2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

who makes dual head intake Y pipes?

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Old Jun 22, 2003 | 12:29 AM
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From: Garland, Tx
who makes dual head intake Y pipes?

I've seen them for GM cars and trucks and a 300z turbo. But I can't find who makes it. I want a dual head Y-pipe. With dual 3" intlets that combine to a single 3" outlet and then I also need one that combines to a 4" outlet. Does anyone no who makes the pipe?

I don't want a kit, just the y pipe.
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Old Jun 22, 2003 | 01:52 AM
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Hmmmm. Somewhere in this equation will be your mass airflow sensor, unless your FC has a standalone fuel management system. Where were you planning on using the Y pipe, before the airflow meter with two filters collecting into a 4" pipe leading to the mass airflow sensor?
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Old Jun 22, 2003 | 11:10 AM
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Same answer I got on the WRX forum

Originally posted by 88IntegraLS
Hmmmm. Somewhere in this equation will be your mass airflow sensor, unless your FC has a standalone fuel management system. Where were you planning on using the Y pipe, before the airflow meter with two filters collecting into a 4" pipe leading to the mass airflow sensor?
I want to use it before the MAF sensor, just use two filters instead of one, that's all.
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Old Jun 22, 2003 | 11:29 AM
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You might need the y pipe to collect into a 3" diameter for the simple fact that the mass airflow sensor is much too small to use a 4" inlet pipe. Most adapter plates I have seen for mass airflow sensors are 3" diameter, and even that is much larger than the inside flow area of the sensor. Sorry to say I don't know where you could buy a y pipe like that.
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Old Jun 22, 2003 | 11:52 AM
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the 4" is for another car, 3" for wrx and rx7

Originally posted by 88IntegraLS
You might need the y pipe to collect into a 3" diameter for the simple fact that the mass airflow sensor is much too small to use a 4" inlet pipe. Most adapter plates I have seen for mass airflow sensors are 3" diameter, and even that is much larger than the inside flow area of the sensor. Sorry to say I don't know where you could buy a y pipe like that.
I was hoping someone new of a site that sells them. I don't need the engineering support just the site. Has anyone seen them forsale. I've seen them on 300zx CAI that place the two filters in the nose just aboce the opening in the bumper. I also saw a kit for hte vette a while back. I can't remember who made it but they use those blue KN type filters.

So has anyone seen anything remotely similar to what I'm talking about?
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Old Jun 22, 2003 | 12:50 PM
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http://www.burnsstainless.com/MergeC...into1base.html
http://www.burnsstainless.com/Crosso...rossovers.html
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Old Jun 22, 2003 | 03:34 PM
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Given the lack of aftermarket supports for FC's, the chances of finding something that'll fit are slim. Having one custom made would probably be easier.

This must be for looks, because it really is overkill. Apart from trying to squeeze two filters into the engine bay, the pressure drop through one big pod filter is tiny. Personally I'd spend my money on something more productive.
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Old Jun 22, 2003 | 03:43 PM
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ya i dont see the reason being for having 2 filters. theres no hp gains in 2 filters. its kinda ricy IMO but ok. its almost like faking the fd TTs.

what is ur purpose for doing this type of project?
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Old Jun 22, 2003 | 04:36 PM
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dang...

Originally posted by rx7raca
ya i dont see the reason being for having 2 filters. theres no hp gains in 2 filters. its kinda ricy IMO but ok. its almost like faking the fd TTs.

what is ur purpose for doing this type of project?
I have a ford power stroke that has 4" inlet. I rather run 2 standard 3" filter's than a single 4". Plus the 3" is smaller to work with. I probably won't put on the 7 but the WRX I will. I want one filter outside in the CAI and the other in the engine bay as a POD. If I want to run one or the other or both it's an easier mess to manage. Plus If both filters get dirty I won't have to change them as often.

So again has anybody seen the y-pipe for sale anywhere.

ohh. yeah, If you run a cone filter that works well (trapping dirt particles it is a restriction at higher HP. That is why the top rag cars don't run a filter.

Last edited by wrxfc3s; Jun 22, 2003 at 04:43 PM.
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Old Jun 22, 2003 | 04:42 PM
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OK... here is a pic. I don't want

tHE WHOLE KIT JUST THE y-PIPE

http://shop.store.yahoo.com/racinglab/volairinsys1.html

This one is made by volant...



Originally posted by NZConvertible
Given the lack of aftermarket supports for FC's, the chances of finding something that'll fit are slim. Having one custom made would probably be easier.

This must be for looks, because it really is overkill. Apart from trying to squeeze two filters into the engine bay, the pressure drop through one big pod filter is tiny. Personally I'd spend my money on something more productive.
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Old Jun 22, 2003 | 06:42 PM
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Re: dang...

Originally posted by wrxfc3s
ohh. yeah, If you run a cone filter that works well (trapping dirt particles it is a restriction at higher HP. That is why the top rag cars don't run a filter.
The bulk of the air filter restriction is caused by the stock design which is intended to reduce intake noise. While all filters do in fact create a restriction, it is very minor. A properly-designed intake and filter can out-flow a filterless air horn (aka velocity stack) intake like you see on some of those drag cars. Too bad they run a carb and can't monitor the manifold pressure real-time like those of us with a standalone EMS can.

Actual test data by A. Graham Bell:

Flow of 850cfm Holley carb @ 1.5" Hg
823cfm Carb only
839cfm Carb + Air Horn
853cfm K&N filter with Stub Stack

Read more about it here:
http://www.allbookstores.com/book/1859604358
(Warning: Piston engines only, but still lots of good info)
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Old Jun 22, 2003 | 08:50 PM
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Re: Re: dang...

[QUOTE]Originally posted by Evil Aviator
[B]The bulk of the air filter restriction is caused by the stock design which is intended to reduce intake noise. While all filters do in fact create a restriction, it is very minor. A properly-designed intake and filter can out-flow a filterless air horn (aka velocity stack) intake like you see on some of those drag cars. Too bad they run a carb and can't monitor the manifold pressure real-time like those of us with a standalone EMS can.

Actual test data by A. Graham Bell:

Flow of 850cfm Holley carb @ 1.5" Hg
823cfm Carb only
839cfm Carb + Air Horn
853cfm K&N filter with Stub Stack



Wasn't really talking about top fuel or related. More along the lines of turbo imports with collectors running right to the turbo, typically through the headlight. And besides the above data which I'm not sure of what your refering too but my experience dictates otherwise. Now how do you measure flow unless you have a tube of some sort (velocity stack) I think that is subjective.


back to the subject, does anyone know where to get one of these?
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Old Jun 22, 2003 | 09:32 PM
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i feel dumber for reading your dual intake theory, thank you.
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