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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 07-18-2009, 01:05 PM   #1
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current projects. *pictures*

Intake pipe is done, but now I need to finish up my heat shield so I can mount the catch can on the back.

I need to somehow piece this together haha. Catch can is just waiting for the heat shield.

this method does not work... any suggestions?

My new grill... haha

I don't know how I got it to fit.

painted the cross bar thing as well

I don't think it's too bad.
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Old 07-18-2009, 02:34 PM   #2
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Nice.

Pickup an o2 socket to get the sensor off.

Where'd you move the horns to?
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Old 07-18-2009, 02:51 PM   #3
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its tucked in, on the right of the interocooler. Still functional
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Old 07-18-2009, 03:49 PM   #4
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A crow's foot "socket" will also work, unless that's an "o2" socket.
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Old 07-18-2009, 04:27 PM   #5
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this gets me thinking... not that i'd need it [yet], but there's no reason you couldn't run two intercoolers right? one above the top of the bumper in the grill, and another below?

or would using the single large one, half covered up like that be more effective?
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Old 07-18-2009, 04:47 PM   #6
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Quote:
Originally Posted by nomadtw View Post
this gets me thinking... not that i'd need it [yet], but there's no reason you couldn't run two intercoolers right? one above the top of the bumper in the grill, and another below?

or would using the single large one, half covered up like that be more effective?
There's no reason to really ever have two intercoolers. One large one works great.
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Old 07-18-2009, 04:55 PM   #7
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There's no reason to really ever have two intercoolers. One large one works great.
in my mind, as a wannabe engineer, it seems like that extra air volume would cause additional lag, as when the turbo spooled up it would have to pressurize that additional volume before the boost hit fully, and that having two intercoolers, which had the same airflow cross section as the single big IC, but not having that section in the middle would be more ideal

can someone explain the bigger intercooler advantage in more difficult to understand language so i can understand it?
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Old 07-18-2009, 05:12 PM   #8
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running 2 intercoolers would be way more difficult, needing 2 y connections and then almost double the charge piping,also the extra piping would then make the volume of the whole intake system close to, if not more than the volume of a single large intercooler.
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Old 07-18-2009, 05:14 PM   #9
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oh yeah, nice work 9K Aero!
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Old 07-18-2009, 05:23 PM   #10
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Originally Posted by turbojohnny View Post
running 2 intercoolers would be way more difficult, needing 2 y connections and then almost double the charge piping,also the extra piping would then make the volume of the whole intake system close to, if not more than the volume of a single large intercooler.
hmmm i can see that, although i was assuming them run serially, which would cut down on the extra piping, also all of the air would have airflow and be cooled, instead of having the section in the middle which went through and basically wasn't cooled at all, other than through heatsinking....
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Old 07-18-2009, 05:40 PM   #11
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if you ran the IC's in either series or parallel, you would still have a bunch of extra charge pipe, running in series you would have to have a u from the outlet of one to the inlet of the other, and then more pipe from the second IC back to where you would have to connect the pipe to the TB.

i think running in parallel would actually use less piping and also be more efficient, because a y connection is less restrictive to air flow than a complete 180* bend.

either way you plumbed it you would need either 2 180* bends or 2 y connections.

so in my mind a parallel twin IC setup would be the more efficient of the 2, but still less efficient than a single large IC.
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Old 07-18-2009, 06:11 PM   #12
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if you ran the IC's in either series or parallel, you would still have a bunch of extra charge pipe, running in series you would have to have a u from the outlet of one to the inlet of the other, and then more pipe from the second IC back to where you would have to connect the pipe to the TB.

i think running in parallel would actually use less piping and also be more efficient, because a y connection is less restrictive to air flow than a complete 180* bend.

either way you plumbed it you would need either 2 180* bends or 2 y connections.

so in my mind a parallel twin IC setup would be the more efficient of the 2, but still less efficient than a single large IC.
but what about the ~5" of IC that the air is going through and not being cooled?
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Old 07-18-2009, 06:45 PM   #13
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honestly, one large intercooler with two pipes is MUCH simpler than two intercoolers, having some really custom piping that may not even fit. The difference in performance is not worth it.

@turbojohnny - thanks man!

EDIT: added one more picture
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Old 07-18-2009, 07:57 PM   #14
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Quote:
Originally Posted by 9k aero View Post
honestly, one large intercooler with two pipes is MUCH simpler than two intercoolers, having some really custom piping that may not even fit. The difference in performance is not worth it.

@turbojohnny - thanks man!

EDIT: added one more picture
please don't think that i'm trying to knock your setup, because i'm not. i'm just trying to figure out the absolute ideal setup...

i'll probably never ever be at the level that you're at, although i hope some day i will be
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Old 07-18-2009, 08:11 PM   #15
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@nomadtw - Yeah I know, its cool man. I'm just giving you some advice so you don't have to go through all the trouble of making a dual ic setup.
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Old 07-18-2009, 08:48 PM   #16
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the ~5" sitting behind the crash bar really isn't that big of a deal, the air passing through the intercooler is dispersed across a larger surface area, allowing the heat in the charge air more of an area to dissipate through. even though it is directly behind the crash bar, there is still some air moving through the IC. if you had a dual IC setup just imagine all of the extra pipe that the air is moving through that isn't doing much of anything to cool the air at all.
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