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Strange question? I know. But I have a very important reason for asking. I'm looking to buy a new car and the IS300 is at the very top of my list. The luxury, suwheet styling and potential for power move it right to the top for me. And since my wife and I have our first baby on the way, I need something with four doors and room for a baby seat!

So, why do I ask? Well, I had the good fortune to test drive a new SRT-4 two months ago. As far as stock cars are concerned, its probably the most fun car I've ever driven. Its a rocket on rails. Somewhat comfortable. Not luxurious. And its a Dodge. And its a Neon. But even still at a price of $19,995 I was very, VERY seriously considering buying one. I actually test drove it twice. The second time I took my wife along for the ride and let her drive it as well. As we were returning to the dealer lot, I downshifted to 3rd on the exit ramp for a little engine braking. Needless to say, the muffler-less beast roared like a mountain lion. Now, it was loud and sounded cool and all. But I don't think my baby boy would sleep very well riding around town with me. It didn't sound like this all the time riding around but..

That brings me to my question. How loud do your IS300s sound after you put an aftermarket turbo kit on them? I would think the sound dampening in a Lexus would be far superior to that of a Dodge Neon. But I don't think most of the modded IS300s on here are riding around with muffled turbos since it increases backpressure, etc.

Riding around town, are they loud inside the car? I don't care much for what they sound like to the general public but more for hauling the baby boy around. Of course, if he's like his daddy, he'd probably like it anyways.

Thanks
 

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In general, most aftermarket exhausts for the IS300 are going to be louder than a stock SRT-4. There are a few which are quiet (L-tuned, blitz...Dragger was said to be pretty quiet). But when you go turbo, the exhaust is very important. Sure, you could use your stock exhaust with the turbo if you wanted, but it would just eat your power.

So, you'd probably have to get an aftermarket one. That, plus the extra engine noise, it's gonna be pretty loud. I think what you should do is PM "Gavron 1". He has a SRT Stage 2 turbo and has a L-tuned exhaust (quiet). Ask him how loud the exhaust is with the turbo...how loud the engine is with the turbo etc... I will go out on a limb and say that when you go turbo and have a bigger midpipe and downpipe, even with a L-tuned exhaust, it's gonna be louder than if it was on a stock IS.
 

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It depends on how loud you want it- If you have someone engineer an exhaust system that will kill off a lot of the noise, essentially all you will hear is the wooshing of the turbo, which is not loud and mean, rather sounds like wind whipping through trees.

My car is pretty loud. A lot of turbo cars are. But, it's the exhaust system that determines this, not the turbocharger. Get a nice quiet muffler put on your exhaust with a couple of resonators and you will be fine. You can make your exhaust quiet as stock if you are willing to pay money for a high-end muffler to slap on the end of your exhaust.

It's all up to the buyer.

-Chris
 

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from my experience with exhausts, if you have an exhaust system its sound is increased(duh) but when u add a turbo kit it becomes louder about 25-40%< in most cases. My best suggestion is to watch some dyno/turbo vids of is300's and study them.
 

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if you have an aftermarket exhaust and then you add turbo your car should be about 30-40% quieter coming out out of the exhaust. the turbo quiets down the exhaust. in most cases you can hear the turbo spool over the exhaust.
 

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Unless you opt for the open loop wastegate.
then it sounds like a jet.
I have video of my car in case you'd like to listen to the worst case scenario
 

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mikeeymikee said:
if you have an aftermarket exhaust and then you add turbo your car should be about 30-40% quieter coming out out of the exhaust. the turbo quiets down the exhaust. in most cases you can hear the turbo spool over the exhaust.
Mike is right- the turbine acts as "reflection" type sound repression. But, usually a turbo exhaust is at least 3", which is just so big and volumous that it's going to be loud despite the added sound repression the turbine offers. Cats and resonators help to repress sound also.

-C
 

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um..i found this video in a members signature..its got a stage 4 turboed IS. It should give u a run-down on how it sounds. Sorry if whosever video this is didnt want me to post it.

http://is300boost.com/Charles_IS300_Small(320x240).wmv
 

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my car is a bit of an anomoly, but here is some recordings

browse the directory


here is how it sounds currently with the new turbo

-gte






tnm said:
Strange question? I know. But I have a very important reason for asking. I'm looking to buy a new car and the IS300 is at the very top of my list. The luxury, suwheet styling and potential for power move it right to the top for me. And since my wife and I have our first baby on the way, I need something with four doors and room for a baby seat!

So, why do I ask? Well, I had the good fortune to test drive a new SRT-4 two months ago. As far as stock cars are concerned, its probably the most fun car I've ever driven. Its a rocket on rails. Somewhat comfortable. Not luxurious. And its a Dodge. And its a Neon. But even still at a price of $19,995 I was very, VERY seriously considering buying one. I actually test drove it twice. The second time I took my wife along for the ride and let her drive it as well. As we were returning to the dealer lot, I downshifted to 3rd on the exit ramp for a little engine braking. Needless to say, the muffler-less beast roared like a mountain lion. Now, it was loud and sounded cool and all. But I don't think my baby boy would sleep very well riding around town with me. It didn't sound like this all the time riding around but..

