Thunder Products

Update here, used the bike at a track day yesterday in amongst late model sport bikes, absolutely no issues with the way the Mk 1 Premiers and std manifolds are set up, so will leave well alone until Mk 2 Amals become available. Have another complete set up I can try of the Premiers with JS Motosport head side manifolds and have fabricated up a flange and tube at the carb side , so will do tests with that instead
Thanks for all the replies, positive and negative
Regards Mike

Is this the bike with the supercharger or just carby? Maybe a flat slide pumper would be better with elevation changes.

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Yes Ms Peel that lives in my living room almost a decade now. I've read up on Lake Injectors which were widely used along with a few other very similar gravity fed nail in a tube metering, cycles to air craft and they worked a treat - after the needle profiled to idle and work upper range.
I will need blower power for track day elasped time proving but i don't like the Drouin hanging out so am keeping other non boosted fuel delivery in mind for normal use w/o risking spin out and crashing on it, like from goats and deer and dogs and logs going so slow no engine power even needed then. Bruce McGregor has put a flat slide carb on his Drouin that worked well most a decade now so don't have to re invent the wheel.

Glad to read the good ole Amal are pleasing on tract days.

hobot said:

I will need blower power for track day elasped time proving but i don't like the Drouin hanging out so am keeping other non boosted fuel delivery in mind for normal use w/o risking spin out and crashing on it, like from goats and deer and dogs and logs going so slow no engine power even needed then. Bruce McGregor has put a flat slide carb on his Drouin that worked well most a decade now so don't have to re invent the wheel.

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I was thinking a flat slide carb with a pump. Might not have been clear about it.

Something like this:

http://www.ebay.com/itm/New-Mikuni-Flat ... 565a6caba1

dennisgb said:

I was thinking a flat slide carb with a pump. Might not have been clear about it.

Something like this:

http://www.ebay.com/itm/New-Mikuni-Flat ... 565a6caba1

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Nah, that'll never work.
Oh yes it does.

pete.v said:

Nah, that'll never work.

Oh yes it does.

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Wish I had bought a pumper...but at least I have a flat slide.

Thanks for the pointer Dennis, as I do like accelerator pumps but I've built myself into a couple corners on Peel, alternator got squeezed out of the primary to behind barrel and it likely prevents a vertical side draw carb to fit. If I get creative with long manifolds maybe could but don't have to cross that bridge yet whoose ends may not line up in the middle. A hopped up Commando engine should make tire spin routine concern to avoid or use. I sometimes picture a small carb on one side and a 38 mm pumper on the other linked sequentially.

Matt Spencer said:

" At full throttle this twin choke AVT 40 SU Carburettor would feed the 27 litre V12 Merlin with 4 Gallons a minute, or a litre every 3 seconds of 100 octane aviation fuel ."

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Now that's a carburetor !

pete.v said:

dennisgb said:

I was thinking a flat slide carb with a pump. Might not have been clear about it.

Something like this:

http://www.ebay.com/itm/New-Mikuni-Flat ... 565a6caba1

Click to expand...

Nah, that'll never work.
Oh yes it does.

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I think that RGM are working on coming up with their version of that kit.

chasbmw said:

I think that RGM are working on coming up with their version of that kit.

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I will be interested to see how they notch out the frame webbing.

Biscuit said:

Matt Spencer said:

" At full throttle this twin choke AVT 40 SU Carburettor would feed the 27 litre V12 Merlin with 4 Gallons a minute, or a litre every 3 seconds of 100 octane aviation fuel ."

Click to expand...

Now that's a carburetor !

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And the V 8 engine only revs to 3,500 rpm :!: :?