Replacing Intake/box with aftermarket filters.

[jonathan180iq]

Originally Posted by blaine

Also changing from a factory filter to a aftermarket filter is much less drastic than switching to a open pod filter.
:cool:

Ineed.

[geezer]

jon where do you get your info? you had a gz on the dyno to compare intake to exhaust? lol cmon man, maybe im being alittle to simple minded here but for the intake you have a carb throat and a few inches of diameter ruber boot to the airbox. then ther is a filter. i had the muffler off my bike and you cannot see even a hint of light shine through it.

[jonathan180iq]

Which causes the larger problem?

(A) pin hole in your intake system

(B) 1/4" hole in your muffler?

If you chose (B), you are incorrect.
The very fact that the intake tract is so small and precise, as you mentioned, means that any changes to this part of the system results in exponentially larger change to the bike as a whole. The exhaust system, in contrast, is designed to operate under a wider range of scenarios and thus, can handle more variables than the intake system.

As I said before, if you had a lot of experience dealing with motorcycle exhaust systems, you would know that there is a difference between factory exhausts and aftermarket exhausts and that difference does not come primarily from the muffler. Mufflers are little more than sound suppressors. It is through increased header diameters and flow capabailities that the largest differences occur. THAT is why many slip-on muffler manufacturers will quote on their boxes that slip-on mufflers may not require a re-jet. You will not find a full system manufacturer that will make that statement. And it has nothing to do with being able to see light through the end of the muffler. (Ever look through the end of a flowmaster? (Varies depending on model) Can't see light there either. How about a set of Cobra drag pipes? No light.) Even the high end mufflers all filled with baffles and angled pieces and insulation to direct air flow so that a certain tone is achieved.

Cutting off your head pipes and slapping on universal fit muffler is, in essence, simply creating your own slip-on. And it may very well require a slight rejet. But it will need much less work than if you make even a slight change to the intake system.

Do it. I promise you will experience the same thing.

[geezer]

so your basis for arguement is the intake ha a more dramtic affect on things due to the size of a hole thats not there? fine i give up

[alantf]

Originally Posted by geezer

i had the muffler off my bike and you cannot see even a hint of light shine through it.

Muffler plus pipe = curved.
light travels in straight lines.
That's why you can't see through it.
Q.E.D.

:crackup :redflip:

[geezer]

yeah no duh alan!! damn you! i still cant belive thsi guy thinkbecous a hole in the intake is worse than a hole in the exhaust that makes it more restrictive. ever stop to consider that its not just air going throu the intake? fuel metering is why the intake has to be perfect and you can get away with a huge hole in the exhaust. and besides i hope your not basing all your "info" on the gz.

[blaine]

Originally Posted by geezer

fuel metering is why the intake has to be perfect and you can get away with a huge hole in the exhaust.

That is exactly the point jonathan was trying to make. :??: O_o
Quote:
Which causes the larger problem?

(A) pin hole in your intake system

(B) 1/4" hole in your muffler?

If you chose (B), you are incorrect.

[geezer]

nope, i was talking about what part of the bike is more restrictive and he goes and tells me about holes and stuff. NEXT

[blaine]

Originally Posted by geezer

nope, i was talking about what part of the bike is more restrictive and he goes and tells me about holes and stuff. NEXT

geezer wrote:
fuel metering is why the intake has to be perfect and you can get away with a huge hole in the exhaust.

jonathan stated it,you wrote it,and I agree. :cool:

[geezer]

YUP you got it! but i was explaining thats probably why the intake is so much more effected by holes in it, another side of the arguement completely.