71 of them...), so I apologize if this has been mentioned before, but 1000-series Concentrics were constructed for 2-stroke use, and it's not just simply a matter of substituting a few components to get them to work well for 4 strokes. See the following thread for full details on modifying a 1036 to work well on a Gold Star:
Jetting a 1036 (or 1038) Concentric
Note: because of the 5 images/post limitation this will be spread over four posts. Jetting a 1036 (or 1038) Concentric for a Gold Star Charles Falco Background: The 1½" AMAL GP supplied on Clubman Gold Stars has an almost unrestricted bore for flowing large quantities of air s...www.britbike.com
A thorough and in depth review of these concentrics -absolutely invaluable if owning one, this has really helped.The title of this thread didn't seem relevant to me so I'm only looking at it now for the first time, as a result of Bruce's post causing it to be flagged. I've not read all 72 pages of the thread (or even 71 of them...), so I apologize if this has been mentioned before, but 1000-series Concentrics were constructed for 2-stroke use, and it's not just simply a matter of substituting a few components to get them to work well for 4 strokes. See the following thread for full details on modifying a 1036 to work well on a Gold Star:
Jetting a 1036 (or 1038) Concentric
Note: because of the 5 images/post limitation this will be spread over four posts. Jetting a 1036 (or 1038) Concentric for a Gold Star Charles Falco Background: The 1½" AMAL GP supplied on Clubman Gold Stars has an almost unrestricted bore for flowing large quantities of air s...www.britbike.com