stealth

[~Spadwaller~]

I love my car its quite, runs like a cheetah, and has a sweet @$$. The mechanic says he can't even tell when the car is on cause its soo quiet I dunno if this is a good or a bad thing but, does anyone know of any mods to make is quieter while gaining performance?

[Jon11582]

Stock its REALLY quiet. Eeriely quiet. I remember when I first got it, I tried starting it up before when it was on already.

I dont think theres anything to gain performance without gaining noise. Maybe use higher octane gas and gas additives? Thats about all I can think of.

[ICrazyChrisI]

See it this way, quiet = restrictive.

[Whatever]

haha my friend who has a M3 once told me that my car is quite as well.

[JoeB]

Gaining performance and keeping it quiet is very difficult. It seems the Toyota engineers did a good enough job of that from the start. The car was really marketed to middle aged folks like me. Someone who wanted to be able to accelerate quickly when needed but needed to be very comfortable and quiet. Oddly enough, when I selected the car, that was one of the selling points. Couldn't hear it run, couldn't feel it shift.

Somewhere along the line all that changed ! The real power restriction with the car is its breathing. As soon as you start to open up the breathing restrictions, you get noise. Weather its the intake or exhaust.

Getting more power is a fairly simple equation, you need more fuel and air and enough spark to burn it. The fuel is useless if you don't add air so lets start there. The only way to get more air in there quietly under normal load is the sc. Even that makes a kinda gear rattling noise at idle. Most of which is absorbed in that noise/heat blanket under the hood. Under normal driving, the noise is the same. Once you punch the gas though, the high pitch whine comes from the sc - instant respect!

Now for fuel. With the stock 4psi, the ECU will request the extra fuel and the stock fuel system can keep up. If you wanted a safety net, I would consider Jim's fuel upgrade kit (filter and lines). That is all that is needed at that level of boost. With the sc, you'll need to run at least 91 octane fuel. High octane without the sc is a waste, the car doesn't need it.

Spark is very easy. Upgrade to Denso IK-22 plugs. They are a little colder than the stock plugs and will handle the sc better. No need to change the wires, the stock Toyota wires are actually very good quality. The coil packs are very good too.

So as long as you don't touch the intake/exhaust and you do all that, you should be pretty quiet. Trust me though, once you get started, there's no turning back. Next the noise will be welcome and you'll start seeing a side of the car that was overlooked. -JoeB

[Duffman]

[quote="Jon11582"]Stock its REALLY quiet. Eeriely quiet. I remember when I first got it, I tried starting it up before when it was on already.[quote]

Good, I'm not the only one who's done that.

[SleeperSolara]

See it this way, quiet = restrictive.

I second that.
There is no way to keep your car quiet while gainin' performance.

[WTF??]

There is "supposedly" a small gain (you cant feel it) but you can change your air filter... go with K&N or TRD...

but its overall better to go with K&N since you can reuse it for a longazz time

[Astro]

Trust me though, once you get started, there's no turning back. Next the noise will be welcome and you'll start seeing a side of the car that was overlooked. -JoeB

So true, hahaha!

[Jon11582]

SCings going to add noise. Even the K&N drop in adds a tiny bit of noise, or so I've heard. Can anyone verify?

[Jai_Jai_Binks]

i remember the first time i drove an LS400, i was shocked...by far that is one of the most 'stealtiest' cars ever..

[bassthrive]

the first time my ex got in my car she laughed and said "we're not going anywhere if you dont turn the engine on" so i pulled out of the parking spot and she just said "oh... well thats real quiet!"

since installing my k&n (throatiness on revs) and cat-back (deeper, sweetly mellow) you can definately hear the engine more, but its no where near the point of being obnoxious.

[thealkimo]

i like loud...