black plastic intercooler

[danyz250f]

what is the black resevoir / intercooler thingy that goes from the turbo to the stock smic.

 

[TJGoSurf]

A pic would be so much better man.

 

[MrBoxx]

I know what you're talking about. And I have no clue. When my uncle and I put my 14b on, the L-pipe replaced the stock S-hose AND that reservoir, but we could never figure out what it was for. My guess would be for oil/water/condensation/debris to collect so it doesn't go into the intercooler or intake manifold. I notice on many modern cars' stock air filter boxes, there are large, flat reservoirs on top, below, or just after the air box. I doubt it's for better airflow. I think I actually just threw the reservoir away.

 

[NixHex]

i think its a resonator. thats what that box is on alot of other cars intake tacts.

 

[HighPsi92GST]

S
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http://www.dsmtuners.com/forums/showthread.php?t=175320

 

[a_scobel]

S
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http://www.dsmtuners.com/forums/showthread.php?t=175320

It's not exactly an easy thing to find..what terms would you search for? 'Box'..'black box'?? .I don't blame him for starting a new thread. I had the same question a while back.
http://dsmtuners.com/forums/showthread.php?t=128360

 

[xucpxeclipsex]

..

 

[knighteclipse1]

that empty piece of plastic is called a Helmholtz resonator. And its just empty. Actually not: It's full of air. And although it looks like it can't have any real purpose, it does. It's there to reduce the noise your engine intake duct makes. Huh? It has an interior volume with a very specific resonant frequency, like an organ pipe. Preassure pulses traveling b ack and forth in the duct have a resonant frequency as well. A pressure pulse whipping past the entrance to the resonator(at the speed of sound) partially enters its cavity. The pulse then bounces off the far end of the resonator, and returns back to the duct a very short time later. By now the presssure pulse has traveled a half-wavelength farther along the duct. The pressure pulse re-entering will cancel out at least part of the negativie pulse at that point. The net result is reduced noise, at least at or near the resonant frequency of the resonator. Mancy car manufacterers use this technique to reduce intake tract noise. Some behicles have several of these devices in different places along the duct. Why do you care? This device should have no effect whatsoever on the performance of your engine, regardless of what your pats manager at the dealership claims.

 

[xveganxcowboyx]

It is a flow restriction and therefore has a negative effect on performance. It may be minor, but everything adds up.

 

[knighteclipse1]

It is a flow restriction and therefore has a negative effect on performance. It may be minor, but everything adds up.

October 2005 issue of popular mechanics magazine. It is as I said and nothing more. ZERO performance difference one way or another it is not a restriction in any way at all. PERIOD. oh yeah, its on page 128-130.

 

[xveganxcowboyx]

I'm not finding it on their web site, but perhaps it's not up.

If flow restrictions make no difference then why do hard pipes, larger intakes, exhausts, etc, make more power?

Or is it now a flow restriction? I don't see how it couldn't be. It is an extra chanber which diverts the smooth flow of air. It would seem to be similar to a chambered muffler vs a straight pipe and we all know that makes a difference.

Maybe it's just that they were not measure small enough differences or the situation was different. It should make more of a difference on a forced induction car than a N/A. Either way, it may be a fraction of a HP, but when combined with other things it should make some difference.

 

[knighteclipse1]

well, it is not a restrictor its a resonator, now I will grant you, it may divert a SMALL amount of air, but I would put title down on it that its not enough to make a measureable difference on a dyno. All things being equal, It would have to be proven to me. And I don't believe anyone can in all honesty do that. Alot of ppl do alot of things to there vehicles that don't make sense. I believe in removing it, it will give you a much better sound if your looking for performance. But the manufacturer wasn't looking for that they were looking to make a car that would appeal to the masses not just gearheads like us. I personally would remove it for the sound, but not because I believe it would give me a meassurable amount of performance. I tell you what, When I get the new engine in my Talon I will try it with and without on a dyno and post the results for everyone to see. then we will know once and for all. Is that fair?

 

[xveganxcowboyx]

I wouldn't go that far. I don't think it would be enough to measure on a dyno. Or rather, it may show up as a better hp or torque curve or slightly higher peak power, but it would not be enough of a difference to rule out other factors. (heat, humidity or just plain chance). Not to mention you would have to replace the space it takes with something which will introduce another factor to calculate.

I don't think it diverts too much air either, but any interuption in an otherwise smooth tube will create a chaotic flow pattern which will reduce flow efficiency. Think about it this way, if you were to swap out the intake pipe with one of the same diameter, but make it out of well polished metal would you expect better power and throttle response? I would for the simple reason that you've reduced inconsistencies in the tube. The same logic applies. Again, the difference may be small, but it all adds up and compounds.

And I agree, with something that small the best reason to remove it is a throatier sound.

 

[Jafro]

In many applications, the Heimholz silencer will not impede any sort of performance; however, on a 95-96 DSM, the inner diameter of the silencer box's thick plastic hose connections are almost a half-inch thinner than the hoses that connect to it. That in itself is a restriction and, without question, will cause loads of turbulence.

Don't just slap a section of exhaust pipe in there like the other thread reccommends. Get a bead rolled on both ends of the exhaust pipe before going that route. Those hoses are almost always saturated with oil because of blow-by from the crankcase breather hose (which routes into your intake). Once that's good and soaked into the hose, good luck with keeping it clamped together when you turn the boost up. I blew mine off 5x in a mile at only 16 PSI. Your car will not run anymore when this happens (unless you have a blow-thru GM MAF... in which case, you probably don't have a T-25 or stock intercooler piping anymore). I noticed a lot of throttle response improvement until that started happening.

It is a restriction on a DSM... but in principle, it wouldn't be as long as the inner diameter of the hose/pipe are the same... so Popular Mechanics is still right.

 

[danyz250f]

WOW thanks for all the respose guys i didnt ecpect to get all this feedback.


p.s. i did search for like 20 minutes and got frusterated so i started a new post.