You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Backfire??? haha...
- Thread starter Omar MSP
- Start date
My Vibrant does it too. I get little backfires very regularly around town, and occasionally get the big ole 12 gauge shotgun blast. I'm used to it now. Don't know if I've ever thrown a fireball. I guess I probably have and didn't know it. I have no EMS, so I'm not surprised.
A friend told me that it wasn't good for the turbo, that it was kind of like comp. surge but on the exhaust side and it tries to spin the turbine backwards. I don't know if there's any truth to that. My guess is that it happens at/after the cat. Any experts out there know if this is doing any damage?
*edit* Post 700. w00t.
A friend told me that it wasn't good for the turbo, that it was kind of like comp. surge but on the exhaust side and it tries to spin the turbine backwards. I don't know if there's any truth to that. My guess is that it happens at/after the cat. Any experts out there know if this is doing any damage?
*edit* Post 700. w00t.
PaulMSP1939
Member
- :
- 2003.5 Mazdaspeed Protege
Mine backfires all the time on the 2-3 shift. I notice it more often now that the temperature has warmed up here. Driving behind my own car last weekend (mazdaspeed989 was driving it) I saw a bright flash in the tailpipe followed by a crisp *pop*. It was beautiful.
txmzdspd2gen
Member
- :
- 1997 MAZDASPEED PROTEGE AND 03.5 MAZDASPEED
Yeah mine backfires too cos no cats. Kinda weird cos a sedan backfires like a race car.lol
spacemonkey
Member
- :
- Mazdaslow
protection...it runs rich to protect the engine because of detonation.
The higher your risk of detonation the more gas you need to prevent it. Unless you have Direct injection
Air is mixed with fuel and is compress. When you compress air it heats up. And heated air with fuel is bad....it can go off at the wrong time causing detonation. this will put stress on your rods and pistons causing failure if its bad enough. To prevent this mroe fuel is added. to sort of cool the fuel going into the chamber.
in a direct injection car - fuel is only added at the peak/top of the compression process. And when you compress air it can ignite by itself without fuel. so fuel is injected at the top of the compression phase to prevent detonation and use less gas. This cycle is also called "lean burning." And is a technology used in Diesel cars for awhile. Since detonation is so low in a direct injection car it is able to run higher compression for more power. Hence the new Mazdaspeed 3 and 6 have 9:5:1 compression and the VW GTi has 10:1:1 compression. Direct injection cars can run less fuel and more lean due to its DI system.
OUr Mazdaspeed proteges have good ole fashion port injection where fuel and air is mixed at the bottom of the compression phase. along with higher compression then your normal port injected fuel car you have a pretty high risk for detonation if you run too lean.
it may also help emissions to save your cats.
The higher your risk of detonation the more gas you need to prevent it. Unless you have Direct injection
Air is mixed with fuel and is compress. When you compress air it heats up. And heated air with fuel is bad....it can go off at the wrong time causing detonation. this will put stress on your rods and pistons causing failure if its bad enough. To prevent this mroe fuel is added. to sort of cool the fuel going into the chamber.
in a direct injection car - fuel is only added at the peak/top of the compression process. And when you compress air it can ignite by itself without fuel. so fuel is injected at the top of the compression phase to prevent detonation and use less gas. This cycle is also called "lean burning." And is a technology used in Diesel cars for awhile. Since detonation is so low in a direct injection car it is able to run higher compression for more power. Hence the new Mazdaspeed 3 and 6 have 9:5:1 compression and the VW GTi has 10:1:1 compression. Direct injection cars can run less fuel and more lean due to its DI system.
OUr Mazdaspeed proteges have good ole fashion port injection where fuel and air is mixed at the bottom of the compression phase. along with higher compression then your normal port injected fuel car you have a pretty high risk for detonation if you run too lean.
it may also help emissions to save your cats.
Last edited:
Mine does it too...sometimes really loud.
I have 2.5in catless, no resonator, with stock racingbeat muffler (actually sounds good and some nice hp gains).
Not sure whether or not i shoot flames, but i definitely get backfiring every so often. The thing that shocked me most was that the CEL never came on at all, and the car seems to be running fine.
::shrug::
I have 2.5in catless, no resonator, with stock racingbeat muffler (actually sounds good and some nice hp gains).
Not sure whether or not i shoot flames, but i definitely get backfiring every so often. The thing that shocked me most was that the CEL never came on at all, and the car seems to be running fine.
::shrug::
http://s36.photobucket.com/albums/e45/dsmspeed/?action=view¤t=jomodriveby.flv
Check out this backfire. My car doing a 1st-3rd, just as I shift into second you hear me backfire. Sounds like a tennis serve.
Check out this backfire. My car doing a 1st-3rd, just as I shift into second you hear me backfire. Sounds like a tennis serve.
JOMO said:http://s36.photobucket.com/albums/e45/dsmspeed/?action=view¤t=jomodriveby.flv
Check out this backfire. My car doing a 1st-3rd, just as I shift into second you hear me backfire. Sounds like a tennis serve.
lol. That really did sound like a tennis serve. haha.
haha, mine sounds like that but a little deeper...nvmsp said:lol. That really did sound like a tennis serve. haha.
livelyjay said:I backfire occasionally, and only under one condition. Coasting to a light or turn out of gear, then put it into gear and let out the clutch. Sometimes I get some nice pops, but most of the time you can barely hear it.
Mine does the samething but i have a 2000 protege 1.8L ... lol I have the mazdaspeed axelback . I can hear it poping in the exhaust .
hell mine does it and im completely stock with the round 03 muffler on my 3.5....i get the loud pops between 2nd and 3rd, and a bunch of small ones when decelerating through the gears. ive been told it's just unburnt heated gas leaving the exhaust...nothing bad, just verification that we are rich as hell! ...in some way or antoher
Running rich protects the engine against damage at the cost of your spark plugs and gas milage, which are both cheaper than a new motor.
__________________
ya mazda never heard of a "knock sensor" apparently and uses preschooler methods to obtain safety...or lack of safety depending on how you look it it.
haha on the way home tonight i was driving in town cuz workers are working on the highway cuz its all ****** up in one area... i come up to a stop sign and see two ppl walking, i said well lets hope it backfires to see if they get scared... so i held the throttle at 4k rpms during first gear and i shifted to second and WABAM! s*** was the loudest backfire to date lol... s***, there necks ****** snapped cuz they thought it was a shotgun lol... o man, i love doing that s***...
- :
- 2003.5 Mazda Protege' MazdaSpeed
Rawyzf said:Vibrant has 1 high flow cat.
i backfire too with magnaflow and MAM catted midpipe.
On the side note, how do backfires creates??
New Posts and Comments
- Replies
- 145
- Views
- 9K
- Replies
- 4K
- Views
- 934K
- Replies
- 60
- Views
- 13K
- Replies
- 7
- Views
- 463
- Replies
- 7
- Views
- 2K