[DeTomaso] Air cleaner suggestions

[Robert Stroj]

Hi, I thought it might be useful information related to air cleaners.

After installing new motor in my car was tuning everything on a chassis dyno; whatever we ware doing (changing jets, timing) there was a horrible looking deep f on power and torque between 4k and 5k rpm....cleaner installed was dropped base large diameter 2inch high element on Holley racing carburetor and 1 inch spacer below carburetor.
Finally, not sure why, we removed cleaner top and  deep was totally gone, curve looked perfect!
Since I changed to smaller diameter but much taller kn filter, removed carburetor spacer to be able to maximize distances between carburetor and filter top plus use kn breathable filter top and power/torque curve is perfect, same as it was without the top.

Seems that resonance introduced by not enough space between carburetor and cleaner top can have a huge effect on engine performance; in my case deep was over 50hp and also A/F ratio in that range was all over the place; with tall cleaner all got perfect!


> On Aug 1, 2019, at 5:01 PM, Charles Engles <cengles at cox.net> wrote:
> 
> Dear Fellow V8 Propulsion Scientist,
> 
>               IIRC, the Dog Bone was pronounced by some Houston dyno testing about ten years ago as permitting more HP than any of the other common air filters.   I was surprised.  Over the years, IIRC, further testing did not confirm the earlier results.   Is that the gist of it?
> 
>                              Warmest regards,  Chuck Engles
> 
> 
> 
> 
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On Behalf Of Himes, Terry (US 397C) via DeTomaso
> Sent: Thursday, August 01, 2019 9:26 AM
> To: Panteratime; detomaso at server.detomasolist.com
> Subject: Re: [DeTomaso] [EXTERNAL] Air cleaner suggestions
> 
> I've always loved the look of the dog-bone. Some have tried to say it is restrictive, but testing has proven it is not!  
> 
> T.
> 
> "A Purple Heart proves you were smart enough to hatch a plan,  stupid enough to try it and lucky enough to survive!"
> 
> Terry W. Himes
> JPL Jet Propulsion Laboratory
> Deep Space Exploration – Mission Operations
> 
> Dawn Spacecraft Team
> Juno Systems & Software Team
> TGO Sequence Lead
> Odyssey Sequence Team
> Spitzer Space Telescope Data Team
> 
> Phone: (818) 393-6261
> Cell:     (818) 653-8213
> thimes at jpl.nasa.gov
> 🇺🇸
> 
> 
> On 8/1/19, 6:00 AM, "DeTomaso on behalf of Panteratime via DeTomaso" <detomaso-bounces at server.detomasolist.com on behalf of detomaso at server.detomasolist.com> wrote:
> 
>    Folks,I currently have a Mr Gasket polished aluminum air cleaner that resembles a blower scoop!    It has a 6.5 inch round filter element.   I am assuming this filter that I have had on the car for years is restrictive and am looking for suggestions on alternatives.   Would like something polished aluminum, very unique, and nonrestrictive.   I do not have the engine screen on car so height is not a factor.   This air filter will go on the Road Demon carb.   I have an Edelbrock polished intake manifold.
>    Any suggestions are greatly appreciated!   I love the look of this "blower" scoop sneaking out of the engine bay but maybe time for a change.  Thanks !   
> 
> 
>