NorCal (Bay Area) OFF-TOPIC Chat Thread - Page 361 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kaotic Lazagna · 09-12-2014, 04:42 PM

Quote:

Originally Posted by Clipdat

Does anyone know the reason for this? My only exhaust mods are a dual canister style catback exhaust. Both primary and secondary cats are still in place.

When I accelerate up to ~4k rpm in 2nd gear and then let off the gas, if I push every so slightly on the gas pedal when it's decelerating, I will get a series of semi-loud popping sounds/burbles that sound like deep rapid fire air puffs.

It's a pretty cool sound and I often find myself giving that tiny super slight amount of throttle on the decel in that 4k to 3k range to hear it. If I just let it decelerate normally without my foot on the pedal it doesn't happen.

So, I'm wondering why it would happen with the slight throttle input like that. Any ideas? Could this be harmful or damaging anything? I'm also curious to see if it will still happen after I flash my car with the OFT.

It kinda sounds like this Jaguar but less of an aggressive POP sound, more like deep "poof" sounds.

That's normal. You should get a catless header and no resonator and amplify that burble more

Although that burble/popping sound always happened to me on full decel without any gas input.

Pwolf · 09-13-2014, 07:03 AM

Took some pictures before recording new exhaust video...

Kaotic Lazagna · 09-13-2014, 12:39 PM

Anybody know what black spots under the driver side hood could be? I don't drive my car hard and just daily freeway/highway commute.

PMok · 09-13-2014, 03:05 PM

Quote:

Originally Posted by Clipdat

Does anyone know the reason for this? My only exhaust mods are a dual canister style catback exhaust. Both primary and secondary cats are still in place.

When I accelerate up to ~4k rpm in 2nd gear and then let off the gas, if I push every so slightly on the gas pedal when it's decelerating, I will get a series of semi-loud popping sounds/burbles that sound like deep rapid fire air puffs.

It's a pretty cool sound and I often find myself giving that tiny super slight amount of throttle on the decel in that 4k to 3k range to hear it. If I just let it decelerate normally without my foot on the pedal it doesn't happen.

So, I'm wondering why it would happen with the slight throttle input like that. Any ideas? Could this be harmful or damaging anything? I'm also curious to see if it will still happen after I flash my car with the OFT.

It kinda sounds like this Jaguar but less of an aggressive POP sound, more like deep "poof" sounds.

i don't know the reason for it, but I get the same kind of popping sounds on decel with my MR2 Spyder (has a fairly loud catback exhaust). I didn't really give it much thought before but now that I think about it, it's also typical when I am feathering the throttle a little.

BS Mode: I assume it has something to do with the design of the exhaust and a change in pressure of the exiting exhaust gasses, based on the RPM, load, throttle and air/fuel ratio.

Clipdat · 09-14-2014, 09:07 PM

Post up a pic.

Quote:

Originally Posted by Kaotic Lazagna

Anybody know what black spots under the driver side hood could be? I don't drive my car hard and just daily freeway/highway commute.

Kaotic Lazagna · 09-14-2014, 09:21 PM

Quote:

Originally Posted by Clipdat

Post up a pic.

I'll snap a pic tomorrow before I head off to work. Tried searching a googling, but nada.

Kaotic Lazagna · 09-15-2014, 01:33 PM

I'll post a pic later since I guess the file size it too big straight from the phone.

brz408 · 09-16-2014, 02:12 AM

Need my Brz to learn/sync a new set of tpms. Currently reading about ATEQ Quickset. What are my options at this point?

Sent from my iPhone using Tapatalk

Kaotic Lazagna · 09-16-2014, 02:33 AM

Quote:

Originally Posted by Clipdat

Post up a pic.

Here is a pic.

B2FiNiTY · 09-16-2014, 11:27 PM

Could just be road debris/tar.

I doubt it's any of your components melting or belts shredding.

