:scared looks pretty sick

 

LOL While it looks great, unfortunately it's normally an indication of the air/fuel ratio not being setup right. Not everytime, but most times.

I have a full Akra on mine, custom mapped with a PCIII and it doesn't spit flames.

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my guess is AIS putting clean air in with a little rich tune? i dont know though

 

Yep, another reason. What with the introduction of AIS-type systems on bikes we're seeing flaming a lot more often now than we used to.

 

could always plug that up. get rid of the ais.

 

It'd help for sure but signs of an incorrect a/f should never be overlooked. If it's a full system especially :fact

I'm not one for recommending anyone to run a slip-on can without at least getting a quick a/f check done personally. I know it's not normally harmful but you only have to be the one 'un-normal' case.

 

Are these flames causing any harm to the bike at all?

 

short term, the answer can really vary depending on how you ride it prior to getting your PCIII tuned correctly. if you ride it gently before installing there is not much damage occurring. long term i wouldn't want to ride it if it wasn't tuned properly. running rich (is that right?) and spitting out flames is not a real good sign of tuning.

 

While we are on topic, if I was to do a Akrapovic slip on system with the optional Y pipe, would I absolutely NEED to buy and install a PCIII right away or could it wait. I know I wont get the best performance without it, but what I am saying is will the bike run okay? Or am I gonna be stalling and stuttering all the way through the RPMs?

 

My bike runs 10x better than stock with the Akra and GYTRs, to be on the safe side, unplug the O2 bolt in the midpipe that is supplied and run your stock 02 sensor for now(you will unplug this from the stock catalytic midpipe), the Akra midpipe has a bolt in there that you need to keep, because when you get your PC, you will ditch the 02 sensor and put that supplied bolt back in.....

first thing you will notice with the Y pipe, this bike actually has a nice midrange!!!!!!felt like it was muffled or restricted before.....It revs up a lot quicker now, and no studdering....clears it's throat a little quicker out of the hole, and I have no PC at the moment.....

I don't believe I am shooting flames, but as long as its not constant, it won't damage your engine, it is from all the pollution crap they put in these bikes, so is the popping...

If you change the headers or air filter, then you will definitely need a PC.....

I'm sorry i didn't order it sooner....

 

you should do a pc3 with the akra and y pipe. It shoots fire because it's the meanest setup on the market

 

you should do a pc3 with the akra and y pipe. It shoots fire because it's the meanest setup on the market

:sneaky

 

it's a liiiiivvvveeee...... looks pretty sick

 

The full Akra on my R6 will shoot a flame occaisionally on de-acceleration.

 

Running rich will not hurt your bike. Excessively lean will. As far as NEEDING a power commander with exhaust changes, you will get different answers from different people.

One of my friends has a 2007 r1, with gutted cats, and a and r baffles...no power commander. It runs great, pulls really hard, and isnt lacking for power anywhere in the rev range. Havent seen if his shoots flames or not.

Another buddy has an 07 gsxr 1000 with taylormade exhaust (which is cool as hell by the way), which gets rid of the cat...no power commander either. Bike runs great, spits huge fireballs on decel.

I've asked alot of folks from different companies why any of these bikes need a power commander when they have an oxygen sensor in the exhaust that is used to keep a specified air to fuel ratio. I have never gotten an answer that made sense.

I say run it and dont worry about it.

 

I've asked alot of folks from different companies why any of these bikes need a power commander when they have an oxygen sensor in the exhaust that is used to keep a specified air to fuel ratio. I have never gotten an answer that made sense.

thats what i thinking...what the hell we need a pc3 again, if our bike is a closed loop bike...the bike should tune itself to a perfect a/f ratio..?? :dundun:

 

how much gas you going through LOL

bad a/f ratio and it is not going to help your plugs

 

The cause of spitting flames can either be a rich or lean a/f ratio. Lots of people just assume it's rich if it's spitting flames but unfortunately that doesn't have to be the case. That's why I'd recommend getting any bike checked.

 

cool you just cleared that up for me. i was a little unsure if it was flaming because of running rich.

