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Strange reed set up.

Tuning

 
 
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  #1  
Old 12-21-2009
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Default Strange reed set up.

So tonight I went and visited an old friend of mine who works as a R&D for Polaris. This guy is rated as one of the top ten American Motor Knowledge. When you talk to him you know it! Stupid smart. I walked into his shop and was absolutely amazed at all the race sleds and engines that he had. Now were not talking little twin crap. I'm talking 250-300hp machines on pump gas and no NOS.
So we got to talking about my huge 600 twin stalker and I asked him what I can do to help it out a litttle. This guy was great, he talked for an hour running numbers, sizes, dyno results and a whole plethora of things I should do. One of the biggest things that he said that struck me as a little odd was that V Force reeds are junk and a huge waste of monney. The Dyno results that he's done at Polaris on the 600 twin's showed absolutely 0 gain to using V Force Reeds or adding a Air horn kit.
What he said that works and "WILL" give you a honest 3-5 Hp gain was changing only the stock bottom reed peddle on each cage with a Carbon Tech (carbot fiber reed). I don't understand the theory of only changing the bottom and leaving the top reed peddle stock but he says that it is a proven fact that it works on the twin 600's.
To me this is great, I plan on trying this instead of buying an entire set of reeds.

Has anyone ever heard of this?

P.S. This guy's name is Barry and I belive everything he says. He has been in this business for longer than I've been alive and more than not hes has either designed or tested something in or on your Polaris sled.
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  #2  
Old 12-21-2009
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Rich, I'll split a set of reeds with you if you want to try this. That is if they are interchangeable top and bottom.
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  #3  
Old 12-22-2009
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interesting
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  #4  
Old 12-22-2009
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I've always been under this theory of thought.

Reeds don't add HP, they add response. Carbon fiber reeds and better designed reed cages don't allow the reeds to flex or bend. This gives a better air flow and faster opening and closing of the port. Better throttle response.
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  #5  
Old 12-22-2009
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some guy sent me a cad drawing of round reeds instead of the typical triangle. air flows around round things better than through square things.

also you have to take into account that on reeds, if you are looking at the carbs you are seeing spit back. the better the reed the less spit back. take your stock reeds and change the shape of the tip to reduce some mass, to you and me they are light as a feather, but when you think of the speed that the reed has to move back and forth that 1" a few hundreths of a gram could make huge changes in reeds.

I am working on a project right now with a guy leading the way that if it works out he is talking an engine that you can get rid of the reeds all together. with egt readings and hp levels that will blow everyones mind if it actually works. physics on paper are one thing.

patriotic innovations on hcs has patented a part that work with or instead of reeds that has greatly improved the engines response and running ablititys.
there are things happening out in peoples garages that guys with fancy degrees and unlimited budgets are overlooking or just not getting out of the conventional range of engine design far enough.
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  #6  
Old 12-23-2009
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I can understand where having 2 sets of reeds with different characteristics working together could have a dramatic effect on engine operation.
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  #7  
Old 12-23-2009
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give this to your guy rich, is it what he is thinking?
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  #8  
Old 12-23-2009
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The picture was a lil small Jon but I got the idea. Amazing design thought and impressive numbers if they are close to the actual specs but the entire logistics to this concept would truly be overwhelming. The material and durability off the reed would have to be second to none!
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  #9  
Old 12-24-2009
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I dont have any flow numbers or anything for that design. but in theory the round flows air better thans square.

like i said, my goal is to be having a sled running without reeds this winter? thats assuming i have a sled running this winter.
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in a time of deciet telling the truth is a revolutionary act. george orwell.

aint no body ripin like me. M to the a-d-c-o-w. rock it hard for my fly ladies. I rock it yes in deed. homies still roll with me. money dont change me


nothing goes like 3 holes.

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  #10  
Old 12-30-2009
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So if the VF reeds doesnt add much for a twin, what does it spell for us TRIPLES? WL.
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  #11  
Old 12-30-2009
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we know that when you tune a triple that you can see a little power.
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in a time of deciet telling the truth is a revolutionary act. george orwell.

aint no body ripin like me. M to the a-d-c-o-w. rock it hard for my fly ladies. I rock it yes in deed. homies still roll with me. money dont change me


nothing goes like 3 holes.

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  #12  
Old 12-30-2009
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It was stated in few times - in a stock motor, reeds do not help much unless you modified the engine. In my opinion, triples with dynoport pipes, and headcuts - may benefit me some to a degree. WL
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  #13  
Old 12-30-2009
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yep, its hard to feel 2-3 hp, but its there, no doubt that if you can open up the reed area you can get more hp, and if the reeds have to travel less distance you get better throttle response. and thats what v force do.
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If the boner police are here I need a lawyer.

in a time of deciet telling the truth is a revolutionary act. george orwell.

aint no body ripin like me. M to the a-d-c-o-w. rock it hard for my fly ladies. I rock it yes in deed. homies still roll with me. money dont change me


nothing goes like 3 holes.

BRTECH HOODS
high performance engineering
aaen performance
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