Messages

1

Technical / Re: Why dual stage reeds

« on: October 27, 2010, 04:34:31 AM »

Now we are talking
I like to hear all different teories. But a few more questions start to come up in my head.

1. Why do you need to jet differently with a dual stage read? It is after all just a "backvent" that prevent already mixed gases to go back through the carb!?

2. The larger the hole in the bottom reed. the less will the bottom reed open. Have not Boysen now a smaller hole in the bottom reed than before? To make the bottom reed open more(or at all).

3. I heard a roumor that most pro uses really soft reed that will need frequently replacement, anybody else heard this?

2

Technical / Re: Why dual stage reeds

« on: October 20, 2010, 06:18:28 AM »

Thanks for clearing things up 

3

Technical / Re: Why dual stage reeds

« on: October 19, 2010, 09:43:04 AM »

Hi,
The tricky thing is that at medium rpm when the bottom stiffer reed starts to open, will they immideately open together or will the soft one open more than the stiff bottom? If the dual stage tech actually work they have to open together, because if the soft one opens more than the bottom one, the dual stage tech is not effective at high rpm. Does this make any sense?

4

Technical / Re: Why dual stage reeds

« on: October 19, 2010, 09:07:25 AM »

This is what I am curious about. How can it react faster than the weakest link at high rpm?? I mean the soft reed petals also needs to close: Or are they thogether when they both are open at high rpm? Anybody got a clue?

5

Technical / Re: Why dual stage reeds

« on: October 19, 2010, 03:54:48 AM »

maybe becouse the distance between the reeds its bigger

and it alows the fuel mixture to get in easyer

As far as I know it would have the opposit effect?

6

Technical / Why dual stage reeds

« on: October 19, 2010, 02:08:57 AM »

Hi!

A question for all engineers and others with great knowledge.

Why will a dual stage reed, like boysen, work better than a single one?

I can understand the benefits of the V-force since it has twice the area the reeds only needs to open halv the distance and they will therefore be quicker to close. You can use a softer reed for max bottom end and still it will be quick enough at high rpm. It also has a straighter intake path.

But how on earth can a dual stage reed be of any benefit at all? Please can someone tell me?

Thanks a lot
Mattias