[Tigers] Air cleaner & horsepower

[awtiger]

Yes, Tom...remember the velocity stacks that the Can-Am cars and dragsters 
used to run in their day?  Those had a ramming effect; not only did it pull 
air straight in, but it also "straightened out" the turbulence, thereby 
making the engine breathe more efficiently.

Andy Walker
Edmond, OK
B382001600LRXFE
TAC #740

----- Original Message ----- 
From: "Thomas Witt" <atwittsend at verizon.net>
To: <tigers at autox.team.net>
Sent: Thursday, July 05, 2012 5:30 PM
Subject: Re: [Tigers] Air cleaner & horsepower


> While air is fluid, it is also turbulent. And, as you stated it can move 
> backwards in relationship to a forward moving car.  For air to turn a 
> sharp corner over the choke housing potentially reduces its ability to 
> flow smoothly through the venturi's.  Also most of this discussion related 
> to the air cleaner height measured from the mounting base for the filter 
> housing. As Theo was getting at the choke housing rises at least an inch 
> or so on most carburetors. With a 2" filter and a lid on top this 
> effectively makes for about an inch of air passage over a relatively sharp 
> edged choke housing.
>
> From my understanding a venturi stack with a length long enough to 
> straighten the air before entering the carburetor would be ideal. Even the 
> filter base can matter.  I recall test done in the '70's where running the 
> car without a filter still had a few HP gain simply by retaining the base 
> and removing a degree of turbulence.
> Tom
>
>
>> Theo,
>>
>> I'm not an engineer, just a guy that has been playing with cars, race
>> cars, motorcycles, boats and airplanes for 35 years.
>>
>> An internal combustion engine is nothing more than an air pump, it
>> sucks air, as much as it can, therefore, I do not get the "can't turn
>> a corner" comment.
>>
>> Air is about the most fluid thing there is, it even goes backwards on
>> a 200 mph race car going forwards because of poor aero design.
>>
>> Have you seen the air flow models for an F1 car, air can be made to do
>> about anything you want it to do.
>>
>> Air filters are judged by 1) surface area and 2) restriction quality.
>>
>> My suggestion more than triples the effective surface area of any 2"
>> round air filter and by using a K&N type oil cloth element, the
>> restriction is also much less.
>>
>> So please educate me, I open to learn.
>>
>> Michael
>>
>>
>>
>> On Thu, Jul 5, 2012 at 12:01 PM, Smit, Theo <Theo.Smit at dynastream.com> 
>> wrote:
>>> That looks trick but how tall is the center part? If it's only two 
>>> inches or
>> so, then you don't really gain any flow capability over the stock 
>> assembly.
>> The main problem with a four-barrel and medium to high rise manifold is 
>> that
>> you can't get the air to turn the corner and get into the carb, 
>> especially if
>> the carb has a choke tower.
>>>
>>> Theo
>>>
>>>> -----Original Message-----
>>>> From: tigers-bounces at autox.team.net [mailto:tigers-
>>>> bounces at autox.team.net] On Behalf Of michael at michaelshortt.com
>>>> Sent: July 5, 2012 9:29 AM
>>>> To: Dave Munroe
>>>> Cc: tigers at autox.team.net
>>>> Subject: Re: [Tigers] Air cleaner & horsepower
>>>>
>>>> If some of you are serious about gaining HP over the stock look ( and
>>>> you can always keep a stock housing in the trunk for car shows ),
>>>> I strongly recommend using a pair of K& N conical air filters with a
>>>> relocation kit like this one.
>>>>
>>>> http://www.summitracing.com/parts/SPE-771/?rtype=10
>>>>
>>>>
>>>> Michael Shortt
>>>>
>>>
>>>
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>>>
>>
>>
>>
>> --
>>
>>
>>
>>
>>
>>
>>
>> Michael L. Shortt
>> Savannah, Georgia
>> www.michaelshortt.com
>> michael at michaelshortt.com
>> 912-232-9390
>>
>>
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