Vishnu is using a modified version of their Procede to tune the X. This is with stock exhaust!
Shiv says this is equivelant to a tuned IX with TBE on that dyno. Impressive!
Quote:
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Originally Posted by shiv@vishnu
Observations:
-The X runs grossly rich under boost. So rich, in fact, that the engine bogs briefly between shifts at WOT. Really annoying.
-Power output is very sensitive to fueling as soon a AFR leans out from the 10-10.5:1 AFR range it usually runs in at full load. And it stays reasonably sensitive to enleanment even into the 12-12.5:1 AFR range. Something that wasn't the case with the 4G63.
-Engine still makes power in the presence of detonation events (which is not good of course). The 4G63 would behave differently by immediately yanking back several degrees of timing and 20-30lbft of torque. Not sure why the ECU in the X isn't as reactive to knock a the older ECUs. One interesting thing I noticed is that the tachometer movement becomes "sticky" when accelerating during audible knock activity. Haven't seen that before.
-Engine tends to detonation at fuel cut. We had to enrich and retard the last 300rpm prior to fuel cut to prevent this from happening.
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http://forums.evolutionm.net/showthread.php?t=322616