Right, a for a velocity stack to really be effective in an intake manifold it should be raised off the floor as pictured above. Without them there is said to be quite a loss.

 

Do velocity stacks still fitler the air??? i know supras run them.. also

 

Velocity stacks on a turbo dont filter the air in the least. You would have to rig up a screen mesh to cover the inlet area between the end of the inlet, and beginning of the velocity stack. Honestly, they wont make much if any difference. On intake manifolds they do, on turbo's they dont. Now modifying the compressor housing tolerances to enduce a more laminar flow has a profound effect on efficiency and power...

 

Jeff what about attaching some type of intake tube of a certain length that connects to the velocity stack? Would that cause any effect to the air flow? Would it have to be straight or could it have curves. I like the idea of having velocity stacks in an intake manifold. Kind of like the idea of ITB's.

 

I need a big Velocity stack for my applicationn Ill put a screen mesh over the opening, and the rest of the bumper will be blocked off for optimal airflow to the turbo

 

Jeff let me know if you need one . Frank makes thme for all the big dags outta carbon fiber. Matt Scrantons front end for the Celica is down there now. getting dual carbon stacks made for it . I dont think its gonna be any kind of huge noticable difference, but thye loko dope and maybe clean up the air flow going into the turbo inlet.

 

Pete how much he want for them? I would be interested.

 

dunno , ill check with him this weekend. all the ones he has made are for Y2K's, i gotta see for ours. im sure not too much .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC2R714 &raquo;</TD></TR><TR><TD CLASS="quote">Jeff what about attaching some type of intake tube of a certain length that connects to the velocity stack? Would that cause any effect to the air flow? Would it have to be straight or could it have curves. I like the idea of having velocity stacks in an intake manifold. Kind of like the idea of ITB's.</TD></TR></TABLE>

I think it would have to be straight, since curves would make the fluid travel at a different velocity through the cross-section of the curve. This may or may not cause turbulence at some part of the airflow through the curve. Of course, this would be a worst case where the curve is very close to the turbo's inlet. If you curve and then stay straight for a reasonable amount of distance (who knows what that is) it will probably be effective.

I was thinking of a long velocity stack, but with a "scoop" that caught some more air from the underside. Kind of like a cornucopia with the one side extended (or like that sport where they fling the ball around).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ricodemus &raquo;</TD></TR><TR><TD CLASS="quote">
(or like that sport where they fling the ball around).</TD></TR></TABLE>

Jai lai (sp?)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC2R714 &raquo;</TD></TR><TR><TD CLASS="quote">

Jai lai (sp?)</TD></TR></TABLE>

yeah, however you say it/spell it

 

high lie! haha, great thread. id like to know more about the distance of the intake tube off the compressor housing, i have a 4 inch inlent on my turbo, need help with an intake on it lol. just a 4 inch tube straight out with a filter on it would do i suppose? or maybe if i fabbed something where there would be stages of mesh screen, to make a total of 5 layers of mesh screen? something similar to this..

====|====|====|==== (velocity stack here) maybe a total of 10-12inches of piping?
with each | representing a mesh screen filter. and the == representing a 4 inch tube. im just tryint ot think of ways to keep the turbine safe and get as much air into the turbo as possible..safely. id like this thread to grow more, gaining interest in the velocity stacks

 

1 single screen flows less than one proper filter, so but putting 4 of those inside a tube you are bascially hitting your turbo in the nuts, its not gonna do **** but complain and have poor spool characteristics

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wantboost &raquo;</TD></TR><TR><TD CLASS="quote">1 single screen flows less than one proper filter, so but putting 4 of those inside a tube you are bascially hitting your turbo in the nuts, its not gonna do **** but complain and have poor spool characteristics</TD></TR></TABLE>

Wait I thought that the people who ran/running mesh screens are getting better spool up times then people with the proper filters? Any one care to explain?

tia

Blaze

 

yea thought it flowed more than an air filter? just looking for ideas to run an intake tube on the S housing

 

go back and read the whole thread. Screens take up a lot of the available surface area on the compressor inlet, air doesnt flow too well through solid material, combine that with the fact that the screen wire is curved, which causes the air to tumble around as is enters the turbo.

A screen on the otherhand, while it would appear that it would choke the turbo, most if the available surface area is in fact permeable not solid like a screen, that is, air can flow through it.

 

Is this with or with out a velocity stack? Also Im wondering, since the inlet on the turbo is the same size(lets say 2in), does it really matter if the screen is on there vs. having a filter(the air is going to be sucked in eathier way) I mean, can the turbo suck in more air then the inlet can keep up with? Sorry if thats confusing. Also, what do you mean by tumble? Wouldnt the flow through the charge piping cause the air to tumble/be disrupted anyways?

Sorry for the threadjack Boostedhybrid....

 

good thoughts..

 

well, if you are just running something directly off of the turbo, then id say the whole tumbling effect cant be fixed. The nice thing about having a length of pipe before the compressor inlet is that the piping gives the flow of air the time to smooth and and have a more laminar flow.

 

Looked up laminar and this is what is said: A thin plate, sheet, or layer. Is the definition that we have been using or is it something different? Sorry for my stupidness.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blaze45 &raquo;</TD></TR><TR><TD CLASS="quote">
Sorry for the threadjack Boostedhybrid....


</TD></TR></TABLE>

I'm sure he won't mind, seeing as this thread is from like 3 years ago! lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blaze45 &raquo;</TD></TR><TR><TD CLASS="quote">Looked up laminar and this is what is said: A thin plate, sheet, or layer. Is the definition that we have been using or is it something different? </TD></TR></TABLE>

Anyone?

 

I'd try to explain it, but im running on 3hrs of sleep so maybe tomorrow when my brain is functioning

 

think linear. Straight line. smooth laminar flow means that the air doesn't get caught in eddys and ****. just constant flow in one direction.

 

thank you, you defined it for me