What do you think of this? (Virtual Dyno)

[Methodical4u]

I looked around and found this link that compares the VD to an actual dynojet... thoughts?

Our Experiments With Virtual Dyno « Innovative Tuning

[Methodical4u]

I ask because it's giving me 348/346 and there's just no way that's right

[EJ257]

It's as good as the information you put in. I've found it to be pretty accurate in terms of #s. While the shape of the curves will not necessarily reflect what you'd see on a real dyno, it is useful for seeing if changes to boost/timing/AFR are worth doing.

[Methodical4u]

Here it is

[Methodical4u]

what do I need to change?

[EJ257]

I haven't played with the new versions (as you can see, my graph is from 1.1.4). I'm not sure, to be honest.

Is the road totally flat?

[Methodical4u]

maybe this one just reads high. The car was light on fuel... that might have some to do with it, but not that much. I'm just trying to figure out what i'm missing. Of course being 25 degrees that probably helps a lot.

[Methodical4u]

off the topic a little, but while I was doing the run, I could hear the BPV fluttering... does that mean it's leaking? This is a stage 3 map and is supposed to hit 20 psi... but I don't know if it just needs to be tweaked.

[Methodical4u]

Eric from TP says it looks like there might be a boost leak based on load and maf readings... maybe that's why the power doesn't add up.

[bbarnhill]

Id like to see this log on a lower smoothing as Im betting something is being masked by a smoothing of 6. Ill wager ... the Mtn Dew on my desk right now that there is a spike in the red graph. Probably a little above 5k rpm.

[Methodical4u]

Id like to see this log on a lower smoothing as Im betting something is being masked by a smoothing of 6. Ill wager ... the Mtn Dew on my desk right now that there is a spike in the red graph. Probably a little above 5k rpm.

This was after the boost was smoothed out a bit... the area where the boost fluctuates is right where the BPV or whatever is making the fluttering noise.