850Combat wrote: My 1965 Lotus 7 does it, and with flames out the left side of the car right bext to me. Super short exhaust system, Weber carbs rich at idle, not much of a muffler and no Cat. The clamps where it goes from 2 tubes to 1 leak a bit, and that helps too, I'm sure. It gets old on the road. I've only owned it 29 years, and I'm thinking I should do something about it.
I can turn it on and off with one setting of my ECU on my Lotus 7 replica. I've never turned it off 
My vette kackles thru the side pipes but it is carbed, and runs a bit rich. Then there was the time number 6 spark plug wire came loose and loaded the hot pipes with fuel.... it sounded like a cannon going off!
Madhatr wrote: Then there was the time number 6 spark plug wire came loose and loaded the hot pipes with fuel.... it sounded like a cannon going off!
I had one of those recently... Heater hose failed and sprayed the dist, which made it miss for a second and then catch again. The resulting backfire was big enough that I saw glowing chunks of cat media hit the road behind me 
rslifkin wrote:I had one of those recently... Heater hose failed and sprayed the dist, which made it miss for a second and then catch again. The resulting backfire was big enough that I saw glowing chunks of cat media hit the road behind meWow.... fire in the hole!
Madhatr wrote: My vette kackles thru the side pipes but it is carbed, and runs a bit rich. Then there was the time number 6 spark plug wire came loose and loaded the hot pipes with fuel.... it sounded like a cannon going off!
I had a CBR900RR sport bike with a aftermarket exhaust. It was before fuel injection made it to all bikes. One day by accident I found out if you hit the kill switch when moving and then turn it back on it will make a big pop. Then I found out if you hit the kill switch and hold the throttle open, you can make you friend riding behind you almost pi$$ his pants with a loud blast and flames.
Good times......
My Saturn SL 2 did it, and I'll be honest I thought it sounded great, when the weld at the muffler broke through. I drove it for hundreds of miles thinking I had a hole, and wasn't going to fix it until I got a ticket cause I liked the noise
Not that this is good advice but just unplug the throttle position sensor. I had a 94 with a non working TPS/unplugged and it would crackle when you let off the throttle.
I have had two cars with it.. one was my 74 Superbeetle that was type 4 powered. Big cam, twin carbs, very short exhaust made for flames on acceleration of up to a foot out the exhaust and nice crackle and pops on overrun.
My Fiat spiders always did it too.. no flames on acceleration, but on overrun at night, you could see the flashes of light from the flames popping from the exhaust. It was fun for a 20something year old.. might make 45 year old me giggle for a while
The original question was how to get that wonderful sound in a Miata. I've spent a significant amount of time looking into it and there are a number of posts on miata.net asking the same question. You can google "make miata sound like SRT-4" to find them. Long story short is that it's not really possible-at least from my research. I've listened to dozens of Miata exhaust videos on youtube and never really found anything that quite did it-even the turbo versions. You could try a straight pipe or maybe a glasspack, but it will be tough to make the same sounds as a carbed motor or big V8.
If anyone knows of a way to make this happen on a naturally aspirated answer then I'm sure the OP and I would both love to know.
Forte never really hada pop or crackle, but had what I would call a "burble" on decel and gear changes. The high-flo cat and 4-2-1 header took out some of that initially, but once all the exhaust leaks got sealed and it stopped running poorly because of them it's back. And it happens MORE now. So happy.
So I was out in my '01 Mustang Bullitt yesterday, which my son normally has at college, and noticed that it has the burble/crackle/pop under decel. In fact it's very prominent, and the only mod to the car is a flowmaster exhaust, which obviously amplifies it but doesn't cause it.
Contrary to most everyone here, I had a lot of popping, cracking, and fire due to a leak in the header at the cylinder head flange. I do have a Weber, header, and straight pipe side exit exhaust with no muffler or cat. It did this with frequency:
https://vimeo.com/99308024
bravenrace wrote: So I was out in my '01 Mustang Bullitt yesterday, which my son normally has at college, and noticed that it has the burble/crackle/pop under decel. In fact it's very prominent, and the only mod to the car is a flowmaster exhaust, which obviously amplifies it but doesn't cause it.
My '01 GT with the quieter Flowmaster does it, as well. I'm addicted to the sound of the exhaust in this car
My SVT Focus crackled and burbled all the time. It had a Magnaflow exhaust.
Groats wrote: The original question was how to get that wonderful sound in a Miata. I've spent a significant amount of time looking into it and there are a number of posts on miata.net asking the same question. You can google "make miata sound like SRT-4" to find them. Long story short is that it's not really possible-at least from my research. I've listened to dozens of Miata exhaust videos on youtube and never really found anything that quite did it-even the turbo versions. You could try a straight pipe or maybe a glasspack, but it will be tough to make the same sounds as a carbed motor or big V8. If anyone knows of a way to make this happen on a naturally aspirated answer then I'm sure the OP and I would both love to know.
Have you tried the suggestion of disconnecting the idle switch? I'm not going to do it for you, I'm not running on a stock ECU. For me, it would just be a matter of a software setting in the Hydra or Link.
Exhaust leaks cause it, mostly. Air getting sucked into the exhaust reacting with any residual fuel.
When I went to a good exhaust system on my RX-7 it stopped cracking/banging/popping entirely. Even with an ignition cut flat shift!
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