MyRx · 09-17-2014, 11:02 AM

Can't help but ask, what dealership or new owner is expecting the new yuzu yellow FR-S 1.0 today/this week? Saw one this morning 5am on 680 Southbound on a transport along with other new Toyotas. It was before the 580/680 junction otherwise if I knew it exited 580, I'd call Dublin. I flew by it in the fast lane but from what I saw, dayum nice!!

finch1750 · 09-17-2014, 01:26 PM

Quote:

Originally Posted by MyRx

Can't help but ask, what dealership or new owner is expecting the new yuzu yellow FR-S 1.0 today/this week? Saw one this morning 5am on 680 Southbound on a transport along with other new Toyotas. It was before the 580/680 junction otherwise if I knew it exited 580, I'd call Dublin. I flew by it in the fast lane but from what I saw, dayum nice!!

Stockton told me around the 20th, so should be hitting all of norcal soon

Kaotic Lazagna · 09-17-2014, 02:44 PM

Quote:

Originally Posted by B2FiNiTY

Could just be road debris/tar.

I doubt it's any of your components melting or belts shredding.

It's weird since it's the second time these spots have appeared.

Kaotic Lazagna · 09-17-2014, 02:45 PM

Quote:

Originally Posted by MyRx

Can't help but ask, what dealership or new owner is expecting the new yuzu yellow FR-S 1.0 today/this week? Saw one this morning 5am on 680 Southbound on a transport along with other new Toyotas. It was before the 580/680 junction otherwise if I knew it exited 580, I'd call Dublin. I flew by it in the fast lane but from what I saw, dayum nice!!

I have two sitting at port. One a manual and the other an automatic. Then I have another stick awaiting production. We get to have three at my dealership. Mwhahaha

09-13-2014, 07:03 AM	#5042
Pwolf Senior Member Join Date: Sep 2013 Drives: 2013 GBS BRZ Limited Location: Sacramento Posts: 1,321 Thanks: 1,979 Thanked 1,380 Times in 560 Posts Mentioned: 120 Post(s) Tagged: 2 Thread(s)	Took some pictures before recording new exhaust video... __________________ The Burz

09-16-2014, 02:12 AM	#5048
brz408 Manny Join Date: Aug 2013 Drives: 13 WRB Brz Location: San Jose, CA Posts: 217 Thanks: 152 Thanked 52 Times in 40 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Need my Brz to learn/sync a new set of tpms. Currently reading about ATEQ Quickset. What are my options at this point? Sent from my iPhone using Tapatalk __________________

09-17-2014, 11:02 AM	#5051
MyRx Senior Member Join Date: Nov 2012 Drives: Flight 86 is now boarding. Location: CA Posts: 1,759 Thanks: 1,842 Thanked 1,502 Times in 700 Posts Mentioned: 230 Post(s) Tagged: 1 Thread(s)	Can't help but ask, what dealership or new owner is expecting the new yuzu yellow FR-S 1.0 today/this week? Saw one this morning 5am on 680 Southbound on a transport along with other new Toyotas. It was before the 580/680 junction otherwise if I knew it exited 580, I'd call Dublin. I flew by it in the fast lane but from what I saw, dayum nice!! __________________

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09-13-2014, 12:39 PM	#5043
Kaotic Lazagna Senior Member Join Date: Apr 2014 Drives: GR Corolla Location: Lathrop, CA Posts: 4,943 Thanks: 3,096 Thanked 3,028 Times in 1,865 Posts Mentioned: 40 Post(s) Tagged: 2 Thread(s)	Anybody know what black spots under the driver side hood could be? I don't drive my car hard and just daily freeway/highway commute.

09-15-2014, 01:33 PM	#5047
Kaotic Lazagna Senior Member Join Date: Apr 2014 Drives: GR Corolla Location: Lathrop, CA Posts: 4,943 Thanks: 3,096 Thanked 3,028 Times in 1,865 Posts Mentioned: 40 Post(s) Tagged: 2 Thread(s)	I'll post a pic later since I guess the file size it too big straight from the phone.

09-16-2014, 11:27 PM	#5050
B2FiNiTY JDM JUNKY Join Date: Aug 2013 Drives: NSX Location: United States Posts: 387 Thanks: 50 Thanked 101 Times in 73 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Could just be road debris/tar. I doubt it's any of your components melting or belts shredding.

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