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Exact list of modifications needed to backfire and show flames. Solution unclear!HELP
Hi all,
I'd like to preface this by saying I have done my due diligence and I'm still struggling to find the modifications necessary to making my '88 S4 N/A SE spit flames.
I have heard:
Racing Beat race header
Racing Beat race pre-silencer
No cat and straight pipe all the way through
My questions are:
1. I can obtain the RB race header and pre-silencer, but where do I purchase a cat-delete pipe? I heard deleting the cat is bad for ports 5 and 6.
2. If I obtain the RB race header, RB pre-silencer, and the cat-delete, will the car still spit flames if I have the stock dual tip muffler?
3. Any more useful insight on how I can achieve my goal inexpensively?
Please don't hate. I am seriously struggling to find a CLEAR answer without people saying "just get a flamethrower kit" or "it's bad for your engine." It's not and is a normal characteristic of the rotary engine. I just need to unlock it
It also helps to have an exhaust leak somewhere in the system if you want flames on decel.
The reason is the exhaust leak pulls fresh air into the exhaust to combust the hot fuel laden air being pumped through the engine on decel.
Otherwise you have to pull the fresh air in all the way from the exhaust tip and sometimes it doesn't make it close enough to the engine where there is something hot enough to ignite it before the the engine rpms come down.
As mentioned you get this: Rotary Exaust Header for 86-92 RX-7 Non-turbo - Racing Beat and this: Presilencer for 86-88 RX-7 Non-turbo - Man Trans - Racing Beat
The pre-silencer even has the tube for activating your 5th & 6th ports and add the cat back of your choice. The mufflers must be straight through though. You could do the header and a straight pipe but you loose the means to activate your 5th & 6th ports. The pre-silencer also helps with the noise level and the tone of the exhaust.
As other have said the flames won't be massive and will happen at high rpm. Some of the youtube videos of cars shooting massive flames while just revving up or on the starting line are turbo cars with an anti-lag system on them. https://www.google.com/?gws_rd=ssl#q=anti-lag+system
No light coming from tips though? I get the occasional soft pop but never witnessed any light or flames
Idk, i'm never behind my car, and no one usually keeps up with me that i know to verify a flame lol. Sometimes its a pretty loud bang, so i would think there would be something
Just get the RB headers and pre silencer, delete the air pump and have a fabrication shop make you a straight pipe. Not a lot of people do mods specifically for the purpose of backfiring though, lol.
Here's the rear section of the exhaust on my T2, had my fabricator make a turn down exit for minimum bumper burnage. I have to say though, whenever I do drive my car on the street, it scares the living **** out of people when it backfires.
PS; are you in California? Are emissions laws not super strict over there???
I guess if one likes poorly tuned cars...Sure, the flames can be fun, but to spend all the time and trouble to totally switch the exhaust just go see the little pops an NA on the stock ECU spits out?
Note that an RB race header and RB race presilincer is going to be obnoxiously loud.
I would suggest at least adding another resonator near the back of the exhaust after the pre-silencer. A Vibrant "Ultra Quiet" resonator works quite well and it is still straight through. Then have another straight through muffler at the back.
There is nothing worse than a 150HP car that sounds like a 130dB swarm of bees approaching.
Just get the RB headers and pre silencer, delete the air pump and have a fabrication shop make you a straight pipe. Not a lot of people do mods specifically for the purpose of backfiring though, lol.
Here's the rear section of the exhaust on my T2, had my fabricator make a turn down exit for minimum bumper burnage. I have to say though, whenever I do drive my car on the street, it scares the living **** out of people when it backfires.
PS; are you in California? Are emissions laws not super strict over there???
Very nice looking exhaust pipe. Your fab guy know what he's doing. Also great choice in tires. Thats my favourite set of rubber.
Jegs or Summit Racing sells mufflers but you really want Stainless Steel packing whereas most of what they sell is fiberglass. I think Jegs sells the Vibrant muffler/resonators that Aaron Cake mentioned. I'd recommend quality mufflers or it will be really loud. People say good things about Borla.
