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914World.com _ 914World Garage _ Twystd1

Posted by: Aaron Cox Feb 4 2006, 11:57 PM

look at the "protrusion" from the air filter top down the stack....
user posted image

Posted by: Elliot Cannon Feb 5 2006, 12:01 AM

Portrusion?

Posted by: Aaron Cox Feb 5 2006, 12:03 AM

typo fixed....

Posted by: Toast Feb 5 2006, 12:03 AM

Portrusion at a coffee shop between those two?

Need I ask?

Are there cops invoved?

Posted by: r_towle Feb 5 2006, 12:09 AM

It creates a vortex going into the velocity stack.

Standard stuff on harley carbs...increases swirl effect going in...it has been tested and proven on a dyno to increase HP

Actually saw it on a MC show the other day...

Rich

Posted by: Twystd1 Feb 5 2006, 12:10 AM

Toast.... The Cops came later...

The picture shows both sets of injector bosses below the throttle blades.

In another scenario...Two sets of injectors... One above the throttle blades and One below... Which to me is a more interesting configuration.

Some of these setups include two sets of throttle blades.

NOW: which one are we going to use??????????

Think about it.....

Twystd1

Posted by: Aaron Cox Feb 5 2006, 12:11 AM

yup. we were talking about ITB's , Carbs, and these "swirling devices", just kinda funny i found a pic with 2 oudda da 3

Posted by: Aaron Cox Feb 5 2006, 12:14 AM

need someone with a foundry..... to make a new airfilter top based on a CB ribbed top

oh....muelller

Posted by: Elliot Cannon Feb 5 2006, 12:15 AM

Is that anything like that "Tornado" thingy that you put in the aircleaner of your 4 barrel? One of them info-mercial things?
Elliot

Posted by: messix Feb 5 2006, 02:22 AM

looks to like its a radius guide to staighten the air flow to the throat of the t.b. it reduces the turbulence and helps the air flow make the turn into the t.b.

Posted by: MattR Feb 5 2006, 02:58 AM

aaron, do you have a picture of the internals of that bad boy?

Posted by: Twystd1 Feb 5 2006, 03:12 AM

MattR,
What are you talking about????

Twystd1

Posted by: Part Pricer Feb 5 2006, 07:10 AM

QUOTE (MattR @ Feb 5 2006, 04:58 AM)
aaron, do you have a picture of the internals of that bad boy?

Here ya go

user posted image

Posted by: Aaron Cox Feb 5 2006, 10:39 AM

i didnt notice the extra injector ports.......

wierd

Posted by: lapuwali Feb 5 2006, 10:54 AM

The things on the airfilter top may be airflow straighteners, but they may also be injector mounts that haven't been machined, yet. Jerry Woods did some experimentation years ago and produced some parts to allow a "showerhead" configuration for injectors. More time for vaporization at high revs was the plan. On race engines, it picked up a good mount of power.

Posted by: Dr. Roger Feb 6 2006, 11:21 AM

I don't think it's necessarily the vortex effect. More the "allowing air to curve down into the intake as opossed to air coming fron the sides and making a hard downward turn effect". Keeping air velocity more uniform and pressures more evenly distributed. Less turbulence.

chevrolet has been doing this for... forever. =-)

user posted image

Chevy fuond that by placing the raised area in the aircleaner cover around the perimeter and then the lower area at the center it got the air to go down the carb more efficently. More power. boy that came out terribly... LOL