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Exhaust sound I want from VW

Firstboost

Firstboost

Go Kart Champion
Location
East Bay Area
That clubsport sounds like it has the APR crackle tune.
 
Firstboost

Firstboost

Go Kart Champion
Location
East Bay Area
A

ATR

Drag Race Newbie
Location
Baltimore
Car(s)
'17 Golf R 6mt
Firstboost said:
Oh interesting, thanks for that. I wonder if it has to do with the port injection system the ROW cars use.
Click to expand...
That's not why. APR found the ECM tweak that enables the pops and crackles that the factory had as default. It's all in the programing. If it was just port injection then it wouldn't be possible to enable on US cars.
 
The Fed

The Fed

Old Guys Rule
Location
Florida
ATR said:
That's not why. APR found the ECM tweak that enables the pops and crackles that the factory had as default. It's all in the programing. If it was just port injection then it wouldn't be possible to enable on US cars.
Click to expand...

I owned plenty of cars with port injection only and none popped. Even my carbureted cars didn't do it unless I shut off the ignition, pulled the choke, then turned the key back to on. As the car started it burned all of the excess fuel in the exhaust manifold. I mainly did it when a car was tailgating me, because it would also cause a huge cloud of black smoke. The only problem was it often popped so much it loosened the connection between the exhaust pipe and muffler. Didn't have band clamps for exhaust systems on mainstream cars then. Should have welded it but I was too lazy.

Too bad it's not something you can make a piggyback tune for, with built-in Bluetooth controllable from an app. Even if APR made it a stand-alone tune it still voids your warranty.
 
E

ecsta

Go Kart Newbie
Location
Toronto
Car(s)
2017 R
ATR said:
That's not why. APR found the ECM tweak that enables the pops and crackles that the factory had as default. It's all in the programing. If it was just port injection then it wouldn't be possible to enable on US cars.
Click to expand...

I thought they adjusted the fuel/etc to get it to crackle? It's just a tweak? So then every pop/crackle enabled tune should sound the same?

Is there any that do it on stage 1? APR will only enable it on Stage 2+.
 
A

ATR

Drag Race Newbie
Location
Baltimore
Car(s)
'17 Golf R 6mt
ecsta said:
I thought they adjusted the fuel/etc to get it to crackle? It's just a tweak? So then every pop/crackle enabled tune should sound the same?

Is there any that do it on stage 1? APR will only enable it on Stage 2+.
Click to expand...
From my understanding, only certain ECMs allow it the older mk7 say 15 and prior don't have this coded for the pops and crackles so it can't be enabled on certain ECMs. I do believe that APR also explains this in more detail.

As to why only their stage 2+ has the option that's something that only APR can explain.

As to how it actually works... To get the pops a bit of playing with timing and ignition results in the after fire or pops/crackles. Direct ignition when you think about it allows this to easily take place. That is a dash of fuel on the exhaust stroke with a bit of spark equals the pops and crackles.

*edit to add*
Here's the APR thread on the crackle tune:
http://www.golfmk7.com/forums/showthread.php?t=36959
 
The Fed

The Fed

Old Guys Rule
Location
Florida
ATR said:
From my understanding, only certain ECMs allow it the older mk7 say 15 and prior don't have this coded for the pops and crackles so it can't be enabled on certain ECMs. I do believe that APR also explains this in more detail.

As to why only their stage 2+ has the option that's something that only APR can explain.

As to how it actually works... To get the pops a bit of playing with timing and ignition results in the after fire or pops/crackles. Direct ignition when you think about it allows this to easily take place. That is a dash of fuel on the exhaust stroke with a bit of spark equals the pops and crackles.

*edit to add*
Here's the APR thread on the crackle tune:
http://www.golfmk7.com/forums/showthread.php?t=36959
Click to expand...

Is it only on Stage 2 because it kills your cat? With the secondary O2 sensor being disabled you wouldn't be able to tell.
 
E

ecsta

Go Kart Newbie
Location
Toronto
Car(s)
2017 R
The Fed said:
Is it only on Stage 2 because it kills your cat? With the secondary O2 sensor being disabled you wouldn't be able to tell.
Click to expand...

I mean lots of cars come with this sound stock, so it can't be the pop/crackle that destroy the cat on its own. So seems a bit odd..
 
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