I am running these cheap ebay mufflers on mine right now and though it will shoot little flames it is just borderline too loud with the RB header and pre-silencer as they have almost no packing and a 2.5" core.
Sure there is...any straight piped Harley or the sound of Sarah Palin's voice.
True. Especially since those straight pipes screw up the reversion such that it completely throws off carb/EFI tuning so those bikes actually make less power with the pipes vs. the stock exhaust. And of course so few people re-tune after installing the noise makers they just drive around in a cloud of unburned hydrocarbons.
Being in Canada, I haven't heard Sarah Palin since someone tried her in the primaries.
True. Especially since those straight pipes screw up the reversion such that it completely throws off carb/EFI tuning so those bikes actually make less power with the pipes vs. the stock exhaust.
A fact that is less than irrelevant to a Harley owner.
Just buying the bike advertises the fact that performance and handling are not priorities- sounding like the impending apocalypse at 30mph is the main/only point.
It's a good example of subconscious self-preservation...willing to admit it or not, Harley owners know that if their bike actually made any power, the brakes, suspension, tires and frame geometry would kill them.
I never modified my FC with the intention of spitting flames; this was always merely a byproduct.
If you're after flame spitting though, the exhaust I had that seemed to yield the most flames was a single exit exhaust. I've got duals and the flames aren't very entertaining; but the sound and performance is.
However, a friend of mine has a stock GXL with a cast manifold, and a 6PI pickup tube on the 2.25" downpipe right after the bend. He used to have one Magnaflow 6" round can, straight-through with 2.5" inlet/outlet. Around the center of the car the system stepped up from 2.25" to 2.5". Muffler was on the driver's side rear. No cat, no presilencer, no crush bends except for the one on the downpipe to increase the exhaust velocity for the 6PI. It made wicked flames; big enough you could see flash behind you on a dark road at night. 6PI worked flawlessly. I drove behind him in my FC a few times and it was very entertaining. Small blue pops on decel, large bright flashes between redline shifts.
The downfall of the entire system? It's illegal as hell, you are going to sustain hearing damage, and your neighbors will hate you just for starting the car. Needless to say, after one of his neighbors was ready to kill him, we later put a presilencer in. Magnaflow 22" long, straight through 4" can with 2.25" inlet/outlet. Flames were not as large after this, but they are still there. We did all this about a year ago and he is still currently running this exhaust and I have to say it sounds pretty good for what it is, and not too loud.
We used magnaflow because they are stainless, cheap, and have a lifetime warranty.
A fact that is less than irrelevant to a Harley owner.
Just buying the bike advertises the fact that performance and handling are not priorities- sounding like the impending apocalypse at 30mph is the main/only point.
It's a good example of subconscious self-preservation...willing to admit it or not, Harley owners know that if their bike actually made any power, the brakes, suspension, tires and frame geometry would kill them.
Hmm...that must be why the local Harley dealer tried very hard to dissuade me from buying a Buell. Which I ultimately didn't do, but for other reasons.
Hmm...that must be why the local Harley dealer tried very hard to dissuade me from buying a Buell. Which I ultimately didn't do, but for other reasons.
How about unplugging the fuel pressure regulator vacuum line and advancing the timing ?
#1 in that sentence would make his car not want to idle and #2 in that sentence would be sure to make him NOT shoot flames.
Advancing the timing will cause the engine to burn more fuel during useful combustion, therefore leaving less unburned fuel in the exhaust....or blow his engine up.
*DISCLAIMER!*
*The below paragraph is at your own risk if you don't know what the **** you're doing!*
You can actually snag a few more HP out of the NA if you bump your timing 1-2 degrees above the stock baseline value. It moves your power curve down a smidge in the rpm range, which is great on a street car, you just lose a tad bit of the very top end. I run 2 degrees advance over stock on my car. I do have full exhaust modification with ported and non baffled exhaust, and super mild street port on the secondary ports, primaries are stock. It makes for an interesting idle.
It really depends on your engine. +2 on mine makes more power, +2 on yours might blow yours up. Hell, some of you with turbo motors might make more power by retarding your timing.
Like I said, not responsible for you blowing you engine up!
06-30-16, 12:36 AM
