Originally Posted by VT733
I have a pc5 with autotune and plan on running a map off dynojet's website and using the autotune to customize it.
08 600rr track bike with Oem air filter, akrapovic slip on, and modified oem headers. The headers are ceramic coated with the cat and servo removed and an O2 bung welded in.
Can anyone recommend which map to start with along with reasoning and/or personal experience?
I thought the akra full or leo full system maps would be good, but they have alot of "data points" that seem pretty lean (like -10% to -25%). Can anyone explain the reason for this?
I currently have the yosh full system map because it is the one with the fewest negative values and i'm paranoid about running too lean and damaging engine parts. However, I can definately tell it is running rich, by smell/smoke/sound. Am I being too paranoid?
Also, can someone give a quick run down of noticeable symptoms and damage that can result from being either too rich or too lean?
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If you have a `Povic with basically a full system, why are you running a Yoshi map? The good people at DynoJet have taken the time to create a map for your setup (or close to it), why not start with that and let the Autotune go from there?
Not all exhausts are created the same, the internals of the mufflers vary depending on what the manufactures have designed in order to create various sounds and performance gains. The amount of packing and the arrangement of the packing can make a difference as well. The inside of a `Povic will be different than a Yoshi. As the exhaust becomes less restrictive the exhaust gasses will be able to flow more freely from the cylinder. The concern that manufactures have is that as they open up the exhaust, the noise increases as well and there are legal limits as to how loud the exhausts are allowed to be.
Also, at what engine speed are you noticing that it's running rich? I looked up the maps for both the Yoshi Full system and the Povic Full system and made a difference map (Yoshi - Povic) so see which map has the higher fuel settings. The green indicates that the Yoshi is putting more fuel into the cylinders than the Povic and the orange is the Povic putting more fuel into the cylinders. So if you're letting it sit idle and notice that it's running rich, you can see that at low engine speeds and no throttle demand that the Yoshi map tends to put more fuel into the cylinders.
One more thing, what are you using to monitor the AFR? Going back to the fact that different exhausts create different effects on the AFR from the variations in restrictions and packing, adding an exhaust (slip-on or full) will change the effect that the preset settings will have on trying to stay near 14.7:1 AFR. Hence, why a PCV or equal is needed to adjust the settings. If you're just going off of your buttdyno, you're doing it wrong IMO. Dyno shops monitor the AFR and adjust the settings so that 14.7:1 is maintained for the majority of the engine speeds and throttle demands. slight deviations from 14.7:1 are acceptable and sometimes needed to ensure that knocking is avoided.
Load the Povic map and let the Autotune work it's magic.