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Old 03-10-2012, 11:01 PM   #1
jollyblue84
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Member#: 292300
Join Date: Aug 2011
Chapter/Region: TXIC
Location: Leander Tx.
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01 GC8
blue

Default ej20g air intake upgrade?

I'm wanting to upgrade the air intake. What would be best? Thanks
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Old 03-11-2012, 03:33 AM   #2
eg33GC
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99 V4
EJ20K RS

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each affect maf scaling, which is bad.
if you have a rob tune use an apexi unit. all his tuning was done with that unit
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Old 03-11-2012, 01:26 PM   #3
jollyblue84
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blue

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Quote:
Originally Posted by eg33GC
each affect maf scaling, which is bad.
if you have a rob tune use an apexi unit. all his tuning was done with that unit
I don't have the rob tune at the moment but will soon. Should I wait?
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Old 03-11-2012, 01:49 PM   #4
sizzflair
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Location: Nolanville, TX
Vehicle:
1995 JDM STi RA ver2
2010 Exige S240

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I use an apexi unit
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Old 03-11-2012, 04:26 PM   #5
TommyAtomic
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1993 JDM WRX Wagon
Black

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Quote:
Originally Posted by sizzflair View Post
I use an apexi unit
I have the EJ20G Apexi intake on order. It's going on as soon as it arrives. I've seen and heard no bad things about it what so ever. Apparently the filter used is a superfine mesh with quite alot of extra surface area to prevent particulates and reduce intake restriction. Who knows if there is any truth to that. I'll find out after I install it. The main thing is that it ditches the restriction of the upper intake resonator.

Ditching the upper resonator is very good but from what I've read the lower intake resonator is actually a much larger intake restriction. So in a cold climate where ambient enginebay air temp is not such a big deal a pod filter like with the apexi is probably a good idea. In a warmer climate like california, nevada, arizona type temps it's probably best to get a little hands on and modifying the stock intake like they did here in this austrialian automotive mag I found a link to.

Read here:
http://autospeed.com/cms/A_1605/printArticle.html

The article is old. But so is the GC8-EJ20G so it should still be pretty good advise.

Last edited by TommyAtomic; 03-11-2012 at 05:03 PM.
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Old 03-11-2012, 08:25 PM   #6
69subaru360
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Location: Maine
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1995 WRX
1998 2.5 RS

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I just made one. It's a black coupler, maf adapter and a cone filter. I spend about $30 on it, 2 years later still working fine. Maybe someday I'll get the apexi one just for the jdm bling.

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Old 03-11-2012, 11:54 PM   #7
sizzflair
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Join Date: Aug 2005
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1995 JDM STi RA ver2
2010 Exige S240

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Quote:
Originally Posted by TommyAtomic View Post
I have the EJ20G Apexi intake on order. It's going on as soon as it arrives. I've seen and heard no bad things about it what so ever. Apparently the filter used is a superfine mesh with quite alot of extra surface area to prevent particulates and reduce intake restriction. Who knows if there is any truth to that. I'll find out after I install it. The main thing is that it ditches the restriction of the upper intake resonator.

Ditching the upper resonator is very good but from what I've read the lower intake resonator is actually a much larger intake restriction. So in a cold climate where ambient enginebay air temp is not such a big deal a pod filter like with the apexi is probably a good idea. In a warmer climate like california, nevada, arizona type temps it's probably best to get a little hands on and modifying the stock intake like they did here in this austrialian automotive mag I found a link to.

Read here:
http://autospeed.com/cms/A_1605/printArticle.html

The article is old. But so is the GC8-EJ20G so it should still be pretty good advise.
When I bought my car, it had the HKS unit installed. I read an article somewhere where they tested all the different filters. Long story short, the Apexi filter had the best filtering and did not need any oiling/maintenance versus the other units.

I've had no issue with my intake. I'm not running MAF anymore so I just have the filter with a 3" piping. I still have most of the Apexi intake parts (except the filter and other minor things). It's a solid unit. You'll be happy.
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Old 03-15-2012, 07:28 AM   #8
Subbiespeed
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2000 Impreza EJ20G
SRP

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I made mine as well
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