 

kinda cool looking. I wanna do it just to look cool

 

So you would just run your bike rich just to look cool? :whtfu:

The first video looks like a full race bike so i'm assuming that they're running it a bit rich for the track and could care less about plugs to a point, considering they're replaced after every race, as for the other two vids, IMHO, i'm going to say they haven't been mapped since the install. I would say though as long as your not running lean your not going to harm the bike although if your running over-rich you'll be going through plugs almost every 500 miles. Although i'll say i agree with the majority of the post's above me

 

wich a rich setup the bike reacts smoother when you start opening the throttle.
For that reason many racers put big numbers in the 0 degree throttle position line in their pcIII map. This is the reason why many race bikes throw flames on deceleration.
I wouldn?t do that on a street bike because of poor fuel economy and because of the risk for fouled plugs.

 

Good info :thumbup

 

Look, I did some searching last night for dyno charts before and after adding a power commander. Its easy to find before and after numbers for horsepower and torque, but very difficult to find before and after numbers for a/f ratio.

When I did find some, EVERY SINGLE graph showed that the bike was rich before adding the power commander. The PcIII was just used to take fuel out. Most in the range of about 12.5 to 1, adjusted to around 13.0 to 1.

In all cases, the bikes were in an area that was not excessively rich or lean to the point of causing damage. Sure the fueling was not optimized to make power, but was no where near dangerous.

I also dont buy into the whole "flames can be from a lean mixture argument". It just doesnt hold water. If there is not enough fuel in the mixture to be ignited when sqeezed with a 12.5 to 1 compression ratio, a spark plug, and a hot combustion chamber, then its sure not going to ignite outside the bike.

And if its from a lean misfire, as someone else has stated, well believe me, you're gonna feel if one of these bikes is dropping a cylinder at 13000 rpm.

Im gonna have to agree with Supertwin, its most likely from fuel being added at a closed throttle position. You just see the flames after installing an exhaust because you have no cat or crazy baffles in your cans to suppress it.

If anyone has or can find a dyno chart of a bike with just an exhaust (full system, or cat eliminating slip on), before and after adding a power commander and tuning, please post it. As long as it has before and after a/f readings.

 

just raw fuel, the flames and popping are small , wait till you get it on the track and your constantly going from WOT to closed throttle loading the cyclinders with unburned fuel, mine shoots 1+ foot flames out of both sides, ii think its awesome but im goober.
its not hurting anything

 

Cool.. :rock...
Keeps the tailgaters off ur ass :flame::thumbup

 

F yeah. :rock You know that dude in the Beamer or Mercedes that just creeps up in rush hour, to where it pisses you off and you want to kick in his grill. Maybe a little flames will do the trick.

And you thought the other vids were bad...http://youtube.com/watch?v=jDt_uKhaWEQ

Good thing that bikes set up with race plastics. If a girl was on the back of that she'd need a flame retardent a**.

 

And you thought the other vids were bad...http://youtube.com/watch?v=jDt_uKhaWEQ

 

err what's the difference with the flames in this....

http://youtube.com/watch?v=YuQwjSNIzI0

and running rich?

 

That is rich. Lean wont make flames. Lean = not enough fuel to burn. Until I see a bike on a dyno, showing a lean mixture through a lambda meter, AND spitting fire, I dont believe it.

And by lean, I mean over 14 to 1.

 

yeah i know what lean is..

so what your saying is, when running rich, flames will only be produced when decelerating? (that's wat the car seems to be doing..)

and there is absolutely no problem for the V8 supercar to be running rich?
so the supercar is using it's fuel to make flames instead of combusting the fuel in the engine...

something sounds wrong....

 

Yeah, you only see the flames on decel because there is not enough throttle opening to match the fuel being delivered. NO, there is no problem with any engine running rich, and as a matter of fact, its quite safe.

The car is not using its fuel to make flames, they are just a by-product.


Technically, a mixture could be rich enough to cause damage...however, the engine would not run very long, as the plugs would foul very fast, and you would have such a bog on accelleration that you would know you had a problem long before any damage occured.

 

A richer mix will give you a smoother throttle response when you get back on the gas after decelerating. if it's too lean you'll find your ass on the side of the road.

 

Exarctly!