Pops/Crackle Tune do damage to your brz? - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

bucketfoot · 12-21-2021, 10:29 PM

Quote:

Originally Posted by Tokay444

You know a backfire happens in the intake manifold, right? Not sure what the cat has to do with it.

Actually they can occur in either the intake or the exhaust system (afterburn).

Now I have no clue where the ones in a tuned 86 happen as I have no interest in being that kind of an @$$hole

soundman98 · 12-21-2021, 10:51 PM

Quote:

Originally Posted by Tokay444

You know a backfire happens in the intake manifold, right? Not sure what the cat has to do with it.

So how does the exhaust system amplify it? Because pop tunes have always been louder behind them...

Tcoat · 12-22-2021, 09:13 AM

Quote:

Originally Posted by bucketfoot

Actually they can occur in either the intake or the exhaust system (afterburn).

Now I have no clue where the ones in a tuned 86 happen as I have no interest in being that kind of an @$$hole

This ^
Backfires are any combustion outside of the cylinder where they belong. Can be on intake or exhaust side.
The most common way to get tuned backfires is by pouring excessive fuel into the exhaust so you can actually hear it.

tomm.brz · 12-22-2021, 11:50 AM

most pops and bang tunes are just ignition retard like the stock tune does on gear change, clutch pressing and sudden throttle change.... Not many touch the fueling

Also, stock cold start forces the ignition to -19 (-20 is the maximum limit hard coded into ecu, also the maximum timing which pops are put at)
And cold start also adds fuel (even if the ecu target a leaner 15.5, with the cold lot of fuel doesn't vaporize and burn) and since it also stratifies the injections, a lot of dumped fuel goes to the exhaust where it encounters the kat , pretty near the exh valves, I would say....since most of the reasons i've seen here from pops-haters is: it's not supposed to burn in the exhaust... but stock rom has plenty of moments where ignition is very retarded

I do not use them personally, but every guy I tune here in italy asks me for them , or for some type of insertable-with-a-button crackle at gear change.. and nothing wrong have happened yet

Tokay444 · 12-24-2021, 03:47 PM

Quote:

Originally Posted by bucketfoot

Actually they can occur in either the intake or the exhaust system (afterburn).

Now I have no clue where the ones in a tuned 86 happen as I have no interest in being that kind of an @$$hole

No.

Quote:

Originally Posted by Tcoat

This ^
Backfires are any combustion outside of the cylinder where they belong. Can be on intake or exhaust side.
The most common way to get tuned backfires is by pouring excessive fuel into the exhaust so you can actually hear it.

No.

Quote:

Originally Posted by soundman98

So how does the exhaust system amplify it? Because pop tunes have always been louder behind them...

I can't even.

Backfires are when the combustion comes BACK into the intake manifold. 99% of the time this results in catastrophic failure.
An afterfire is when your dumb pops comes AFTER the combustion chamber, in the exhaust.

mswbrz · 12-24-2021, 04:04 PM

Quote:

Originally Posted by Jcas

So, I feel there is a ton of controversy on whether or not this tune does truly do any damage to your brz? Basically I want to make this thread to get everyone's opinions on what it does to the car. From what i've heard it'll basically mess your cats up and basically make them useless. Possibly mess with your plugs and fowl them. Other then that I haven't much more negative effects. Anyone have experience or input?

Who uses cats these days lol jk jk
╭(◕◕ ◉෴◉ ◕◕)╮

Sent from my iPhone using Tapatalk

mswbrz · 12-24-2021, 04:05 PM

Quote:

Originally Posted by Grady

If you want backfires you should remove both cats anyway.

Yupp , cats = no pops or backfires

๏̯͡๏﴿

Sent from my iPhone using Tapatalk

mswbrz · 12-24-2021, 04:07 PM

Quote:

Originally Posted by tomm.brz

did someone actually get flames from exhaust while completely catless? i got only loud pops and never fire/flames

I got flames witn my Brz on delicious tune pops and bangs tune that is no longer avail ...

Sent from my iPhone using Tapatalk

gen3v8 · 12-24-2021, 04:09 PM

So Backfire, Misfire and (Afterfire which just sounds incorrect) or is it pops and crackles

soundman98 · 12-24-2021, 05:32 PM

wtf is afterfire... just it's called backfire because it comes out the back of the car...

Tokay444 · 12-24-2021, 07:19 PM

Quote:

Originally Posted by soundman98

wtf is afterfire... just it's called backfire because it comes out the back of the car...

No.

Tokay444 · 12-24-2021, 07:24 PM

PetrolioBenzina · 12-25-2021, 01:32 PM

Still waiting for someone who uses this dumbassery to explain why they do.

x808drifter · 12-26-2021, 03:56 AM

Quote:

Originally Posted by PetrolioBenzina

Still waiting for someone who uses this dumbassery to explain why they do.

To compensate for the small PP?

12-24-2021, 04:09 PM	#65
gen3v8 Barred Join Date: Oct 2020 Drives: My18 wrxsti My19 brzts Location: Botany Bay Posts: 1,144 Thanks: 730 Thanked 1,187 Times in 610 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	So Backfire, Misfire and (Afterfire which just sounds incorrect) or is it pops and crackles __________________ Wait until my Flex capacitor hits 88

12-24-2021, 05:32 PM	#66
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	wtf is afterfire... just it's called backfire because it comes out the back of the car... __________________ "The time you enjoy wasting is not wasted time"

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12-22-2021, 11:50 AM	#60
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	most pops and bang tunes are just ignition retard like the stock tune does on gear change, clutch pressing and sudden throttle change.... Not many touch the fueling Also, stock cold start forces the ignition to -19 (-20 is the maximum limit hard coded into ecu, also the maximum timing which pops are put at) And cold start also adds fuel (even if the ecu target a leaner 15.5, with the cold lot of fuel doesn't vaporize and burn) and since it also stratifies the injections, a lot of dumped fuel goes to the exhaust where it encounters the kat , pretty near the exh valves, I would say....since most of the reasons i've seen here from pops-haters is: it's not supposed to burn in the exhaust... but stock rom has plenty of moments where ignition is very retarded I do not use them personally, but every guy I tune here in italy asks me for them , or for some type of insertable-with-a-button crackle at gear change.. and nothing wrong have happened yet

12-24-2021, 07:24 PM	#68
Tokay444 Anti stance. Join Date: Feb 2016 Drives: 17 White 860. RCE Tarmac 2. RE-71RS Location: Not Canada Posts: 1,630 Thanks: 897 Thanked 958 Times in 547 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)

12-25-2021, 01:32 PM	#69
PetrolioBenzina Senior Member Join Date: Sep 2016 Drives: 17 86 Location: Oregon Posts: 1,671 Thanks: 75 Thanked 1,133 Times in 647 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Still waiting for someone who uses this dumbassery to explain why they do.

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