Well im home

1.It was a great weekend

2.It was colder than i thought god allowed it to get

3.There was a ton of testing done in a small amount of time

4.I enjoyed meeting 222,MRHP,BOM and a few others Some things you don't admitt

5. To sum up my trip my plane ticket was 670.00 dollars rental car 125.00 hotel 225.00 WINNING A FEW THOUSAND DOLLARS IN ILLINOIS ON THE RIVER BOAT CASINO "PRICELESS"[img]i/expressions/face-icon-small-happy.gif[/img] My trip was free!!!!!!!!!!!!

Later guy's its been a long day[img]i/expressions/face-icon-small-wink.gif[/img]

 

Well over two months ago I began running the snorkle set up after hearing that the dyno proved it was worth more ponies than just the clamp-on filter. I do a lot more than just straight line drags. My next door neighbors have a fairly brutal mx track that I play on every chance I get. Lots of jumps and whoops. Duning is my favorite...dragging is just for kicks.

I think the snorkle is pretty well held in position by the seat and frame as I have yet to notice any stressing or cracks where the snorkle meets the carb. I initially thought the same as you, OuterLimit, and I don't think it's a bad idea to have an aftermarket snorkle that is bolted to the frame and doesn't need the hose clamps because I won't argue that it's possible that some fatigue is taking place and there is the potential for the boot to crack and bad things could happen if not noticed before sucking in dangerous (any)amounts of dust.

...good discussion.

Jim

 

I plan to take a better look at the airbox on this ATV. Maybe it is possible to mount the carb snorkel to the front of the airbox, with the airbox still bolted down, but remove the sides and back half of the airbox so you have the same effect as just the K&N on the snorkel, but a more secure mount. I safety wire my swingarm lock nut, motor mount nuts, and everything else I can find on the ATV to make sure they stay put in a race, so it makes me nervous to just have a filter "dangling" on the end of a snorkel. Although I'm probably just being paranoid and over analyzing again (I do that alot).

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And speaking of over analyzing ...

Is it just me, or did the most obvious test with this shootout not get done? The stock bike with stock intake manifold and no exhaust mods at all made within 5 HP of the Lectron 46mm carb, and intake snorkel mod, and exhaust mod. So if the exhaust mod itself is supposed to make 4 to 5 HP, and the intake snorkel mod is supposed to make 2 to 4 HP, then how much HP did the carb really make? Why didn't you do the exhaust mod and intake snorkel mod to the stock carb equipped DS650 and test it with the stock carb before switching carbs. If you add up the numbers you would think that you could have had more HP with the stock carb and the exhaust and intake snorkel mod than you got by adding the high dollar Lectron (or TM45) carb.

I'm just playing devil's advocate here, ... and not trying to ruffle any feathers, but I would have expected more from the carb than it looks like you got.

 

i'd like to see dyno results of a 48mm and 50mm single carb, and dual 39mm or 40mm carbs. i'd guess that the 48 or 50 mm carb or duals will be better for anything other than a stock DS.

i'm running a dual 40mm throttle body on stock motor and would never go back to a single less than 48mm.

 

i've seen the same kind of airbox results with the turbo setup. with no unrestricted airbox/volume for the throttle body to draw air from, the power suffers. i've found that the closer the airbox is the better. currently i have a tapered airbox around 3X cylinder volume with a 3" diameter outlet right above the rear shock mount. i run a 3" pipe from the airbox to the dual throttle body. see pics in my image station album. for the case of a turbo, the airbox is smoothing out the pressure fluctuations and is also reflecting pressure waves off the back of the airbox that arrive at the intake valves at a particular RPM. The waves add constructively at a particular RPM.

 

I don't quite understand the theory behind the hose clamps on the snorkel to prevent it from collapsing. Wouldn't the clamps only keep it from expanding? Could someone explain.

Thanks.

 

It jiggles when it vibrates creating a disrupted air flow. It does close. Just thinkg of sucking very hard through a straw. It can go flat and stop airflow or change the direction of the air. The clamps dont allow it to disfigure and STAY round.

 

OK I am a little confused here, run the snorkle with out the airbox or with the air box [img]i/expressions/face-icon-small-confused.gif[/img]

 

I run mine with the air tube(snorkel) and without the airbox.

 

Az, glad you had a good trip and thanks for being a objective observer. What did you think of the carbs? I would like to hear what you think and what you would have changed.

See doing a service paid off in the end. Nice to hear you werent out of pocket any money.