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Post by Ronan Alves on Feb 16, 2012 22:07:03 GMT -5
Hey guy... How are you? I bought a Koso Titanium Manifold to my Aprilia SR, but i have some doubts. The manifold came with the red part (26mm hole) to put inside of the block? we need to put this, for what this use? The manifold came with two different reeds, one to use with the metal stoppers and another to use without the stoppers? like the malossi block... what is the difference to use with or without? I made a research to know if we can use without the stoppers and i found a malossi reed valve block.. look the explanation: "the reed valve block from MALOSSI MHR shares the same qualities as the other leading manufacturer: higher cylinder fill, optimized fuel flow through enlarged diameter, carbon reeds, rubberized gasket, and the venturi element. MALOSSI has included a venturi element specially for high torque cylinders to optimize the fuel flow. The MHR reed valve block doesn‘t have stoppers for the flaps, getting you optimal cylinder fill with top rpm‘s. The reeds come in one piece, without slit."koso  malossi  i want the best performance, i only use my scoot to having fun on the weekend, wheeling speed... anybody can help me? |
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Post by stepthrutuner on Feb 16, 2012 22:29:48 GMT -5
This is my understanding of the subject. The orange objects are called stuffers. They are supposed to provide better instantaneous throttle response by keeping the speed of the inducted mixture consistent with that emerging from the carburetor outlet. The one you use should have a passage diameter just slightly larger than your stated carburetor's diameter. The stopless stiffer reed should be better for high speed running with a slight loss of power at low speeds. The thinner reeds with stops should work better at low to medium rpm. Probably you will want to experiment with many combinations to get the response and power that satisfies you the best. You may leave the stuffers out also if you wish. Like I said run the combination that feels best to you for how you ride.
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Post by jmkjr72 on Feb 16, 2012 22:47:09 GMT -5
if you are running less then a 24 mm carb you want a stuffer to keep the volicity of the charge up
the smaller one is for up to 21 and the larger one is for over 21
if you dont flow large masses thru a ver large carb you need to flow fast to get the right volume
if you have a screamer 12grand + then i would use the thick reeds no stoper if not then i would go with the thiner and the stopper
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Post by lshigham on Feb 17, 2012 5:37:15 GMT -5
In theory you are both correct about the stuffers - however, Andy from PedParts has tested a reed block with and without the stuffer and couldn't tell the difference even on a dyno! So - you can do whatever you want with it really!
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Post by Ronan Alves on Feb 17, 2012 8:07:46 GMT -5
how i talk to andy from PedParts? He is our frind here in the forum?
I like to do wheeling.... do you think its better put the stoppers to make this?
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Post by Ronan Alves on Feb 17, 2012 8:24:58 GMT -5
to have a good power at low and medium rpm..
what i put... a thiner reed with the stops and the stuffers?
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Post by stepthrutuner on Feb 17, 2012 9:39:48 GMT -5
In theory you are both correct about the stuffers - however, Andy from PedParts has tested a reed block with and without the stuffer and couldn't tell the difference even on a dyno! So - you can do whatever you want with it really! Since the rider is continually on and off the throttle stuffers prove advantageous in motocross probably more than any other venue. Road racing would be second. There would be little advantage in drag racing as the rider learns throttle/drive train response and times throttle application to his best judgment of the tree. Of course clutch preloading and brake release can become involved as well. There is no additional power to be gained from using stuffers, just improved throttle response. |
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Post by Ronan Alves on Feb 17, 2012 10:46:59 GMT -5
In theory you are both correct about the stuffers - however, Andy from PedParts has tested a reed block with and without the stuffer and couldn't tell the difference even on a dyno! So - you can do whatever you want with it really! Since the rider is continually on and off the throttle stuffers prove advantageous in motocross probably more than any other venue. Road racing would be second. There would be little advantage in drag racing as the rider learns throttle/drive train response and times throttle application to his best judgment of the tree. Of course clutch preloading and brake release can become involved as well. There is no additional power to be gained from using stuffers, just improved throttle response. ok.. i will put the stuffers, and how about the stop... for low and medium gain, acelleration i put thin reeds and stopers? look this other reeds that came with the kit... for what i use this?  |
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Post by stepthrutuner on Feb 18, 2012 22:24:05 GMT -5
The open element (stiffer) reeds are made to work in conjunction with the solid thinner yellow petals. They mount underneath the thinner ones to produce a dual stage effect for benefit at both high and low speeds. At low speeds the thinner outer ones mainly only open and keep air velocity up due to the reduced flow area. The more forceful induction velocity at high speeds opens the stiffer one underneath as well to control flutter (bouncing) and provide more flow area.
I still suggest you experiment with different configurations to arrive at the set up that you like the power delivery from the best. You can try different set ups with the spacers which go underneath the cage flange as well.
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Post by 2strokd on Feb 21, 2012 10:14:48 GMT -5
I had the best luck using that combo...
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