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I have a question.

Would it be feasible to put a hood scoop on the hood and increase cold air coming in? Or would there not be much benefit for the cost involved?
 

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I have a question.

Would it be feasible to put a hood scoop on the hood and increase cold air coming in? Or would there not be much benefit for the cost involved?
Feasible? Sure. Ugly and not really helpful? Definitely.

Intake air temps don't matter nearly as much as post-cooled air temps. Intake air passes through a bunch of hot piping and the super hot turbo before it reaches the intercooler which does the actual cooling. You're MUCH better off upgrading your intercooler to a bigger one or doing a FMIC. If you're running big HP numbers, you could also benefit from a water/meth injection system out there in Arizona.
 

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Nothing drastically new here on mine, I used 2.5" versus the 3" transition. Just some pics and part #s to share.

60 degree 2.5" pipe, painted gloss black.
http://www.ebay.com/itm/390477995915?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT

K&N filter RU-4860

2.5" silicone connector with t-bolts
http://www.ebay.com/itm/291270438057?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT






No performance difference that I can tell. A little bit more turbo sound under spirited acceleration. (if you really want to hear it spool - straight pipes!)
 

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What's holding your silicone connector to your MAF pipe?
 

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Good catch! Nothing at the moment.

The 72mm t-clamp was too small. I will probably end up with a normal cruddy worm gear clamp. Not sure if a 2.75" t-clamp will close that tightly. Granted the interference fit now is quite tight, I doubt it's going anywhere.
 

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The SAI is toast right now anyway. BCB Stage 2 on the way for a complete delete of the SAI system.

But yes there is no filtration on the SAI inlet with this setup. If needed there are K&N filters that will clamp onto the end of the SAI intake hose.
 

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Nothing drastically new here on mine, I used 2.5" versus the 3" transition. Just some pics and part #s to share.

60 degree 2.5" pipe, painted gloss black.
http://www.ebay.com/itm/390477995915?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

K&N filter RU-4860
Amazon.com: K&N RU-4860 Universal Rubber Filter: Automotive

2.5" silicone connector with t-bolts
http://www.ebay.com/itm/291270438057?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT






No performance difference that I can tell. A little bit more turbo sound under spirited acceleration. (if you really want to hear it spool - straight pipes!)

So I read through this thread (neat to see the evolution of the OP's idea). I dig using the stock air box... but what I dont get - is why open the top at all?? It looks like if you get the right filter size you can seal the entire thing closed.

I was thinking something like this:
http://www.scoobymods.com/showpost.php?p=21373&postcount=4

Put an adapter in the airbox to fit a cone inside it. No cutting required.
 

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So I read through this thread (neat to see the evolution of the OP's idea). I dig using the stock air box... but what I dont get - is why open the top at all?? It looks like if you get the right filter size you can seal the entire thing closed.

I was thinking something like this:
http://www.scoobymods.com/showpost.php?p=21373&postcount=4

Put an adapter in the airbox to fit a cone inside it. No cutting required.
Because the point is to hear the intake. This will not gain you any power any way you slice it.
 

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Because the point is to hear the intake. This will not gain you any power any way you slice it.
You think so? I'm just spit-ballin here, but...

I run a closed Volant: http://www.volant.com/3dkls/iddb/Tfile/FILE/intakes/installs/Nissan/12640_in.jpg

On my Nissan Truck - and the sucker is LOUD. So loud I went and changed the filter that came stock with the Volant to an AEM dryflow. Still sounds nice, but not super loud.

I would think if folks say a K&N panel provides some noise, that a cone - even sealed would add to it.
 

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You think so? I'm just spit-ballin here, but...

I run a closed Volant: http://www.volant.com/3dkls/iddb/Tfile/FILE/intakes/installs/Nissan/12640_in.jpg

On my Nissan Truck - and the sucker is LOUD. So loud I went and changed the filter that came stock with the Volant to an AEM dryflow. Still sounds nice, but not super loud.

I would think if folks say a K&N panel provides some noise, that a cone - even sealed would add to it.
It would be louder. I have a J&R panel filter and removed the snorkel to the box. It is louder. But for those who want MOAR LOUD they cut the box. You can likely find a filter to fit, but you have to hack up the box anyways because the tube is built into the lid.
 

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Because the point is to hear the intake. This will not gain you any power any way you slice it.
This 100%. Even the noise "woosh" increase is marginal.

But I have an open cat back exhaust, so you want to hear it spool go that way. Kind of like you hear all the turbine spool on straight pipe diesels. Same here as the Turbo acts as the muffler.

Now, I have the BCB Stage 2 installed and it will spool hard compared to stock. It is downright nasty in 3rd pulls!... Pulls so hard that the clutch is starting to slip on the roll-ons. For some reason will hold great in 1st and 2nd.

I'm getting off track, but really this is for looks/sound, nothing more.
 

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youtube

If you go on Youtube you can find where they did a dyno on a turbo car. Then they installed a cold air intake and ran the dyno again. MINIMAL GAIN (closer to zero)

They ran the same test on normally aspirated engines and the cold air made a big difference. If you want colder air, FMIC is in your future (maybe add water injection if it is really hot)
 

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This 100%. Even the noise "woosh" increase is marginal.

But I have an open cat back exhaust, so you want to hear it spool go that way. Kind of like you hear all the turbine spool on straight pipe diesels. Same here as the Turbo acts as the muffler.

Now, I have the BCB Stage 2 installed and it will spool hard compared to stock. It is downright nasty in 3rd pulls!... Pulls so hard that the clutch is starting to slip on the roll-ons. For some reason will hold great in 1st and 2nd.

I'm getting off track, but really this is for looks/sound, nothing more.
Boost is limited in 1st and 2nd. Not uncommon to get slip after a tune. Pressure plate is weak on these cars.
 

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OK so I have had this mod for awhile now and due to the heat in the engine bay the adhesive from the door edge protector I used has come loose and will not hold the protector to the trimmed edge of the airbox. Has anyone else had this issue and if so what did you use that will stay in place?
 

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A heat resistant adhesive? RTV?

 

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Orange Permatex 'sillycone' is the normal High Heat goop.
Isn't actually very high heat resistant in real life though.
Nor is it a reliable way to glue plastic bits. But no harm in trying.

The OEM setup starts to look pretty darned good...
when all the DIY 'problems' surface :)
 
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