If i posted this in the wrong forum, please feel free to move it mods.

I am thinking about trying a set of ITBs on my H series All motor car. It is a dedicated track car.

I would guess that building a plenum of some sort with a scoop is probably the best way to get air to the ITBs on the track. I was thinking about just cutting the hood and using an STI hood scoop.

Just Looking for some insight/ ideas on what others may have used to get more air to their B/H ITB setup. If the answer is "build a plenum," then any tips someone can tell me on that too would be great.

Thanks in advance . .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2fastGSR &raquo;</TD></TR><TR><TD CLASS="quote">
If i posted this in the wrong forum, please feel free to move it mods.

I am thinking about trying a set of ITBs on my H series All motor car. It is a dedicated track car.

I would guess that building a plenum of some sort with a scoop is probably the best way to get air to the ITBs on the track. I was thinking about just cutting the hood and using an STI hood scoop.

Just Looking for some insight/ ideas on what others may have used to get more air to their B/H ITB setup. If the answer is "build a plenum," then any tips someone can tell me on that too would be great.

Thanks in advance . .

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

cut a Giant hole in the hood... or take the hood off.....


or use one of these...

 

honestly though some kind of box directing air to the ITBS would prob work well.

try looking up carburetor setups and the intakes used for them.

have you seen the plenum for the Skunk2 Integra..

something like that but directed out of the top of the hood?

 

imo, i have seen crazy things with itb's. the proper way of getting air into itbs is to have the least amount of turbulence and a proper sized box per literage to feed the motor. the way i see it, people using itbs without a plenum box isnt doing it the right way.

something like ie: 2.2l @ 390cfm = 8 liter box.

im just throwing numbers out there so you can understand a bit. getting cool air is a different story...

 

Leslie's scion seems to work pretty well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2fastGSR &raquo;</TD></TR><TR><TD CLASS="quote">
If i posted this in the wrong forum, please feel free to move it mods.

I am thinking about trying a set of ITBs on my H series All motor car. It is a dedicated track car.

I would guess that building a plenum of some sort with a scoop is probably the best way to get air to the ITBs on the track. I was thinking about just cutting the hood and using an STI hood scoop.

Just Looking for some insight/ ideas on what others may have used to get more air to their B/H ITB setup. If the answer is "build a plenum," then any tips someone can tell me on that too would be great.

Thanks in advance . .

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

this might not even help but heres a pic. actually might lose power? not sure....

but you could try it? build something similar maybe?

 

A rear facing cowl type hood and box would work, both leslie and dvs used them when they ran the b and h motors.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by matz03 &raquo;</TD></TR><TR><TD CLASS="quote">A rear facing cowl type hood and box would work, both leslie and dvs used them when they ran the b and h motors.</TD></TR></TABLE>

Actually when dvs ran the H ITB setup up they only used a forward facing cowl hood on the CRX. . .

I'd love to build a plenum box but i just have no idea how i would make it work on a H setup. I could probably make something out of fiberglass that would be a low lying forward facing scoop and then wrapped around the back of the hood, opening up right before the itbs, but I would imagine that would limit my hood opening.

Here is another idea i was contemplating. It will be hard to visualize but I will do my best to explain.
Cutting a square in the hood right about the ITBs. Use my existing 4inch (6.5 inch opening) Velocity stack. Face it forward a few inches off the hood. Make a fiberglass mold that basically holds the Vstack in place and channels the air down through the hood. Pretty much making a Hood scoop , but using a Vstack.

Think thats a better idea than the sti scoop ?

 

the crx never had a box. the coupe when it had a h motor didnt have one either until its mid season with the h motor.

there is alot of positive pressure on the hood line where it meets the wind screen. just a thought.

 

http://www.knowwhere2jeep.com/...,just a thought.GL

 

Yeah i have a picture of the setup on the old crx and its was just a cowl hood, forward facing opening.

Kevin i actially like that scoop. Thanks for the heads up man

I think i am going to just use an STI hood scoop and see what happens, then maybe mess around with building a plenum box around the ITBs, opening to the hood cut out , underneath the scoop at a later date.

 

Its better to give the ITB's access to dense air, rather than trying to ram it in there...

 

And how would you propose I do that ?

 

maybe turn the scoop backwards for dense air..

 

This is a b-series itb motor.should be same as h series.just a scoop home made.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MrParks &raquo;</TD></TR><TR><TD CLASS="quote">the crx never had a box. the coupe when it had a h motor didnt have one either until its mid season with the h motor.

there is alot of positive pressure on the hood line where it meets the wind screen. just a thought. </TD></TR></TABLE>
just got home from a 9 hours shift in the wind tunnel.... not near as much pressure as you might think... as for the cowl/air box on Mohler's car, I built that thing years ago, worked better than nothing at all, but not as good as feeding it from the bumper area...