First Scan - anybody fancy a gander ?!

[simonbuk]

Not too sure of all the key parameters to watch out for currently but working at learning stuff.....

One thing that looks odd (and I don't know how it works it out ?) is the 'power' - it never seems to go over 100bhp but does show it going down to -50 ?!

So I guess the power band might actually be up to 150 bhp but plotting on the graph might be wrong ?

Can't give an example right now as I'm on my phone.......

[chrism]

Yep, agree with RonR - the O2 sensor plot gives relief.

I'd be suspicious of power data tho'. I don't know how EScan could measure it other than by a boost/%throttle comparison with an 'expected' max bhp? There is correlation there if you overlay data...

I hadn't been much interested in the past about bhp so I looked up my original 1499 conversion scan trip and got a similarly meaningless graph:-



RonR recently found discrepancy (with axes and a sensor voltage conversion factor, I think) in the original and I think you've probably found another. The axes seem meaningless - perhaps the shape is the only credible offering of bhp.

The cynic in me reckons it's a (say) '50% throttle of 160bhp = 80bhp'' or '0.3 out of 0.6 boost = 80bhp' kind of estimate without the sophistication of correct axes...no further accuracy than this...

It'd be interesting to see if anyone's made sense of it to date or given it any relevance?

ps using your axes theory, when you gave it 'beans' you'd have had ~200bhp...nah not partictularly impressed or convinced with this bit of the EScan software, I'm afraid...

[simonbuk]

Cheers for looking - I think it might be nonsense so not concerned enough to do anything at the moment.

Thanks for the loan of the O2 sensor and removal tool - I'll drop it off shortly.

Just dropped my car at a friend's garage to check base timing and emissions , and my alternator may have died on the way there

[Tuga2112]

ps using your axes theory, when you gave it 'beans' you'd have had ~200bhp...nah not partictularly impressed or convinced with this bit of the EScan software, I'm afraid...

my understading is that with an everest chip, bigger bore exhaust and a healthy running car you can get there, or at least pretty close.

but i share your opinion, it must be just a guess caluclation.

[dapinky]

I'm no expert, and don't know the algorithm, but it has long been said that the power is a 'calculated' value not a 'read' value.......

[RonR]

Looking at the Elanscan 'ini' file, the power figure isn't amongst the ALDL data sent from the ECU, it's an internal Elanscan calculation.

I imagine it's calculated with some or all of: Rate of change of velocity (acceleration), Diff Ratio, Gear used, Gear ratio, RPM, Tyre radius, Weight of car, Transmission losses, etc...