Best EVER Amals

I just updated my post on the Classic posts regarding my on going saga of my T150v

I paid < $500> to have my stock Amals and mount gantry renovated ~

(There is I thnik a comprehensive list of modifications and improvements that Bob did for me on the Trident post earlier, done some time ago ~ )

Finally got a fuel return for the recent Classic Restorers club rally in Far North QLD.

This was the first time I have done a comprehensive total on ANY of my bikes but I was keen to see if the investment in the Amals was worthwhile ~

(Precision built by a retired engineer and mate who is a wizard on ALL things fuel delivery/ systems ~ I was sworn on a case of Boags Premium not to play with them but only adjust air and idle screws!)

First stage test down the ranges to sea level ~ I was stunned ~ 77 MPG! :shock:

Return to the Moun-tain top and overall fuel consumption ~ 4 litres per 100K / 60 MPG ~ 8) :wink:

I'm stoked as anyone with knowledge of the BSA / Triumph triples knows a very good day on stock carbs will get you < 35 mpg> ~

But this is perfect demonstration of what can be achieved with even the humble concentrics ~

I gas flowed the head in the restoration stage and the bike starts, run and idles as sweet as honey !

Remarkable results!

My T150 did great service touring the UK with my future Wife and heaps of luggage - if it returned 30 MPG I was pleased!

It'll be interesting to see how the new Burlen/Amal Concentrics perform with the revised pilot circuit - anyone in a good place to comment?

Talking to a guy a couple of days ago who fitted a single concentric with no filter to his 850 MkIII, and he was getting another 10MPG over his mate on a bog standard one, and he didn't feel that he was disadvantaged over acceleration either - prolly a function of the lack of air cleaner - he felt the K&N he'd originally fitted didn't suit the bike at all well.

Stuart SS said:

I just updated my post on the Classic posts regarding my on going saga of my T150v

I paid < $500> to have my stock Amals and mount gantry renovated ~

(There is I thnik a comprehensive list of modifications and improvements that Bob did for me on the Trident post earlier, done some time ago ~ )

Finally got a fuel return for the recent Classic Restorers club rally in Far North QLD.

This was the first time I have done a comprehensive total on ANY of my bikes but I was keen to see if the investment in the Amals was worthwhile ~

(Precision built by a retired engineer and mate who is a wizard on ALL things fuel delivery/ systems ~ I was sworn on a case of Boags Premium not to play with them but only adjust air and idle screws!)

First stage test down the ranges to sea level ~ I was stunned ~ 77 MPG! :shock:

Return to the Moun-tain top and overall fuel consumption ~ 4 litres per 100K / 60 MPG ~ 8) :wink:

I'm stoked as anyone with knowledge of the BSA / Triumph triples knows a very good day on stock carbs will get you < 35 mpg> ~

But this is perfect demonstration of what can be achieved with even the humble concentrics ~

I gas flowed the head in the restoration stage and the bike starts, run and idles as sweet as honey !

Click to expand...

Been following these "MPG" threads for awhile now ... and I am very impressed ! So impressed, I would like to buy a set from this engineer genius. I had a T160 about 7-8 years ago, best I ever got was about 27 MPG. In fact, the poor MPG was why I sold it. SO ... thanks for sharing StuartSS, and how do the rest of us get these "super MPG amals" ???

Wat's aT150??????

The trouble with really, really low fuel consumption is that it invariably means the mixture is at the lean side of things. Might be ok for flatlanders but here in BC we have great honking big mountain grades that go for miles. True, things go richer as you elevate, but sometimes the leaned out bikes dont make it all that high before a piston squeaks tight from heat of the extra lean burn or holes out on top from same.
I would rather put a little more fuel in!

Glen

Wat's aT150?

Click to expand...

WornTorn

I hear you loud and clear ~

But t he tests are in~ and Bob as I reported in Classic link , is a retired engineer and there is little that he does not know about fuel delivery systems and all things metallic, and more!

His extensive tests gave a return of 65MPG!

I got 59.4 MPG overall on a 500 km run from 800 metres above sea level to the coast and back ~ And the vital key there has been no discolouring of header pipes which would suggest or indicate overly lean / hot mixtures ~

Ok, I "got's to know ... how can I get a set of these "super MPG" Amals ??? :shock: My 1971 Triumph TR6C (with low pipes and later tank) is getting 53 MPG. Very happy about that too.



However, the Nortons I've had over the years has varied from 34 MPg to 54 MPG. They either had single 34mm Mikunis, or the original dual Amals. The worst, was a 1971 750 Commando; my first Norton.

Ok, to get back on track ... please share how the rest of us can get these "super MPG Amals" , anxiously waiting ...

nortriubuell

I know a few blokes that are keen to access these carbs.. But having talked to Bob about this issue as he has a second set of my carbs and linkages.

Davamp ( on site) also asked me some time ago as to whether he can get a set built fo rhis Commando~ as he is in Ozzie too~

Bob was perplexed as to why I would want two sets ! As he guarantees they will never wear out.

And he is a retired engineer and a new fan of the Britosh triples ~ but having said that he is advising the keen to wait for the new Amal 2012 concentrics to appear as he has talked with them direct and he feels the trick bits the Amal folk are putting in will be the equivalent of his rebuild.

Of course the results are yet to heralded as it were ~ And the new wave parts which will be resilient to the crap they call ULP fuel is also an issue ~ So I guess we can only wait and see ~

But in short Bob is always tinkering ! For example he is now doing me a set of S/S tube nuts (4) for the rocker covers on my Trident ~ He also builds custom push rod tube seal holders for the Tridents but these for example are <$80 AUD> for four which is pretty expensive.


All his stuff is custom ~ and the 626 Amals I think he has only done three sets including one for me !

But in short I reiterate he is waiting to see the new Amals and the components that they are making ! .

Hi Stuart,

What pipes do you have on your Triple? I have a 73 T150 and never liked the long stock pipes. Your pipes look very similar to the pipes on my 1968 Bonneville. But I know the diameter on the T150 header is much smaller than the the diameter on the 1968 Bonneville. Where did you get them, price, and do they bolt on using the stock mounting points? And importantly, how do they sound compared to the stock pipes??

Stephen Hill

ps, I guess this has squat to do with Nortons, and somebody is going to get letter......

Triumph made a "BEAUTY KIT" for the trident back then and that is what his bike may be sporting....

The beauty kit consisted of a tank, fenders and exhaust to look like a Bonneville.



Tim_S

Hey Blokes

The pipes on my T150V are Viking Exhausts aka Paul Byrant in NZ ~

http://www.vikingexhaust.com/

These are "Big Bore (One piece) exhaust. They are are the correct size to accommodate the T120 1 1/2" pipes ~ Being one piece they are a bugger to fit and one has to remove the oil cooler to fit them. Another downer is that the exhaust headers have to be dropped off the spigots to remove the primary cover too~

They fit directly onto the standard spigots~

I can't really comment on whether they are an improvement as I gas flowed my head anyway ~ but- they are verging on a straight through system ~ which remains some what of a debate between those in my/ our circle ~

The original Beauty kits T150 of 1970 actually ran BSA A65 Lightning mufflers which I am told have a slightly increased resistance and thus back pressure ~






The cost of the headers was <$650 NZD> .

Amals always did deliver good mileage. There are mysterious aspects to them, I suspect having to do with ratio of jet to the surface area of the fuel in the float bowl; back in the day, to me, they seemed to be more tolerant of elevation changes than the Mikunis. Crazy, I know, just an old opinion/observation.