JB4 + Catless Downpipe + Resonator Delete = OMG

ghostB48 · 07-20-2021, 06:18 PM

What's up everyone!

After a cool while of being pretty pissed that I couldn't ECU tune the car like past beloved bimmers, I decided to pull the trigger on the JB4. For this all I've got to say outta the box is that its nuts. I typically put 2-3.5 gallons of e85 and throw it on map 5 and wow is it a rocket.

After the JB4 I decided to get a VRSF catless downpipe to here some more pops and bangs while driving. After getting it installed there wasn't much of a difference until I actually learned how to get some noise out of the car when shifting with paddles. Timing it with the right RPM levels there are both some loud upshift farts and some nice pops while downshifting. However when driving around and downshifting, I could seriously hear the resonator (or as my mechanic called it secondary cats and resonator) seriously restricting the noise.

Here I am today, I just got the resonator removed a couple days ago and my only complaint is that I didn't do this any sooner. The car is now significantly faster and louder. I'm not too sure about my gas mileage yet but its all worth it. Very loud upshifts and downshifts now

JTYAMSHAYIN · 07-20-2021, 07:59 PM

Quote:

Originally Posted by ghostB48

What's up everyone!

After a cool while of being pretty pissed that I couldn't ECU tune the car like past beloved bimmers, I decided to pull the trigger on the JB4. For this all I've got to say outta the box is that its nuts. I typically put 2-3.5 gallons of e85 and throw it on map 5 and wow is it a rocket.

After the JB4 I decided to get a VRSF catless downpipe to here some more pops and bangs while driving. After getting it installed there wasn't much of a difference until I actually learned how to get some noise out of the car when shifting with paddles. Timing it with the right RPM levels there are both some loud upshift farts and some nice pops while downshifting. However when driving around and downshifting, I could seriously hear the resonator (or as my mechanic called it secondary cats and resonator) seriously restricting the noise.

Here I am today, I just got the resonator removed a couple days ago and my only complaint is that I didn't do this any sooner. The car is now significantly faster and louder. I'm not too sure about my gas mileage yet but its all worth it. Very loud upshifts and downshifts now

Share a video!

mike@x-ph.com · 07-21-2021, 09:30 AM

Quote:

Originally Posted by JTYAMSHAYIN

Share a video!

+1

Arbitration · 07-23-2021, 02:41 AM

Quote:

Originally Posted by ghostB48

What's up everyone!

After a cool while of being pretty pissed that I couldn't ECU tune the car like past beloved bimmers, I decided to pull the trigger on the JB4. For this all I've got to say outta the box is that its nuts. I typically put 2-3.5 gallons of e85 and throw it on map 5 and wow is it a rocket.

After the JB4 I decided to get a VRSF catless downpipe to here some more pops and bangs while driving. After getting it installed there wasn't much of a difference until I actually learned how to get some noise out of the car when shifting with paddles. Timing it with the right RPM levels there are both some loud upshift farts and some nice pops while downshifting. However when driving around and downshifting, I could seriously hear the resonator (or as my mechanic called it secondary cats and resonator) seriously restricting the noise.

Here I am today, I just got the resonator removed a couple days ago and my only complaint is that I didn't do this any sooner. The car is now significantly faster and louder. I'm not too sure about my gas mileage yet but its all worth it. Very loud upshifts and downshifts now

Definitely share a video clip!

JTYAMSHAYIN · 07-23-2021, 08:38 PM

Edit: disregard

JTYAMSHAYIN · 07-23-2021, 11:49 PM

Hate to highjack this thread but wanted to ask this question since you have the same VRSF catless downpipe.

So far I'm liking the sound, it's definitely louder and i like the extra Burbles. Only concern is I'm hearing the turbo a lot more at even low rpms. I know a Catless downpipe will let you hear the turbo more but it is this type of sound? Its like a more constant whine of it spooling and then i let off the gas and i can hear the air sucking. I'm use to the air sucking sound but is the more constant sound of turbo due to the Downpipe or Is it possibly a leak? Do you have a similar sound?

JTYAMSHAYIN · 07-24-2021, 04:06 PM

.

g20_shub · 07-27-2021, 09:24 PM

Quote:

Originally Posted by ghostB48

What's up everyone!

After a cool while of being pretty pissed that I couldn't ECU tune the car like past beloved bimmers, I decided to pull the trigger on the JB4. For this all I've got to say outta the box is that its nuts. I typically put 2-3.5 gallons of e85 and throw it on map 5 and wow is it a rocket.

