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You're referring to the backfires. That's different. You want to shoot flames, get a flamethrower kit from AutoLoc. You're wanting backfires. Easily done with 12As.
lol yea i want the backfire. But im not sure on how to run the setup to do it. My firend has a 88 Na rx7 with a Hks high power exhaust and no cats and he can just be driving down the road and have a nice lil flamage going on. And hes not really "Backfiring" Theirs no loud pop and then fire he just out pops a flame. Its pretty cool.
Go on youtube, type in RX-7 and backfire, you'll see all kinds of "backfires". But, that's what it's called, whether there's a popping noise or not.
Most often a backfire is the result of an air leak in the exhaust system. For a moment when you up shift and often when you let off the gas, there is a temorary "over rich" condition with too much gas in the rotor chambers. This blows into the exhaust and if there is oxygen (air leak) then it explodes in the hot exhaust pipe. Without the air leak, it is cooled enough not to explode by the time it reaches the atmosphere in a tight exhaust. <---- This was a copied answer from Ask.com on how backfires happen because I'm so damn tired I couldn't think up the right way to word it out of my own brain.
Here's one way to get a very loud backfire and some flamage on command:
1. Get a straight-through exhaust with a header.
2. Remove all emissions.
3. Tune your carb rich.
4. This part is mostly technique. Start by coasting downhill in gear at 3500 RPM or so and shut off the ignition. Wait a couple of seconds, and then switch it back on. It may take a couple of tries, but you should get a loud boom and some flames depending on your setup. With a little practice, you should be able to do it on level ground or even uphill. Try varying the RPM, or the delay before turning the ignition back on, or giving it a little gas, see what works best.
Tailgaters hate me.
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"Dude, you're gonna set your bumper on fire!"
Mechanical secondaries followed by shifts or letting off the throttle rapidly plus a leaky exhaust has me shooting flames like no other. Also great amounts of fun to turn the car off and letting the engine free wheel. It's a bit louder than shooting off an unsilenced .50 cal 2 feet away, and with a larger flame front.
i got an 82 with all stock working emissions and smog pump, just a header and 2 1/4 pipe to a magnaflow and if i take it up to 6k rpm's, hold it there then pump the seccondaries a few times then let off it shoots a couple feet out the back. (i have mech secondaries)
EFI or carbed,perfect or poor running,rotaries will shoot flames,usually on decel or between shifts.Call it backfiring or not,its all the same thing......excess fuel entering the exhaust system.
The trick is deleting any direct obstructions to the exhaust flow.That means all the catalytic converters and any muffler with a baffled,convoluted interior.The downside is that combining no cats and straight through mufflers,makes for a LOUD rotary.You choose between flame throwing hooliganism or fully functional hearing........
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Home of the COMPLETED 1st gen RX-7 project.
Your results may vary......dont ask how long or how much.....Im tired, and the car needs waxing...
EFI or carbed,perfect or poor running,rotaries will shoot flames,usually on decel or between shifts.Call it backfiring or not,its all the same thing......excess fuel entering the exhaust system.
The trick is deleting any direct obstructions to the exhaust flow.That means all the catalytic converters and any muffler with a baffled,convoluted interior.The downside is that combining no cats and straight through mufflers,makes for a LOUD rotary.You choose between flame throwing hooliganism or fully functional hearing........
Exactly and well put
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1984 Mazda RX-7 GSL 12A with Mikuni 44 and only 60K miles!
1993 Mazda RX-7 Vintage Red base model ***SOLD***
2001 Mazda Millenia Emerald Mica ***SOLD***
EFI or carbed,perfect or poor running,rotaries will shoot flames,usually on decel or between shifts.Call it backfiring or not,its all the same thing......excess fuel entering the exhaust system.
The trick is deleting any direct obstructions to the exhaust flow.That means all the catalytic converters and any muffler with a baffled,convoluted interior.The downside is that combining no cats and straight through mufflers,makes for a LOUD rotary.You choose between flame throwing hooliganism or fully functional hearing........
I think the only time I got close to a couple backfire pops was when I was running open header (true open header: removed the pre-cats) and ran it hard. Otherwise, with my exhaust on (cat and muffler and pipe in place of pre-cats) I have yet to hear a backfire. I guess because of the cat and muffler.
Even with a straight through RB muffler,my single Bonez cat eats up all my flame.
I know they are there too......what with the streetport,glowing hot turbo and 800cc secondary injectors dropping fuel like there is no tommorow.But still,never even one little flame makes it to the tailpipe.
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Home of the COMPLETED 1st gen RX-7 project.
Your results may vary......dont ask how long or how much.....Im tired, and the car needs waxing...
The shoddy old exhaust on my red REPU could shoot flames large enough to light up trees in front of me at night. All straight through Rotary engineering glasspacks.
One time my brother was following me down a hill and I lit him up a few times. When we got to the bottom he informed me that my truck had a serious backfiring problem. I told him it's not a problem.
with my 1st 12a i had a RB header to two presilencers and an ebay muffler. that was all hat was done to the car. it would back fire like a MOFO! it became a spectacle to my friends. it would shoot out flames that were about 1-2'. i never had to do any of that shutting off your car BS. al you have to do is stay hard on the throttle for a bit and let off. if you want to do it while sitting still just hold the revs up for a few seconds(not high, like 3K) then rev it up and totally remove your foot off the throttle. i used to do that all the time.
that being said, my GSL i just had wouldnt backfire AT ALL. it had a straight through exhaust set up, no emissions, ugraded fuel pump, FPR, upgraded ignition, etc etc. i dont think it would do it due to the fact i had to tuned more towards lean and my ignition set up would burn the fuel a lot better.
so, get a straight through exhaust, a shitty ignition set up(heck, just disconnect your leading ignitor), make sure you have some fuel in the carb, and rev the hell out of it and let off.
once this gets boring, look to move on to bigger and better things.
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79' GS - 12a w/ RE exhaust, Dellorto 48, 2nd gen direct fire, MSD boxes, FD alt, Respeed: F/R coil overs, camber plates, TII F/R big brake kit, Moser axles, Tokico Illuminas, Hawk HPS pads, Racing Beat front sway bar, Work Equip 16x7 and 16x8 wheels
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