04-01-2013, 01:14 PM
IMO:
Standard paper filters are fine for stage 1 or a "mild" stage 2 with a restrictive exhaust etc. For stage 2, they're wank. You can feel the resistance up in the revs, it just isn't as "happy" up above 3.5k. It'll still pull, but you're quicker changing up a cog.
Panel inserts are an improvement, and feel almost as good as a cone, much happier at the top end. BUT. K&N's need oil, oil (allegedly) kills MAF sensors. Therefore I'd question the point of fitting one over a cone.
I've recently got a clean (ish) cone from the breakers, no oil but I'm happy it's filtering well enough. Gains over the standard box are probably in my head, but it sounds nicer and is better than either of the options above, so I'm gonna stick with it for now.
If the MAF can be properly mapped out, then I reckon that's the way to go. If not, I'm gonna look into dry foam panel inserts, maybe do some flow tests if I feel it's worth the time.
Also, when I do a dyno run, I'm taking all my filters with me and intend to test the options to see if there's a power change, or more likely a power DELIVERY change, like I've said, it feels like the cone and K&N both let the engine rev more freely.
Standard paper filters are fine for stage 1 or a "mild" stage 2 with a restrictive exhaust etc. For stage 2, they're wank. You can feel the resistance up in the revs, it just isn't as "happy" up above 3.5k. It'll still pull, but you're quicker changing up a cog.
Panel inserts are an improvement, and feel almost as good as a cone, much happier at the top end. BUT. K&N's need oil, oil (allegedly) kills MAF sensors. Therefore I'd question the point of fitting one over a cone.
I've recently got a clean (ish) cone from the breakers, no oil but I'm happy it's filtering well enough. Gains over the standard box are probably in my head, but it sounds nicer and is better than either of the options above, so I'm gonna stick with it for now.
If the MAF can be properly mapped out, then I reckon that's the way to go. If not, I'm gonna look into dry foam panel inserts, maybe do some flow tests if I feel it's worth the time.
Also, when I do a dyno run, I'm taking all my filters with me and intend to test the options to see if there's a power change, or more likely a power DELIVERY change, like I've said, it feels like the cone and K&N both let the engine rev more freely.
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