After the JB4 I decided to get a VRSF catless downpipe to here some more pops and bangs while driving. After getting it installed there wasn't much of a difference until I actually learned how to get some noise out of the car when shifting with paddles. Timing it with the right RPM levels there are both some loud upshift farts and some nice pops while downshifting. However when driving around and downshifting, I could seriously hear the resonator (or as my mechanic called it secondary cats and resonator) seriously restricting the noise.

Here I am today, I just got the resonator removed a couple days ago and my only complaint is that I didn't do this any sooner. The car is now significantly faster and louder. I'm not too sure about my gas mileage yet but its all worth it. Very loud upshifts and downshifts now

Hope we can get a video !! Looking to do the exact same

ghostB48 · 07-30-2021, 04:43 PM

Quote:

Originally Posted by JTYAMSHAYIN

Hate to highjack this thread but wanted to ask this question since you have the same VRSF catless downpipe.

So far I'm liking the sound, it's definitely louder and i like the extra Burbles. Only concern is I'm hearing the turbo a lot more at even low rpms. I know a Catless downpipe will let you hear the turbo more but it is this type of sound? Its like a more constant whine of it spooling and then i let off the gas and i can hear the air sucking. I'm use to the air sucking sound but is the more constant sound of turbo due to the Downpipe or Is it possibly a leak? Do you have a similar sound?

Yes I've got a similar sound. Never actually minded it. I know if you get an intake that this sound is improved or even reduced depending on your liking.

JTYAMSHAYIN · 07-30-2021, 04:54 PM

Quote:

Originally Posted by ghostB48

Quote:

Originally Posted by JTYAMSHAYIN

Hate to highjack this thread but wanted to ask this question since you have the same VRSF catless downpipe.

So far I'm liking the sound, it's definitely louder and i like the extra Burbles. Only concern is I'm hearing the turbo a lot more at even low rpms. I know a Catless downpipe will let you hear the turbo more but it is this type of sound? Its like a more constant whine of it spooling and then i let off the gas and i can hear the air sucking. I'm use to the air sucking sound but is the more constant sound of turbo due to the Downpipe or Is it possibly a leak? Do you have a similar sound?

Yes I've got a similar sound. Never actually minded it. I know if you get an intake that this sound is improved or even reduced depending on your liking.

Thanks for the reassurance. I did double check and confirmed there was no leak yesterday. I think I'll add an intake next, have to decide which one.

07-20-2021, 06:18 PM	#1
ghostB48 New Member 2 Rep 12 Posts Drives: 2021 BMW 330i Join Date: Nov 2020 Location: Los Angeles, CA iTrader: (0)	JB4 + Catless Downpipe + Resonator Delete = OMG What's up everyone! After a cool while of being pretty pissed that I couldn't ECU tune the car like past beloved bimmers, I decided to pull the trigger on the JB4. For this all I've got to say outta the box is that its nuts. I typically put 2-3.5 gallons of e85 and throw it on map 5 and wow is it a rocket. After the JB4 I decided to get a VRSF catless downpipe to here some more pops and bangs while driving. After getting it installed there wasn't much of a difference until I actually learned how to get some noise out of the car when shifting with paddles. Timing it with the right RPM levels there are both some loud upshift farts and some nice pops while downshifting. However when driving around and downshifting, I could seriously hear the resonator (or as my mechanic called it secondary cats and resonator) seriously restricting the noise. Here I am today, I just got the resonator removed a couple days ago and my only complaint is that I didn't do this any sooner. The car is now significantly faster and louder. I'm not too sure about my gas mileage yet but its all worth it. Very loud upshifts and downshifts now
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07-23-2021, 08:38 PM	#5
JTYAMSHAYIN Second Lieutenant 241 Rep 287 Posts Drives: BMW 330i Join Date: Jul 2020 Location: North Cal iTrader: (0)	Edit: disregard
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07-23-2021, 11:49 PM	#6
JTYAMSHAYIN Second Lieutenant 241 Rep 287 Posts Drives: BMW 330i Join Date: Jul 2020 Location: North Cal iTrader: (0)	Hate to highjack this thread but wanted to ask this question since you have the same VRSF catless downpipe. So far I'm liking the sound, it's definitely louder and i like the extra Burbles. Only concern is I'm hearing the turbo a lot more at even low rpms. I know a Catless downpipe will let you hear the turbo more but it is this type of sound? Its like a more constant whine of it spooling and then i let off the gas and i can hear the air sucking. I'm use to the air sucking sound but is the more constant sound of turbo due to the Downpipe or Is it possibly a leak? Do you have a similar sound?
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07-24-2021, 04:06 PM	#7
JTYAMSHAYIN Second Lieutenant 241 Rep 287 Posts Drives: BMW 330i Join Date: Jul 2020 Location: North Cal iTrader: (0)	.
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