Is your mod exhaust too boomy??
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Altezza Club Of NZ/Australia->Altezzas - AS200 • AS300 • RS200 • Gita • IS200 • IS250 • IS300 • IS350 • IS-F->Interior • Exterior   |
Is your mod exhaust too boomy??| RS200AT |
Posted: Sep 26 2004, 08:22 PM
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 Lowered  Group: Std. Member Posts: 248 Member No.: 94 Joined: 26-September 04  |
This mod applies to the RS200.
When I had my HKS Hyper, the drone at 3k rpms would drive me nuts on long drives, so I figure I'd add more sound deadening material in. To geat an idea of how little dampening material is actuall used on a RS200, rap your knuckles on the tire well compartment from under the car. Inside the boot area, there is only about a 20cm X 20cm piece of anti vibration material on the inside of the rear quarter panel. At the recommendation of a local shop, I had Dynamat laid in the spare wheel well which put paid to about 50-60% of the drone. You can do even better by doing the quarter panel as well. For the cheapskates, blankets & pillows stuffed in there will work as well. And besides blankets & pillows can be used for other things too!!  |
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| lextcy |
Posted: Sep 26 2004, 09:27 PM
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 Sydney, IS300 Group: VIP Member Posts: 403 Member No.: 44 Joined: 13-August 04 |
How about the HKS silencer addon
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| RS200AT |
Posted: Sep 26 2004, 09:39 PM
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Lowered Group: Std. Member Posts: 248 Member No.: 94 Joined: 26-September 04 |
That defeats the purpose of having an exhaust in the first place, as it sucks power for quietness. |
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| lextcy |
Posted: Sep 26 2004, 10:27 PM
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Sydney, IS300 Group: VIP Member Posts: 403 Member No.: 44 Joined: 13-August 04 |
True, but that would be expected
In this post http://www.is300.net/forums/showthread.php...ht=hks+silencer the loss in hp due to the silencer was only max 3hp |
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| RS200AT |
Posted: Sep 26 2004, 10:57 PM
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Lowered Group: Std. Member Posts: 248 Member No.: 94 Joined: 26-September 04 |
3 hp is about 40-50% loss from a rear muffler section
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| Stephen |
 Posted: Sep 27 2004, 12:38 AM
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 Altezza Club of Australia TRD Parts & Accessories Group: Director Posts: 5,681 Member No.: 35 Joined: 10-August 04 |
Remember, exhaust loudness does not always equal power.
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| Sirnixalot |
Posted: Sep 27 2004, 06:19 AM
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 Paid-up Member Group: VIP Member Posts: 489 Member No.: 8 Joined: 5-August 04 |
no but inserts which cause a resistance to the exhaust gas velocity cause loss of power
-------------------- Damn you and your admin powers...damn you!
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| RS200AT |
Posted: Sep 27 2004, 06:14 PM
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Lowered Group: Std. Member Posts: 248 Member No.: 94 Joined: 26-September 04 |
^^ WORD!
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| 4ROLLN |
Posted: Sep 27 2004, 11:33 PM
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 Stock Group: VIP Member Posts: 179 Member No.: 13 Joined: 5-August 04 |
Theres also a myth that with turbo cars, a added silencer can stuff the turbo?
haven't been able to find proof though! but it makes turbo's sound ridiculously noisy! |
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| RS200AT |
Posted: Sep 28 2004, 12:27 AM
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Lowered Group: Std. Member Posts: 248 Member No.: 94 Joined: 26-September 04 |
Don't EVER use one of those in-tip silencers if you have a turbo! It'll create massive backpressure and could damage the turbo!  |
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| Sirnixalot |
Posted: Sep 28 2004, 01:32 AM
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Paid-up Member Group: VIP Member Posts: 489 Member No.: 8 Joined: 5-August 04 |
do you see how small the exits for those inserts are? They are like 1.5-2"
It would be worse than running an 2" exhaust because the 3" pipes behind it would have quite a bit more volume. And its not even a gradual decrease in diameter...its an abrupt wall. Look at it this way...its like having an elephant size turd exit through a humans butt....its hard work and puts alot of stress on the working bits. Elephant turd + elephant butt =  its works a whole lot better -------------------- Damn you and your admin powers...damn you!
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