Resonator delete
Thread Starter
Member
Joined: Feb 2005
Posts: 143
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From: Oklahoma
BMW 535i Turbo, E36 M3
Resonator delete
Hello,
I took my car to this auto shop earlier. I asked them what it would cost to remove the resonator and place straight pipe. They told me $130 but I knew that was a ripoff because forum members have said it should be about $40 because it is really simple. Anyway, does anyone have a stock vs. c32 without resonator sound clip? I'd love to hear the difference.
Thanks in advance.
I took my car to this auto shop earlier. I asked them what it would cost to remove the resonator and place straight pipe. They told me $130 but I knew that was a ripoff because forum members have said it should be about $40 because it is really simple. Anyway, does anyone have a stock vs. c32 without resonator sound clip? I'd love to hear the difference.
Thanks in advance.
Senior Member
Joined: Aug 2005
Posts: 329
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From: Phoenix, Az
02 C32R
no clip, but here is how to get it cheap: find your local scrap metal shop and make sure they have stainless steel pipe 3" dia, have them cut 3' long piece ($10 for the pipe is what I paid). Go to a local muffler shop, they will cut out the resonator, then install the SS pipe ($50 to install) and you are done..... Sound is nice, I wish it was a little louder, but too much more would be too loud...
Last edited by Dead Ringer; Sep 18, 2005 at 12:02 AM.
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From: Southern Cali (Ontario)
this mod is a no brainer... go for it.
the sound bite will not give you the sound at 80 mph or inside the cabin when cruising around.
you will get a better throttle response just with the mod alone. Add the green filters and you have a bit response through the whole rmp range.
its should run you no more than $50 bucks. Just tell them what you want to pay, if they refuse go to another muffler shop. Also ask them to guarantee their works for any leaks.
don't like it, put it back on for another $35 to $40 bucks.
My G35 sedan's OEM exhaust is louder than my C32 without resonator. This is a no brainer to every C32.
Keep in mind that Force Ind. cars perform better with less back pressure.
the sound bite will not give you the sound at 80 mph or inside the cabin when cruising around.
you will get a better throttle response just with the mod alone. Add the green filters and you have a bit response through the whole rmp range.
its should run you no more than $50 bucks. Just tell them what you want to pay, if they refuse go to another muffler shop. Also ask them to guarantee their works for any leaks.
don't like it, put it back on for another $35 to $40 bucks.
My G35 sedan's OEM exhaust is louder than my C32 without resonator. This is a no brainer to every C32.
Keep in mind that Force Ind. cars perform better with less back pressure.
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Super Member
Joined: Nov 2004
Posts: 570
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From: Los Angeles, CA
2006 BMW X5 4.8is and 2005 C55 AMG
Originally Posted by ricky.agrawal
Yeah you will lose a little bit of low end torque because of the lesser backpressure.
Out Of Control!!
Joined: Jul 2002
Posts: 28,933
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It'll apply to almost any car. That's pretty much the same reason you don't run straight headers either.
The trick is having a free flowing exhaust, with enough back pressure so that you don't lose low end oomph.
The trick is having a free flowing exhaust, with enough back pressure so that you don't lose low end oomph.
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
no idea how the resonator will affect back pressure. The AMG resonator is a perforated pipe with a box surrounding it.
do a search, I remember someone said the power increased by a little after the resonator's gone.
do a search, I remember someone said the power increased by a little after the resonator's gone.
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From: Southern Cali (Ontario)
correct the resonator is a straight pipe design, there is absolutely nothing blocking the gases from leaving through the resonator.
For natural aspired cars: yes you will loose Torque to gain higher RPM HP.
For force induction cars: you will gain both torque and Hp. With the amount of air coming in, the car breaths better with less restriction.
I have read 1 or 2 hp to the wheels with the resonator off. Add another 1 or 2 hp with with green filters = 3 to 4 RWHP for about $150 bucks. I'm not sure about the torque figures, but should be around the same. Keep in mind, the throttle response is much better.... atleast according to my experience.
For natural aspired cars: yes you will loose Torque to gain higher RPM HP.
For force induction cars: you will gain both torque and Hp. With the amount of air coming in, the car breaths better with less restriction.
