Ok, before I get started, let's keep this civilized and on the up and up. My true or false deals with the age old question of doing exhaust and intake with or without efi programmer. Here goes.
We know that the efi system on the Raptor is supposed to adjust for altitude, this is true right? If that is the case, it is adjusting for air/oxygen density. In other words, it makes on the fly adjustments for the fuel air mixture. Ah ha, wait a minute, how can it do that if it's not a closed loop system? But somehow it does. So if that is the case, what is the difference between elevation adjustments by the efi and putting on a pipe and intake? The latter puts more air into the motor, ie more oxygen. So wouldn't the efi system pick up on that?
According to this article, http://www.quadmagazine.com/quad/tests/article/0,24942,1160468,00.html they say you can make the mods without programmer but to get the utmost, tweaking with one is a good idea. I hope you don't diss Quad magazine cause many of you are still gloating about the 450/Raptor shootout. I know how much you guys hated the pipe shootout on the Rappy. Ok, add to magazine claim is the fact that Yamaha sells their full exhaust and intake, but no programmer? Why on earth would they do that AND say your warranty is not void if you use their GYTR parts? They even go as far as posting dyno results with the mods. Has anyone talked to their dealer about this, or YOA for that matter?
Now I ask again for you to be kind and not give me the "it's your bike, do what you want, etc". I am not saying I believe one way or the other. I'm just throwing this out for discussion. The main reason is lately I've seen quite a few posts where guys doing the mods with the programmer are having problems. I'm sure there are many who are not having problems. But if you can do the two mods and maintain the full on reliability, that would be ideal, wouldn't it?
So, what do you think? I know many say that it will run too lean etc, but has anyone actually blown a motor or caused irreversible damage? What factual proof are people basing their claim of needing an efi programmer on?
so, programmer needed, true or false?
MK
We know that the efi system on the Raptor is supposed to adjust for altitude, this is true right? If that is the case, it is adjusting for air/oxygen density. In other words, it makes on the fly adjustments for the fuel air mixture. Ah ha, wait a minute, how can it do that if it's not a closed loop system? But somehow it does. So if that is the case, what is the difference between elevation adjustments by the efi and putting on a pipe and intake? The latter puts more air into the motor, ie more oxygen. So wouldn't the efi system pick up on that?
According to this article, http://www.quadmagazine.com/quad/tests/article/0,24942,1160468,00.html they say you can make the mods without programmer but to get the utmost, tweaking with one is a good idea. I hope you don't diss Quad magazine cause many of you are still gloating about the 450/Raptor shootout. I know how much you guys hated the pipe shootout on the Rappy. Ok, add to magazine claim is the fact that Yamaha sells their full exhaust and intake, but no programmer? Why on earth would they do that AND say your warranty is not void if you use their GYTR parts? They even go as far as posting dyno results with the mods. Has anyone talked to their dealer about this, or YOA for that matter?
Now I ask again for you to be kind and not give me the "it's your bike, do what you want, etc". I am not saying I believe one way or the other. I'm just throwing this out for discussion. The main reason is lately I've seen quite a few posts where guys doing the mods with the programmer are having problems. I'm sure there are many who are not having problems. But if you can do the two mods and maintain the full on reliability, that would be ideal, wouldn't it?
So, what do you think? I know many say that it will run too lean etc, but has anyone actually blown a motor or caused irreversible damage? What factual proof are people basing their claim of needing an efi programmer on?
so, programmer needed, true or false?
MK