What makes a turbo sound this one???

[THEDirtyDseriesWOOT]

i have a 57 trim and ran it at 25 psi before my rod bearing spun.. it didnt make near that noise.. it makes that hgih optich whirr but not enough for the camera to even pick it up.. maybe just a shitty camera haha exhaust note drowns it out on the cam

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[TurboCoop]

It also has a lot to do with them being in a small room, with no filter on the turbo and it pointing straight up in the air. If it was on the street it wouldnt be nearly as loud. If you want the sound of the turbo to be heard then just leave an open DP, youll sound like a damn jet when you floor it...

[eg:R]

my turbo make that noise while going into boost and driving on freeway speed.

[vti2]

Here a B16 with a GT3071R on 20psi

http://www.b-ht.com/video/tu_ek4_org.zip

[ragethemachine86]

Originally Posted by TurboCoop

It also has a lot to do with them being in a small room, with no filter on the turbo and it pointing straight up in the air. If it was on the street it wouldnt be nearly as loud.

that's what i said when i saw the vid, but the turbo can be heard whining till redline. Granted its not as loud when your sitting behind the turbo, but it spools unnaturaly loud and can be heard even from the cabin.

[Silverbullet86]

anyone care to explain antisurge? What the hell is this

BOV is whats used to prevent compressor surge, it really looks like those holes on that compressor are there just to change the sound.

[b16sedan]

Originally Posted by Silverbullet86

anyone care to explain antisurge? What the hell is this

BOV is whats used to prevent compressor surge, it really looks like those holes on that compressor are there just to change the sound.

The holes in the compressor housing allow air inside the compressor inlet to bypass the wheels to prevent compressor surge when the turbo is moving at high speeds, different from how a BOV stops the compressor from stalling.

Originally Posted by cua0

i always thought that sound came from running high boost or nearing the efficiency limit of the turbine...

diesels have the sound pretty much from factory, but when you chip them and open up their exhaust they really scream.
i've heard a few high boost hondas make that sound as well as some low boost hondas with tiny turbos. this is what leads me to believe that the anti-surge housing doesn't have much to do with that sound.

this is just an observation though so i could be way off

Originally Posted by SPOOLINmatt

anti surge housing is not responsible for that sound, its just a sound that happens from some serious spool, my old t67 did it very nicely. lol.

Sorry guys you're off base here, the anti surge housing is absolutely responsible for how loud this turbo is. Go watch a video of a T51R car driving and listen to how loud that is. My buddies RX7 with a T51R at 12 pounds of boost sounds louder than my SC61 non ported shroud does at 25 psi. Cummins Diesels using Holset HX35's come with a silencer ring from the factory, and all it's doing is eliminating the anti-surge ring on the compressor housing, or making it much smaller. If your explanation was true, a GT30R being pushed to only 420 WHP and 13 pounds of boost would not be this loud.

[McLude2nR]

Originally Posted by b16sedan

The holes in the compressor housing allow air inside the compressor inlet to bypass the wheels to prevent compressor surge when the turbo is moving at high speeds, different from how a BOV stops the compressor from stalling.

Sorry guys you're off base here, the anti surge housing is absolutely responsible for how loud this turbo is. Go watch a video of a T51R car driving and listen to how loud that is. My buddies RX7 with a T51R at 12 pounds of boost sounds louder than my SC61 non ported shroud does at 25 psi. Cummins Diesels using Holset HX35's come with a silencer ring from the factory, and all it's doing is eliminating the anti-surge ring on the compressor housing, or making it much smaller. If your explanation was true, a GT30R being pushed to only 420 WHP and 13 pounds of boost would not be this loud.

Would it then be proper to assume that one could bolt an anti-surge compressor housing to a turbo such as an SC-61? Or would it be more feasible to just purchase a turbo that comes with that housing?

[boostincoupe]

Ahh, the T51R...

http://videos.streetfire.net/s...9.htm

[Dunc]

Originally Posted by boostincoupe

Ahh, the T51R...

http://videos.streetfire.net/s...9.htm

The T51R huh? McLude, just make sure you're at the shop when the Supra's getting tuned.....it has the T51R SPL on it. Hopefully I'll have the high def. camera by then to get some good footage.

[HiProfile]

Originally Posted by Soccerking3000

when i ran 24-27psi through my 57 trim it made that noise, anything below it it made more of a really loud whoosh noise constantly, and i didnt have any anti-surge housing or fancy shmancy crap

It could just be from maxing the turbo out. Once the outter fins go supersonic, everythign beyond that speed is mostly wasted energy. Once anything goes supersonic, its anyone's guess at how pressure waves and such will produce (odd) sounds from all the harmonics and whatnot.

For daily drivers, I much prefer just the 'woosh' from the snail sucking in mass quantities of air. Especially if your car is a sleeper. Supras & FD's are neither.

[b16sedan]

Originally Posted by McLude2nR

Would it then be proper to assume that one could bolt an anti-surge compressor housing to a turbo such as an SC-61? Or would it be more feasible to just purchase a turbo that comes with that housing?

You can order the SC61 from Precision with an anti-surge compressor housing, just call them up.

[nsxmatt]

I don't think there is anything wrong with using a turbo that makes a better noise. After all we build our cars to drive and enjoy them, if you have a choice pick which one makes you happy.

My Turbonetics 57 trim had a nice sound to it on open downpipe but my Sc61 just sounded like it was all motor even under boost. I didn't care much for the sound at all.

[b16sedan]

Originally Posted by nsxmatt

I don't think there is anything wrong with using a turbo that makes a better noise. After all we build our cars to drive and enjoy them, if you have a choice pick which one makes you happy.

I agree. People pick out wheels based on what looks better, and exhausts based on what sounds/looks better, so why not lean towards a BOV or Turbo that sounds better to make your car more enjoyable to drive.