SuzukiSavage.com - Foam air filter and air flow stabilizer

mpescatori

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Foam air filter and air flow stabilizer
02/08/13 at 06:13:04

Some time ago I read a wonderful thread (many pages long, actually) in which the author described his experimenting with various air filters, intake manifolds and tube size, shape and length;
he experimented with air filter shapes and sizes, and came to fabricate by himself a "honeycomb" structure with party straws to stabilize air flow.

It might have been Diamond Jim, but the one thread I found with his data on it does not have the air flow graphs and diagrams I was looking for.

I desperately need it because my bike is almost finished, with the Stage 3 Webcam, a new cam chain with the Verslavvy on it, a full set of jets to play with, a chain drive conversion and... I lost the one thread which explained how to shape the intake manifold?
Embarrassed

Could anyone PLEASE lend a helping hand ?

I have a full HAMC gang waiting at the lights... ready to smoke some rubber... Shocked

(No, really, I do need that thread...)

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Maurizio Pescatori, Esq.
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Mikuni BST40, K&N filter, Stage2 cam, Verslagen tensioner, Sportster muff, 120 proof moonshine, Pirelli MT 66 tourers... and a chain conversion too !

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EJID Serious Thumper Offline Work to ride and ride to work. Posts: 1536 Pocatello, ID Gender:	Re: Foam air filter and air flow stabilizer Reply #1 - 02/08/13 at 07:57:10 I think this might be the one you are searching for... "turbulator" http://suzukisavage.com/cgi-bin/YaBB.pl?num=1237731838/0
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mpescatori Serious Thumper Offline Romanum Thumperium Cavalco, yeaaah !!! Posts: 3547 Rome, Italy Gender:	Re: Foam air filter and air flow stabilizer Reply #2 - 02/10/13 at 14:15:25 EJID wrote on 02/08/13 at 07:57:10: I think this might be the one you are searching for... "turbulator" http://suzukisavage.com/cgi-bin/YaBB.pl?num=1237731838/0 Yessssssss ! Thank you !
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bill67 Serious Thumper Offline old tired Posts: 8517 genoa city wisconsin Gender:	Re: Foam air filter and air flow stabilizer Reply #3 - 02/10/13 at 14:19:48 Did you ever wonder why a car or motorcycle company didn't put one of those turbulators in their cars.Those guys are just not thinking.
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SALB Serious Thumper Offline FSO Posts: 668 Whittier, AK Gender:	Re: Foam air filter and air flow stabilizer Reply #4 - 02/10/13 at 15:58:25 bill67 wrote on 02/10/13 at 14:19:48: Did you ever wonder why a car or motorcycle company didn't put one of those turbulators in their cars.Those guys are just not thinking. Because Marty has a copyright on the Flux Capacitor!?
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jcstokes

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Re: Foam air filter and air flow stabilizer
Reply #5 - 02/11/13 at 01:23:42

1928 four cylinder Chevrolets had these in the intake ports. Other early Chevs may have used them as well. Apparently American farmers used to put a piece of guaze on the top of their updraft carbs to break up the atomised mixture a little more. The claim was greater torque rather than overall power, never substantiated in a test lab. Ford in England advocated another "mixing" "stirring" device on some 1930's-50's downdraft carbs. Torque being the alleged major gain.

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Dave

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Re: Foam air filter and air flow stabilizer
Reply #6 - 02/11/13 at 07:04:10

bill67 wrote on 02/10/13 at 14:19:48:

Did you ever wonder why a car or motorcycle company didn't put one of those turbulators in their cars.Those guys are just not thinking.

I agree with Bill. If there was some benefit to be had from flow stabilizers.....you would see them on production or racing cars. Corporations are spending huge dollars trying to get better mileage and performance - and yet with all the fancy improvements we don't see any kind of flow stabilizer mixed in with all the tuned intake ports, variable cam timing, direct injection, etc. If it made more horesepower, better fuel economy, less pollution......somebody would be using it.

One of the things I wonder about is the reduced flow that might come from an increase in surface area/friction. All those tubes increase the surface area that the flowing air must pass by - and the flow at the surface will be less than the flow in the interior of the air stream. The increased friction loss is almost certainly going to reduce the air flow more than the laminar flow will increase it.

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« Last Edit: 02/11/13 at 09:12:20 by Dave »

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gone fishing

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Re: Foam air filter and air flow stabilizer
Reply #7 - 02/11/13 at 07:44:32

Dave wrote on 02/11/13 at 07:04:10:

bill67 wrote on 02/10/13 at 14:19:48:

Did you ever wonder why a car or motorcycle company didn't put one of those turbulators in their cars.Those guys are just not thinking.

I agree with Bill. If there was some benefit to be had from flow stabilizers.....you would see them on production or racing cars. Corporations are spending huge dollars trying to get better mileage and performance - and yet with all the fancy improvements we don't see any kind of flow stabilizer mixed in theiwith all the tuned intake ports, variable cam timing, direct injection, etc. If it made more horesepower, better fuel economy, less pollution......somebody would be using it.

One of the things I wonder about is the reduced flow that might come from in increase in surface area/friction. All those tubes increase the surface area that the flowing air must pass bay - and the flow at the surface will be less than the flow in the interior of the air stream. The increased friction loss is almost certainly going to reduce the air flow more than the laminar flow will increase it.

+1

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mpescatori

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Re: Foam air filter and air flow stabilizer
Reply #8 - 02/12/13 at 08:17:43

Point taken.

It is also true, however, that the most recent engines, both MC and in cars, have variable (length/diameter) intake manifolds to adapt to rpms and throttle aperture.

On a Savage this is not possible.

Similarly, by your terms the UFO would not be much use, yet many tuners swear by it (one right here on this Forum)

So, there's got to be a little truth in all this razzmatazz...

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Maurizio Pescatori, Esq.
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Mikuni BST40, K&N filter, Stage2 cam, Verslagen tensioner, Sportster muff, 120 proof moonshine, Pirelli MT 66 tourers... and a chain conversion too !

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Dave

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Re: Foam air filter and air flow stabilizer
Reply #9 - 02/12/13 at 09:05:18

mpescatori wrote on 02/12/13 at 08:17:43:

Point taken.

Similarly, by your terms the UFO would not be much use, yet many tuners swear by it (one right here on this Forum)

So, there's got to be a little truth in all this razzmatazz...

There is a big difference in the flow stabilizer for the Round Slide Mikuni. That devide goes on the slide, and eliminates the depresson of the bottom of the slide that causes turbulence. The device attempts to make the venturi smoother and cause less turbulence directly over the jet opening - it is not attempting to smooth out air flowing into the carb throat. The flat slide Mikuni's are supposed to be the better design for air flow at partial throttle settings.

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