:::RHMT::: Real Home Made Turbo

General Category => Fabrication => Topic started by: HiProfile on May 02, 2009, 02:35:55 PM

Title: rHMT Filter Velocity Stack
Post by: HiProfile on May 02, 2009, 02:35:55 PM

I'm thinking about making my own velocity stack/base for a K&N cone filter. Bottom line is I want a 4" inlet filter for a possible 4" inlet turbo, but have 3" atm. I just can't find shit for bushings, nor do I have space for normal reducers. The 4" K&N's also have a size selections for my current space restrictions, as my topmount puts it right where a Civic's PS reservoir normally sits.

I'm thinking about using a section of 3" and 4" aluminum tubing, with 1/2" alum TUBE as the rounded part...Devcon'd together (JB weld for alum), ends flared & smoothed out. Anyone every try an idea like this?? (red by tubes is the devcon)

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fimg147.imageshack.us%2Fimg147%2F8877%2Fvelstack2.gif&hash=b5bd6db11454ff6ef61ea38b6a2159649bdd0e9f)

This is the filter I plan on using if anyone cares (http://www.knfilters.com/search/product.aspx?Prod=RU-2520)

Title: Re: rHMT Filter Velocity Stack
Post by: 92CXyD on May 02, 2009, 02:53:45 PM

I was wondering about making velocity stacks for a ITB setup myself and I was wondering about Devcon or some other Aluminum epoxy.

Or is there a cheap source for velocity stacks?

I remember reading something about an idea velocity stack design.

Something about taking the dia. of throat D.

Then flair the edges out along radius D.

And end up with a total dia. being 3*D.

I read that in Maximum Boost by Corky Bell (best turbo book ever :yes:)

Title: Re: rHMT Filter Velocity Stack
Post by: HiProfile on May 02, 2009, 05:53:05 PM

I found this link a while back, has some cheap v-stacks, appears to be nice quality too:
http://www.velocity-of-sound.com/velocity_of_sound/velocity_stacks.htm (http://www.velocity-of-sound.com/velocity_of_sound/velocity_stacks.htm)


I'm looking to make it more of a bushing, so I don't have to buy a seperate 3" and 4" filter. I do have a Holset HE351VE with a big 4", just not sure when I'll use it.

Title: Re: rHMT Filter Velocity Stack
Post by: 92CXyD on May 02, 2009, 05:57:36 PM

Are your registered on turbobyholset.com we can use some more tech. there.

BTW I like your write-ups. I'm doing the 3-bar Honda map sensor this weekend. :yes:

Title: Re: rHMT Filter Velocity Stack
Post by: Conceptz-X on May 02, 2009, 07:52:15 PM

I think some of your better filters have a radiused entry.

Title: Re: rHMT Filter Velocity Stack
Post by: t_cel_t on May 04, 2009, 04:00:15 AM

i know i have seen k&n that already have the bell inside them, or those round hks fiters that have like wire over the filter