[DeTomaso] Air Cleaner

Daniel C Jones daniel.c.jones2 at gmail.com
Wed Sep 4 13:34:44 EDT 2013 

Several of Vizard's books have data on power tests with K&N filters.
K&N's website has info on SAE filtering tests run by an independent
lab.  Bobs-the-oil-guy's website has (or had) a link with filtration
tests of a variety of air filter types (paper, foam, cotton-guaze, etc.).
The results suggest that paper filters best, followed by the K&N, with
foam filters the worst.  None of the filters were perfect and I was
somewhat surprised to see the K&N filters were as close to the paper
filters as they were.  Note that any filter (paper or oiled cotton gauze)
has worse filtering until dirt loaded.

A guy I know dyno tested 14" diameter (2 and 3 inch tall) air filters on his
SBF drag race engine.  When clean, the best of the pleated paper air filters
(Motorcraft FA-41. Wix) made the same power as a K&N.  Most of the paper
filters (AC 212, Fram, Purolator) were down about 5 HP.  No air filter at
all was worth 18 HP on his engine.

In practice, I believe K&N's filter well enough, assuming you do regular oil
changes.  I've owned a 1987 Mustang GT since new and it's run the same
K&N filter (pleated panel type filter in stock location with intake silencer
removed) for most of its life.  Many years ago, at 163,000 miles, I pulled
the 5.0L HO V8 out of the Mustang.  It still ran fine, held good oil pressure
and got good gas mileage but I figured it was time for a look-see inside.
After 163,000 miles, the engine had no discernable wear.  Block, pistons,
crank, cam, and lifters are all within the factory manual tolerance for
*new* parts.  No ridge whatsoever on the cylinder walls.  The factory
cross hatch hone was still present on the bores.  Cam bearings were on the
tight side.  For the first 40K miles I ran conventional oil with 3000 mile
changes, after that I switched to synthetic oil at 5000 mile changes.
The engine has over 225K miles on it now with the stock pistons, rods,
cranks, block, cam etc. and still holds excellent oil pressure.

I believe a paper air filter of sufficient surface area would filter better
than a K&N but my single data point (as well as those of friends who have
been running them since the 1970's) indicates the K&N filters acceptably
well, providing you perform regular oil changes.

