[DeTomaso] COOK ENT EFI INDIVIDUAL BILLET AIR FILTERS

[Mad Dog Antenucci]

Excellent post Mike. 
  Thanks
   
  Dawg
  
Mike Trusty <miketrusty at msn.com> wrote:
  OK, since Dennis has injected me into this situation I'm going to make some
comments:



1. Everything to do with cars is a combination of compromises. You
are always giving and taking to try and come up with an acceptable
compromise.

2. There is only one air cleaner on the market today that in my
opinion allows for the least compromises in performance. It is a plenum
type and is totally lacking of any bling. And on top of that is would be a
great rain catcher in a Pantera since the air filter is horizontal and open
on top. It could be capped with a plenum and used for cold air induction
and that has been discussed with Dennis. Did I mention that it is ugly?
The old adage about if it looks good it will go fast is not always true. It
would be very hard to remove the air cleaner for show purposes because the
lower plate is located between the throttle body and the velocity stack.

3. When talking about stack heights like Dan has referenced you need
to consider the total length of the intake runner from the valve to the
velocity stack. Dan is correct in his description of the effects of length
on engine performance. Dan is talking about total length, Dennis is talking
about length of the throttle body plus the length of the velocity stack and
nothing about the intake runner length. Dan wants top end performance in a
system that will fit below the stock engine screen. Dennis wants something
that runs well on the street, performs well at ORR events, and has
tremendous bling. Two different compromising paths.

4. The stacks that Dennis is talking about are the velocity stacks
not the throttle bodies. The velocity stacks that are on Dennis's system
are 2" tall in an effort to keep the total length of the system as short as
possible and provide the requested "bling". Velocity stacks are available in
lengths up to 6" tall in increments of 1". There are both performance
differences in these units as well as appearance differences. Pay your
money and make your choice.

5. The most difficult part of building systems for me is finding an
air filtration system that performs properly and looks good as well. The
plenum unit mentioned above provides good performance but doesn't look good.
The units like Kelly has and the Cook units look great but have performance
problems. I'm stuck in the middle trying to come up with a compromise.
Have I mentioned that I hate compromises? Anyway. Ken Green mentioned
something that is very important and virtually always overlooked except in
the plenum style unit. That is the air flow entering the velocity stacks.
TWM, Hilborn, Kinsler, etc. have determined that a large radius of the top
edge of the velocity stack is very important. Much of the air that enters a
properly designed velocity stack actually comes up from below the velocity
stack top edge following the radius of the edge. ALL of the "top" mounted
air filters that look good destroy this effect. They have a bottom plate
with holes in them for the air to enter covered with small restrictive air
filters. But, they look good.

6. The large radius velocity stacks like on Dennis's system will not
fit inside any of the weber style filter assembles.

7. The donut filters are the worse compromise of them all.



Now you might understand my struggle with compromise. If I'm quoted on
something, please understand that it is probably out of context.





Mike Trusty Engineering

15119 Gorgeous View Trail

Little Rock, AR 72210

Ph: 501-224-9013

Fax: 501-421-0151



-----Original Message-----
From: Mad Dog Antenucci [mailto:teampantera at yahoo.com] 
Sent: Tuesday, December 04, 2007 10:08 PM
To: michael frazier; Will Demelo; detomaso at realbig.com
Subject: Re: [DeTomaso] COOK ENT EFI INDIVIDUAL BILLET AIR FILTERS



According to MikeTrusty its the "cool factor"..... the tall stacks look cool
the simulation impact doesn't equate to real world dyno results...in other
words "no measurable increase......besides what would you do with more then
118HP? ;-]>





Mike Trusty Engineering

15119 Gorgeous View Trail

Little Rock, AR 72210

Ph: 501-224-9013

Fax: 501-421-0151



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Mad Dawg Antenucci 
Team Pantera Racing 
  The 1st & still the only vintage race team in open road racing 
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