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post #1 of (permalink) Old 08-21-2001, 08:27 PM
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power core iv?

how much quieter is the power core iv Q then the oriqonal power core iv? i jus got a 400 ex with a pc4 on it and was wonderin if it was worth $44.99 th get the quiet core for it
<the nieghbors dont like how loud it is>

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post #2 of (permalink) Old 08-21-2001, 08:56 PM
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Re: power core iv?

Why do you want it quieter?? You could repack it, IF IT IS repackable, i don't know if it is or not, i know repacking works pretty good.


<font color=blue>UGH, I HATE WHEN THAT HAPPENS.</font color=blue>
post #3 of (permalink) Old 08-21-2001, 09:08 PM
 
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Re: power core iv?

dude sadly noise pretty much means power so if its quieter its gonna not give as much power...all depends what you want and can get away with...i could blow of dynamite where i ride and no one would care (unless i ruined a trail hehe) but i know some people hafta have it quiet...oh i guess that didnt answer your question really hehe...im not sure how much the quiet core will help i know on the 300exs mega max 2 without the disk in it it is way loud and powerful...but with the disks in it is bearably quiet but noticeably wimpier in power..

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post #4 of (permalink) Old 08-22-2001, 11:38 PM
 
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Re: power core iv?

noise and power do NOT go hand in hand.....2 strokes run on a basis of back pressure....the louder does not mean the more powerful....the reason it may be marked with the Q may be for an added silencer on it....many counties now are going with decibal bans....i almost got a ticket for too high of decibals.....that is all.....i would go with the quiet one myself....


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post #5 of (permalink) Old 08-23-2001, 08:39 AM
 
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Re: power core iv?

on a four stroke noise usually means power though because the pupose of a pipe is to get the exaust out as fast as it can...right?

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post #6 of (permalink) Old 08-23-2001, 03:30 PM
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Re: power core iv?

There are a lot of things that go into a good system but my understanding is that you are looking for is a system where the back pressure shuts off the exhaust flow right as the valves close (or piston closes the exhaust port on a two stroke) and then has released all the pressure by the time they reopen. Without back pressure to stop the flow, fuel mixture starts going out the exhaust reducing power and burning stuff up. The more you junk can get out of the cylinder in this short time period the better. This can be done with a quieter system, just not cheaply. When you start getting into more than one cylinder it gets much more complicated because you can start using the flow from one cylinder to suck on another (like a waterbed pump). Thats why on a 4 cylinder bike a 4 into 1 works better then a 4 into 2.


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