YMMV,
Dan Jones

On Wed, Sep 4, 2013 at 11:10 AM, michael at michaelshortt.com
<michaelsavga at gmail.com> wrote:
> ROFLMAO...BMW Forums.
>
> How many BMW owners do you know who actually work on or service their own
> cars?
>
> Michael Shortt
> Reformed BMW Owner.
>
>
> On Wed, Sep 4, 2013 at 11:58 AM, Pantdino <pantdino at aol.com> wrote:
>
>>  On the BMW forums the feeling is that K+N filters do not filter as well
>> as paper and that the engines seem to wear out sooner.
>>
>> Somewhere I read an article saying the surface area of the filter is more
>> important than the material, but I'm sure that is only true within limits.
>>
>> Jim Oddie
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Mike Drew <MikeLDrew at aol.com>
>> To: Julian Kift <julian_kift at hotmail.com>
>> Cc: De Tomaso List <detomaso at poca.com>; Melanie Disco <
>> michael at michaelshortt.com>; J B Reardon <jbreardon at yahoo.com>
>> Sent: Wed, Sep 4, 2013 3:42 am
>> Subject: Re: [DeTomaso] Air Cleaner
>>
>> Foam filters also burn merrily when the engine backfires and ignites the fuel
>> vapors therin. British guys like them for reasons of tradition, but most
>> Americans are rather more averse to engine fires.
>>
>> K&N advertising claims their filters flow drastically more air than foam
>> filters, and I believe it. Whether they filter dirt as well, I don't know...
>>
>> Mike
>>
>> Sent from my iPhone
>>
>> On Sep 3, 2013, at 13:43, Julian Kift <julian_kift at hotmail.com> wrote:
>>
>> > What, the fact they are British isn't enough for you ;>)
>> >
>> >
>> >
>> > Both are readily available in the U.S.A. http://itgfilters.net/ and http://www.pipercrossusa.com/
>> >
>> >
>> >
>> > I was always led to believe that foam filters have a better airflow (lower
>> delta P) at higher cleaning efficiency/higher particulate load up. Look at most
>> vintage racecars running ITB's or carbs and the largest proportion will have one
>> of these style foam filters. I run a Pipercross filter on the Formula Atlantic
>> using twin DCOE Webers. When compared to the K&N sandwiched between two plates
>> the open filter area is significantly larger and you don't have a blank sat
>> right over your carb/throttle body inlet.
>> >
>> >
>> >
>> > Probably not the scientific justification you were looking for I know.
>> >
>> >
>> >
>> > Julian
>> >
>> >
>> >
>> >
>> > Date: Tue, 3 Sep 2013 15:22:16 -0500
>> > Subject: Re: [DeTomaso] Air Cleaner
>> > From: kirby.schrader at gmail.com
>> > To: julian_kift at hotmail.com
>> > CC: michael at michaelshortt.com; detomaso at poca.com; jbreardon at yahoo.com
>> >
>> >
>> > And here I was sitting and wondering why I'd never heard of either company.
>> > Both British!
>> > I should have known, Julian!
>> > :-)
>> >
>> >
>> > Do you have personal experience with how/why they are better than K&N, for
>> example?
>> >
>> >
>> > Just wondering...
>> >
>> >
>> > Kirby
>> >
>> >
>> >
>> >
>> >
>> > On Tue, Sep 3, 2013 at 2:44 PM, Julian Kift <julian_kift at hotmail.com> wrote:
>> >
>> >
>> >
>> > I like the IPSCO offering, but when I do mine I'm going to go with an ITG or
>> Pipercross foam filter system.
>> >
>> > Julian
>> >
>> >
>> >> Date: Tue, 3 Sep 2013 09:18:34 -0500
>> >> From: kirby.schrader at gmail.com
>> >> To: michael at michaelshortt.com
>> >> CC: detomaso at poca.com; jbreardon at yahoo.com
>> >> Subject: Re: [DeTomaso] Air Cleaner
>> >>
>> >> Or, you could go with IPSCO's offerings...
>> >> Depends on what you are looking for.
>> >>
>> >> I have this setup on my Pantera and my GT40.
>> >>
>> >> http://www.ipsco.org/General%20Products/Air%20Cleaner%20Set.htm
>> >>
>> >> FWIW,
>> >> Kirby
>> >>
>> >>
>> >>
>> >> On Tue, Sep 3, 2013 at 9:15 AM, michael at michaelshortt.com <
>> >> michaelsavga at gmail.com> wrote:
>> >>
>> >>> I would go to www.summitracing.com and look around.
>> >>>
>> >>> Michael Shortt
>> >>>
>> >>>
>> >>> On Tue, Sep 3, 2013 at 9:58 AM, J B Reardon <jbreardon at yahoo.com> wrote:
>> >>>
>> >>>> I have a set of TWM throttle body induction system. I am looking for some
>> >>>> nice air filters. I was thinking of a K&N with aluminum top and base.
>> >>> Does
>> >>>> anyone have a source?
>> >>>>
>> >>>> Jim
>> >>>> _______________________________________________
>> >>>>
>> >>>> Detomaso Forum Managed by POCA
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>> >>>
>> >>>
>> >>> --
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>> Michael L. Shortt
>> >>> Savannah, Georgia
>> >>> www.michaelshortt.com
>> >>> michael at michaelshortt.com
>> >>> 912-232-9390
>> >>>
>> >>>
>> >>> This email is protected by the Electronic Communications Privacy
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>
>
> --
>
>
>
>
>
>
>
> Michael L. Shortt
> Savannah, Georgia
> www.michaelshortt.com
> michael at michaelshortt.com
> 912-232-9390
>
>
> This email is protected by the Electronic Communications Privacy
> Act, 18 U.S.C. Sec. 2510-2521, is confidential and may be legally
> privileged.  If you are not the intended recipient, you are hereby notified
> that any retention, dissemination, distribution or copying of this
> communication is strictly prohibited.  Please reply to the sender that you
> have received this message in error, then delete it.  Thank you
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