Originally Posted by
Chr1s
Joey, do you know how to create a datalog, this is done by connecting to the S300 and recording as you drive around? We can tell straight away if it's the tune that's causing your car to run like shit (probably is) but it may be something else causing the bad fuel economy, such as a bad temp sensor etc.
I disagree on a tuner having to completely "retune" the map for a customer that simply wants a touch up. If both tuners have half a brain, they will ramp the car in the load conditions to see how bad it is, if it's fine at high load, rpm, why change it? You're just wasting your own time and customers money. Most tuners will tune high/medium high load and leave the rest, I've spent over 2 days tuning my partial throttle map on the street to be spot on and the car drives like a champ now, I seriously don't expect this from an average "tune" that I would pay someone.. I expect it to be in the ballpark though.
Typical dyno tuning is not something you can do in 2-3 hours, OEM guys take months and months, spend millions tuning it, cold start, hot start, tip in, throttle enrichments, compensations, emissions testing, heat generation, etc. It is impossible for someone to do this on the dyno in a few hours (especially the "his a shit tuner he didn't tune my cold start but he never had the chance to start it in the cold" LOL) - BUT... you can tune it to be decent on the dyno for partial throttle and should be good enough..
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