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Buying Hptuners Vcm Suite


rollex

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  • Member For: 10y 5m 1d
  • Gender: Male
  • Location: Australia

Just some history my car has been tuned many times so this may be the issue

when I had bought it they had tuned it with HPT to increase boost.

Heinrich tuned it with HPT again

KPM then started from scratch with XCAL, I think they reflashed my ecu back to stock but they may have only reflashed the maps to stock and still had the PCM not "stock" if you know what I mean.

Time will tell when HPT get back to me.

Regarding tunign from scratch, would it be possible to start a new tune, spend a few hours getting there then revert to my XCAL to drive to work etc. Then the following weekend go back to my new tune and keep chipping away at it? This would be quite appealing as I could learn to tune but still revert to my current XCAL tune if it became too hard or I had issues.

Thoughts?

"return to stock" with XCAL

Start tuning with HPT

Save HPT File

Load "return to stock" hpt file

Re-marry XCAL and load my tuned XCAL tune

drive current xcal tune to work during the week

following weekend return to stock again, load my partially tuned HPT file etc

rinse and repeat until my tune is driveable ?

Edited by rollex
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  • Moar Powar Babeh
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  • Member For: 19y 1m 17d
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  • Location: Perth

Re step by step approach. Yes.

You need to consider what you need to know about your current tune, without being able to view it. Think Injector values,Spark and Spark source,Fuel and Fuel source, Cam angle etc etc at the various engine load points. Then you can use these values as starting point for your tune.

Then familiarise yourself with livelink.

IMHO not seeing your current tune will be an advantage down the track as it will force you to learn.

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  • Member For: 10y 5m 1d
  • Gender: Male
  • Location: Australia

How much of that info can I find out via the scanner if HPT come back to me and say they can't decode my tune?

Another question is is how good is the standard knock detection, will I be safe to tune the car without knock ears. Eg if I trend the knock values with the scanner will this be sufficient to see knock and also safe if I leave the standard knock retard enabled? Knock ears would be ultimate but unless I make some backyard ones they are pretty expensive.

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  • Member For: 10y 5m 1d
  • Gender: Male
  • Location: Australia

Hpt said the osid has been scrambled most likely in an attempt to tuner lock the pcm so they won't be supporting it. Ill see if kpm are interested in unlocking it for me otherwise I guess this will be a good learning experience.

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  • Member For: 10y 5m 1d
  • Gender: Male
  • Location: Australia

Have you used the xcal 4 software? Just out of curiosity much better is it, can you rescale maps eg increase the resolution and change axis limits etc?

This is why it would be nice to use the sct tune as they might have done this.

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