<VV> Air Filter Tests (no direct Corvair)

[Mark Noakes]

Well, I run a K&N air filter kit (which also replaced the tube from the throttle body to the air cleaner which is mounted up front) and Hedman Hedder on my wife's 97 Jeep Wrangler...no other mods...yes, the EFI takes care of the mixture issue.  The combo made a radical difference in acceleration from annoyingly wimpy to fairly tolerable.  I'd never seen the actual dirt numbers before...figured that there would be some difference...this is maybe more than I was hoping for though.

Jeeps don't last long anyway so I doubt the little extra dirt will make much difference, but I also run one in my vette...probably won't change there either.  Everything has a price.

Mark Noakes

----- Original Message -----
From: "Dave Keillor" <dkeillor@ultrex.com>
To: "'corvairs'" <lonwall@corvairunderground.com>
Subject: RE: <VV> Air Filter Tests (no direct Corvair)
Date: Fri, 14 Jan 2005 14:41:39 -0600

> 
> That's true on a carburetor engine, but not necessarily on a
> computer-managed fuel injection engine.  On those engines, the air flow
> sensor will increase the fuel to keep the mixture correct.  Still, the
> improvements of a high-flow filter are marginal and (IMO) don't offset the
> decreased filtering.
> 
> Dave
> 
> -----Original Message-----
> From: corvairs [mailto:lonwall@corvairunderground.com]
> Sent: Friday, January 14, 2005 1:57 PM
> To: Dave Keillor
> Cc: virtualvairs@corvair.org
> Subject: Re: <VV> Air Filter Tests (no direct Corvair)
> 
> 
> 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
> >
> > -----Original Message-----
> > From: Bill Elliott [mailto:Corvair@fnader.com]
> > Sent: Friday, January 14, 2005 12:48 PM
> > To: virtualvairs@corvair.org
> > Subject: <VV> Air Filter Tests (no direct Corvair)
> >
> >
> > http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm
> >
> > I thought this might prove to be interesting data to consider. (I regularly
> > use both Amsoil and K&N filters in most of my cars....)
> >
> > Bill Elliott
> > Urbana, MD
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Mark Noakes
http://blog.mark.noakes.com/

"In theory there is no difference between theory and practice, but in practice there is usually a difference."