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  #11  
Old 26-Feb-2005, 21:13
aka.eric aka.eric is offline
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I use Pipercross filters £19 from Demon Tweeks,advised by engine builders at a car manufactures in Crewe that reducing the volume of any air box is a no no.
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  #12  
Old 26-Feb-2005, 21:47
ducv2 ducv2 is offline
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Shazaam's graph looks like my power runs with and without an over the bellmouth filter. I was amazed at the power gain just by removing it (and it was clean) And the noise is justification by itself.
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  #13  
Old 27-Feb-2005, 00:44
Mr_S Mr_S is offline
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Quote:
Originally posted by geoff m
but I might lose one whole horse???

That's compared to no filters at all.

If you're running the standard ones at the moment the Pipercross ones flow a little better (allegedly) so you'll probably get an increase, and you're unlikely to see a loss.

When you buy the filters, you need to use the plastic cage from the original ones, so don't go throwing them out just yet. ( I had to scrounge some from a dealers bin )
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  #14  
Old 27-Feb-2005, 01:47
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deej deej is offline
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yep

i nearly got caught out with that 1 too, keep the black plastic covers
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  #15  
Old 27-Feb-2005, 10:25
Old Yella Old Yella is offline
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Piper cross for the 998.
Read loads of threads on here regarding this and thought it was the best way to go from standard.
Got mine from Cornerspeed, similar price to all above but you might get 10% if your a DSC member?
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  #16  
Old 02-Mar-2005, 00:10
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the old man the old man is offline
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I run an ITG in airbox filter (ie., it fits over the bellmouths) on my 996. This is a simple option on the 996 'cos it doesn't have shower type injectors above the bellmouth - 998's etc with injectors sited above the bellmouth make this type of filter installation a lot more fiddly.

This set up lost 2bhp over no filter at all (also running carbon air tubes without provision for filters) with no obvious dips in torque - just a gradual loss from about 6000 rpm upwards - and was chosen because I planned to race the bike and wanted protection in the event of a get-off (using the tank as the airbox top means an airbox full of gravel is almost guaranteed in any serious 'racing incident'). To my mind this should be a serious consideration for any track-day junkies.

I don't have any data comparing this set-up with standard filters - but if we assume standard filters will not be quite as good as no filter at all then realistically the in-airbox job is probably costing about 1bhp and I defy most anyone to be able to spot a <1% bhp change without the aid of a dyno!

Does muffle out some of that airbox noise though.
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  #17  
Old 03-Mar-2005, 21:27
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geoff m geoff m is offline
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Mood: So its raining, your problem with that is ??
Fitted piper cross, no filter in airbox, sounds great, and its livened things up....

RESULT

HAPPY HAPPY HAPPY

Geoff M
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  #18  
Old 03-Mar-2005, 21:36
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andyb andyb is offline
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Quote:
Originally posted by Shazaam!
Felix uses the RS-style tube filter. He can give you more information on them.

Another option is the BMC Italy filter.


Er, whats that blue tube...............and no grommet?

Last edited by Shazaam! : 08-Feb-2009 at 01:51.
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  #19  
Old 03-Mar-2005, 21:56
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DSC Member Shazaam! Shazaam! is offline
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It's the connection to a corsa-style crankcase ventilation system.
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