I have read 1 or 2 hp to the wheels with the resonator off. Add another 1 or 2 hp with with green filters = 3 to 4 RWHP for about $150 bucks. I'm not sure about the torque figures, but should be around the same. Keep in mind, the throttle response is much better.... atleast according to my experience.
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Joined: Feb 2002
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C32 AMG
On C32, adding Green Filters, resonator bypass pipe and intake mainfold heat spacers adds about 8 HP and 8 TQ, as you can see from the graph below. Not a huge incerase, but for the money not too bad.
We will be offering these three items as a kit very shortly.
We will be offering these three items as a kit very shortly.
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From: Southern Cali (Ontario)
Vadim you are the man!
I just need the heat shields....
let me know when those become available... and can you post a picture how they look like?
8 hp RWHP should close to 10HP at the flywheel.
The other day i stopped to by EVOsport to buy my green filters. I can't wait until i get my EvO stage 1 done.
I just need the heat shields....
let me know when those become available... and can you post a picture how they look like?
8 hp RWHP should close to 10HP at the flywheel.
The other day i stopped to by EVOsport to buy my green filters. I can't wait until i get my EvO stage 1 done.
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Joined: Aug 2005
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From: Southern Cali (Ontario)
now I know how a simple resonator delete in our c32/slk32, K55's make make a difference....
I was reading the post from the SLK55 forum and came across the following.
https://mbworld.org/forums/slk55-r171/115533-evo-magazine-kleeman-k55-review.html
scroll down to the 204 jpeg scan.
read the 2nd paragraph to you left....
back pressure is not that good for Kompressors...
I was reading the post from the SLK55 forum and came across the following.
https://mbworld.org/forums/slk55-r171/115533-evo-magazine-kleeman-k55-review.html
scroll down to the 204 jpeg scan.
read the 2nd paragraph to you left....
back pressure is not that good for Kompressors...
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From: Socal
EVE
Originally Posted by Vadim @ evosport
On C32, adding Green Filters, resonator bypass pipe and intake mainfold heat spacers adds about 8 HP and 8 TQ, as you can see from the graph below. Not a huge incerase, but for the money not too bad.
We will be offering these three items as a kit very shortly.
We will be offering these three items as a kit very shortly.
. I'm assuming much applies to the smaller 1.8L as well? Sans the heatspacers (let us know when that comes out haha).flip
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From: SCV SoCal
2002 CLK430
Originally Posted by r3v1ls
Isn't it illegal to remove the resonator? Or am i confusing it with something else?
Originally Posted by mig888
I'm assuming much applies to the smaller 1.8L as well?
On an NA, if it has equal length tube headers of the correct diameter (going too big will impede flow) and tuned length (to aid scavenging in a usable rev range), removing the resonator (which would be an inconveniently placed low pressure zone) may make the car more powerfull and louder. If the exhaust manifold is a "frugal design", I wouldn't expect any performance improvement.
Last edited by MarcusF; Sep 19, 2005 at 11:06 PM.
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From: Louisiana
E320
Originally Posted by MarcusF
No, it's not illegal to remove a resonator. You may have it confused with the catalytic converters.
A C32 is a boosted car. Most reductions in exhaust backpressure on a boosted car result in a HP increase.
On an NA, if it has equal length tube headers of the correct diameter (going too big will impede flow) and tuned length (to aid scavenging in a usable rev range), removing the resonator (which would be an inconveniently placed low pressure zone) may make the car more powerfull and louder. If the exhaust manifold is a "frugal design", I wouldn't expect any performance improvement.
A C32 is a boosted car. Most reductions in exhaust backpressure on a boosted car result in a HP increase.
On an NA, if it has equal length tube headers of the correct diameter (going too big will impede flow) and tuned length (to aid scavenging in a usable rev range), removing the resonator (which would be an inconveniently placed low pressure zone) may make the car more powerfull and louder. If the exhaust manifold is a "frugal design", I wouldn't expect any performance improvement.
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From: City with Tall buildings!
C43/55,2k11 Volvo S60 T6AWD,2k Audi B5 S4,95 Eagle Talon Tsi AWD 500+awhp
Originally Posted by FrankW
Vadim, wat's manifold heat spacers? wat's the price on that thing?
The purpose of the spacers is to separate some of the radiant heat from the block from getting to the intake manifold thus allowing cooler temperatures to reside inside.
