<VV> Air Filter Tests (no direct Corvair)
Bill Elliott
Bill Elliott" <Corvair@fnader.com
Fri, 14 Jan 2005 15:14:01 -0500
Well, I will answer that one. All production automotive designs are a series of compromises.
Filtering versus flow
Noise versus flow
Cost versus performance.
You CAN get a marginal power increase in many engines by removing intake restrictions. You can get a signifcant increase if you make other modifications
to take full advantage of the lower restriction.
As an example, in a British A-series engine, it's typical to see a 15% (significant) power increase by adding a Stage 1 kit (header, turbo-type muffler,
performance intake, K&N filter...even in the original housing, and a richer carb needle). A Corvair engine responds well to a more open exhaust and intake
(and a slightly larger jet), but not to the same degree.
I agree that in an otherwise unmodified engine simply adding a K&N is going to add a lot more dirt and noise than it will power... but luckily we don't have to
settle for "otherwise unmodified" engines. And I happen to love intake noise...
Bill
On Fri, 14 Jan 2005 11:57:27 -0800, corvairs wrote:
>Well, the arguments used by some aftermarket air filter companies have
>never made any sense. Increased air flow is only an issue if, for some
>unexplainable reason, the factory intentionally over-restricted the
>airflow with thier filter design. Don't think so. Increasing air flow
>(besides increasing contaminate flow) does nothing but lean up the
>mixture unless you have a corresponding change in the fuel
>supply........Bottom line - as I've said many times - if you could get a
>noticible increase in hp just by using filter brand X then why didn't
>the factory use them? A 10% increase in advertised hp by just using
>brand x air filter? WOW! Lon
>www.corvairunderground.com
>Dave Keillor wrote:
>>No surprise here. More air flow, more dirt flow.
>>
>>Dave
>>
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