That brings me to my question. How loud do your IS300s sound after you put an aftermarket turbo kit on them? I would think the sound dampening in a Lexus would be far superior to that of a Dodge Neon. But I don't think most of the modded IS300s on here are riding around with muffled turbos since it increases backpressure, etc.

Riding around town, are they loud inside the car? I don't care much for what they sound like to the general public but more for hauling the baby boy around. Of course, if he's like his daddy, he'd probably like it anyways.

Thanks
 

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Mine isn't too loud, I have the Drager II, stock resonator pipe (coming off very soon!!!) and 3" downpipe to cat. Under normal driving and highway cruising, sound like just the Drager II drone and maybe a header, but on the throttle she screams like a mofo, but it's not a loud fart, thumpy sound, it's very smooth ripping sound.

I'll take sound clips when I get my PFS exhaust.


Kane
 

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SICK!!!




:p

IS300GTE said:
my car is a bit of an anomoly, but here is some recordings

browse the directory


here is how it sounds currently with the new turbo

-gte






tnm said:
Strange question? I know. But I have a very important reason for asking. I'm looking to buy a new car and the IS300 is at the very top of my list. The luxury, suwheet styling and potential for power move it right to the top for me. And since my wife and I have our first baby on the way, I need something with four doors and room for a baby seat!

So, why do I ask? Well, I had the good fortune to test drive a new SRT-4 two months ago. As far as stock cars are concerned, its probably the most fun car I've ever driven. Its a rocket on rails. Somewhat comfortable. Not luxurious. And its a Dodge. And its a Neon. But even still at a price of $19,995 I was very, VERY seriously considering buying one. I actually test drove it twice. The second time I took my wife along for the ride and let her drive it as well. As we were returning to the dealer lot, I downshifted to 3rd on the exit ramp for a little engine braking. Needless to say, the muffler-less beast roared like a mountain lion. Now, it was loud and sounded cool and all. But I don't think my baby boy would sleep very well riding around town with me. It didn't sound like this all the time riding around but..

That brings me to my question. How loud do your IS300s sound after you put an aftermarket turbo kit on them? I would think the sound dampening in a Lexus would be far superior to that of a Dodge Neon. But I don't think most of the modded IS300s on here are riding around with muffled turbos since it increases backpressure, etc.

Riding around town, are they loud inside the car? I don't care much for what they sound like to the general public but more for hauling the baby boy around. Of course, if he's like his daddy, he'd probably like it anyways.

Thanks
 

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When the wastegate opens up my car sounds like a beast.....Wait...it sounds like a beast all the time...and yes a PT-67 turbo spools pretty hard and LOUD! lol i love it
-Matt
 

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UnVme said:
When the wastegate opens up my car sounds like a beast.....Wait...it sounds like a beast all the time...and yes a PT-67 turbo spools pretty hard and LOUD! lol i love it
-Matt
Open loop wastegate? Are all toyomoto kits like that?

well I'll be damned... :lol:


Kane
 

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I just had a baby girl and I would not consider the IS300 a baby friendly vehicle. The trunk is too small to carry anything but the stroller and even that is hard to get in. Also, the back seat is very cramped. Once you put the baby seat in the back the person riding in the back with the baby will not be comfortable.

If you only have one car, as much as I hate to say this, the IS would not be the best choice. I almost sold mine but we decided to sell our other car instead. We are getting an RX300 for the wife and baby and I finally get the IS.

I know this answer has nothing to do with noise levels but hope it helps.

Don
 

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Kamikaze said:
I just had a baby girl and I would not consider the IS300 a baby friendly vehicle. The trunk is too small to carry anything but the stroller and even that is hard to get in. Also, the back seat is very cramped. Once you put the baby seat in the back the person riding in the back with the baby will not be comfortable.

If you only have one car, as much as I hate to say this, the IS would not be the best choice. I almost sold mine but we decided to sell our other car instead. We are getting an RX300 for the wife and baby and I finally get the IS.

I know this answer has nothing to do with noise levels but hope it helps.

Don
how true how true
 

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Benign said:
Kamikaze said:
I just had a baby girl and I would not consider the IS300 a baby friendly vehicle. The trunk is too small to carry anything but the stroller and even that is hard to get in. Also, the back seat is very cramped. Once you put the baby seat in the back the person riding in the back with the baby will not be comfortable.

If you only have one car, as much as I hate to say this, the IS would not be the best choice. I almost sold mine but we decided to sell our other car instead. We are getting an RX300 for the wife and baby and I finally get the IS.

I know this answer has nothing to do with noise levels but hope it helps.

Don
how true how true
That is so true, needed a bigger car for my little girl, I gave my IS300 to my little brother to take over and was driving my wife's corolla for a while (bought her the element and was seriously thinking of the g35). As it turns out my brother flaked on me and I got my car back after only 3 weeks, my wife has the element (we like it and I don't car if you think it's fugly) and I am going to have a boosted car soon! This car would not be good for a starting family unless you're both 5' tall and thin!
 

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I will have video up soon of my car so everyone can hear it. :p

Sounds mean as hell tho. :D
 
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