[Tigers] Air cleaner & horsepower

[Larry Paulick]

I run a 2" K&N with stock air cleaner, and a stock 5.0 L with F4B and 
Holley Double Pumper, and roller rockers.  Dyno'ed at 297 hp and 347 
torque at 4700 rpm. I wanted a torque motor.   I also fabricated a cold 
air box and reverse hood scoop for positive air pressure, which of 
course could not be tested on the dyno.

Larry

On 7/3/12 5:50 PM, genepadgett at comcast.net wrote:
> I don't have the article you are recalling, but I did a lot of research into this topic myself a couple of years ago.
>
> The K&N website has some good info on how their elements flow air better than various other materials. In terms of shear surface area the stock filter is woefully undersized. As I remember, even going to the K&N 2 inch filter was not enough for a motor with any sort of upper RPM power. I did all the computations about a motor being an air pump, volume of air moved at various rpm, volumetric efficiency, etc. Bottom line even the 2 inch K&N filter started choking off the amount of air flow needed at about 4000 rpm with a 260 motor So any operation above that threshold you would not be getting enough air into the motor for optimal performance. Bigger motor, bigger problem. Does it equate to 30 HP? I have no idea, only a dyno could tell. And the dyno run should be with the hood closed, if that can be done.
>
> Just my 2 cents.
>
> Gene
>
> ----- Original Message -----
> From: "Allan Ballard"<aballard at ix.netcom.com>
> To: "Tiger's Den"<tigers at autox.team.net>
> Sent: Tuesday, July 3, 2012 3:58:53 PM
> Subject: [Tigers] Air cleaner&  horsepower
>
> Somewhere I read that the factory air cleaner costs 30 horsepower compared to
> a free flow filter.
>
> The coveted factory air cleaner housings look great nonetheless :)
>
> A friend challenged the 30 figure and now the article that I read has gone
> missing.
>
> Does anyone have information on the factory air cleaner's impact on horsepower
> ??
>
> Rgds
>
> Allan Ballard
> Mk1a
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