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Thread: Air Filters - Stock vs Aftermarket, and Airbox Resonance Reply to Thread
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  Topic Review (Newest First)
Jun 12th, 2018 1:52 am
xracer
Quote:
Originally Posted by DonaldDuc996 View Post
This is what I did....total cost $4.30.
Runs great and acceleration is better then it has been in years.

Go figure. ?
When youíve done a lot of dyno work you will see how wrong your statement is. Seat of the pants dynosí donít work.
Apr 25th, 2018 7:01 pm
Made_in_323 [QUOTE=DonaldDuc996;5686945]This is what I did....total cost $4.30.
Runs great and acceleration is better then it has been in years.

Hi there,

I came to the same conclusion and i think i will do just that. What kind of foam did you buy?

Many thanks.
Sep 10th, 2016 7:33 am
Warp Racer DNA filters (they look like a K&N design) on my 999S
Mar 13th, 2016 5:59 pm
DonaldDuc996 This is what I did....total cost $4.30.
Runs great and acceleration is better then it has been in years.

Go figure. ?
Feb 25th, 2016 4:50 pm
DonaldDuc996
Quote:
Originally Posted by rockk View Post
i plan to purchase an over the stack filter, pipercross, any chance u can post a picture with the "cage" u made to hold up the filter?
I would prefer these but not at the expense of a ton of other adjustments. Just not that tech savey.

Aug 10th, 2013 10:12 am
rockk i plan to purchase an over the stack filter, pipercross, any chance u can post a picture with the "cage" u made to hold up the filter?
Dec 18th, 2012 6:04 am
TomTom Regarding post #1.

Quote:
All of this tells us why Ducati places the superbike air filters in the air runners. This location avoids lowering the frequency of the airbox (by not filling up a large portion of the airbox volume with a bulky foam filter) and prevents disturbing the airflow near the velocity stacks as well as improving throttle response by maintaining a large free air volume between the filter location and the velocity stacks.
I beg to differ, reason being real world tests (by myself) which proves these assumptions not valid.

Imo the negative power results from over the stack filters are from the filter collapsing on the stacks.
Now, with a cage inside that filter holding it up there is no loss at all at any part of the rpm range.

So that means:
-The resonance is not disturbed by filter material inside the box
-Flow is not disturbed by a filter in that position
-There is enough air readily available
-Fuel mixture is unaffected

What I did for testing was dyno and map each:
-Without any filter
-Overthestack cage-inside-type filter (MWR)
-Overthestack NO cage filter

Without filter and MWR were identical powerwise from start to end, not a single hp difference anywhere and identical AFR.
Overthestack NO cage filter lost 7hp(remapped to fit) to the other two.

After this test Ive done the No filter/MWR test a couple of more times with the same result.
Oct 26th, 2011 9:55 am
pcoakle1 nice write-up. Good lunch read...
Apr 5th, 2010 6:47 pm
jsrussell
Quote:
Originally Posted by ccemn1 View Post
I agree that Ducati, like most major MC companies has millions invested in R&D, but the fly in the ointment is; a lot of that R&D goes into making these bikes able to meet European & US EPA standards, which have nothing to do with effeciency, or performance!
agreed
Jan 9th, 2010 8:57 am
ccemn1 I agree that Ducati, like most major MC companies has millions invested in R&D, but the fly in the ointment is; a lot of that R&D goes into making these bikes able to meet European & US EPA standards, which have nothing to do with effeciency, or performance!
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