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simple request

Norton Models (not Commando or P11)

simple request

Postby seattle##gs » Tue Apr 04, 2017 8:01 pm

1966 Atlas...
I want a pair of intake manifolds that hold the carburetors level.

#2...I want a set of high pipes or a Siamese pipe.

Asking for too much?

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Re: simple request

Postby Rohan » Tue Apr 04, 2017 10:42 pm

Ask away - it will be interesting to see what turns up.

The 2-1 inlet manifold has the carb level.
But not sure I've seen anything like Commando style manifolds - but for an Atlas- like that, for twin carbs.
I had a local engineering shop fab up some custom manifolds recently (not Atlas),
I'm sure if you greased someone palms they could do you a pair. ?
Be quicker/easier with straight tubes and angled endplates than curved tubes though ?

Armours do siamese pipes for some models of dommies (early 1960s they were a factory option)
so whether they would fit an Atlas is an interesting question.
You tried the usual suspects - Walridge And do Rabers and BritCycle still trade ?

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Re: simple request

Postby seattle##gs » Tue Apr 04, 2017 11:22 pm

have not tried the usual shops. I have a Mikuni 2 into 1 manifold but I was considering duals if the manifolds were available. I could make them but I have a million projects to do. This is a P11 motor and trans in a Trackmaster frame and I am playing around with different ideas for pipes. Perhaps the P11 downswept pipes would look good. If I had some used pipes I could cut and alter. A siamese pipe would look really good

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Re: simple request

Postby Matt Spencer » Wed Apr 05, 2017 10:39 pm


In the CLYMER Commando manual , theres a ' tooning ' section .

The Pipes there are labled 1 3/4 bore ( 1 7/8 in. O.D. ) - plug in .
The Mega drawn I used , stock inter headers for primaries , secondary 2x X section area . Then the humungous Rev Con Mega . On the street .

Didnt seem to help the 2S Combat Cam , but the stock cam it pulled from idle to 7.000 . As quick as a excess 11 - fully wrung ( on a 4-1 ) .
on tall gearing .

Avealookat the Alex Jorgenson stuff here.
The Japanese response to ' styling ' , was to add more .
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Matt Spencer
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