Triumphrat

Confused

Ok I'm living up to my nic again. I've seen statements like "snorkel removed", air box drilled, "thunderbike pipes".
:???:
Drilling the air box I understand would allow more air into the stock air box, then the only air intake restriction would be the filter, which should remain unless you really enjoy cleaning carbs.

Thunderbike pipes is that a brand name, or a tag line for Triumph Off Road silencers?

*** is a snorkel, where the F is it what is the supposed purpose? :???:

Be patient I'm a fast learner.

Keith

dazco

Thunderbike is a bike shop in Austrailia that has pipes and some other products made for the triumph line. So yeah, a brand name. I have them, like em.
Snorkel is a rubber nozzle under the seat which plugs into the top of the airbox. You can grab it and pull and it pops out. Pops right back in too, tho you probably won't want it back in. It restricts airflow quite a bit. Thunderbikes did a dyno with and w/o the snorkel and actually shows a 2 HP improvement !

Once the airbox is drilled the filter is NOT the remaining bottleneck. there is a wall between the filter and the carbs called the "restrictor plate". On the cruisers this wall is a molded part of the airbox and cannot be removed w/o cutting it. Stock, the plate has 2 holes about the size of golf balls that is the only route from the filter to the carbs. Thats where the bottle neck is once you use a UNI or K&N filter and drill the box at least. It may not be the main bottleneck if the filter and box are completely stock. thats speculation tho. It has been said by some bonnie owners tho that removing the plate (bonnie restrictors are a seperate part and removable) actually decreases performance due to the design of the box being changed to a point where airflow is negatively changed even tho it's less restrictive. Some say it does improve it. Too many variables to say for sure i suppose.

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2005 Speedmaster, Neon Blue, Thunderbike pipes, snorkel removed, UNI filter, drilled airbox, 130 mains, TBS needles.(2 shims) And speaking of Speedmasters, HERE'S MINE

rwright

Upgrade the filter to either a K&N or UNI. Better performance and less restrictive plus they can be cleaned, oiled and reused.

Thunder Powersports (not the HD site "Thunderbike)
http://www.thunderbike.co.nz/

My opinion on the snorkel is that it serves two purposes, 1st since its opening faces toward the rear of the bike, pulls in relatively quiet air, as opposed to facing forward and becoming a ram air. 2nd its length (down through much of the filter column) may have been intended to restrict intake air to match or be in tune with the restrictive exhaust. You can pull the snorkel and gain more intake but unless you're ready to start with other mods such as pipes, carb jets, air/fuel mixture adjustment I wouldn't recommend it. I saw a decrease in performance and lean running condition when I did.

Just my 2 cents.
Richard

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dazco

Yes, that can happen if the bike isn't ready for more air, IE: no pipes or jetting changes etc. For me, just pipes were enough. They say they are lean from the factory, but for whatever reason i saw a nice increase when i removed mine. Certainly tho w/o at least pipes the bike would surely not benefit and probably see results like yours.

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2005 Speedmaster, Neon Blue, Thunderbike pipes, snorkel removed, UNI filter, drilled airbox, 130 mains, TBS needles.(2 shims) And speaking of Speedmasters, HERE'S MINE

Confused

Thanks guys

Keith

patriot604

Just a little nudge about this as the Kiwi's really don't like be called Aussies. New Zealand is not part of Austalia...

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