[DeTomaso] Fw: COOK ENT EFI INDIVIDUAL BILLET AIR FILTERS

[Will Demelo]

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

Do you mean the small flat "cap" type filters that snap over the top of the stack?


----- Original Message ----- 
From: Mike Trusty 
To: 'Mad Dog Antenucci' ; 'michael frazier' ; 'Will Demelo' ; detomaso at realbig.com 
Sent: Wednesday, December 05, 2007 10:25 AM
Subject: RE: [DeTomaso] COOK ENT EFI INDIVIDUAL BILLET AIR FILTERS


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