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A properly tuned SD car will not run like your are explaining. The driveability of my car with a MAF tune was great and when I switched to SD I couldn't believe it could be even better. Sounds tuned related but see if he can fix it if not find a new tuned.
Oh and here's the dyno graph for anyone who couldn't see it.
I would recommend either making an appointment for him to check it out or find another tuner if you're fairly certain it's not a mechanical or electrical issue.
A bunch of questions based on an internet thread questioning his work isn't going to make your car run better, but it will certainly build resentment and eventually he will probably just start avoiding talking to you.
I don't know enough about a SD tune in general much less one that doesn't use o2 sensors to offer much advice.
Tuning for speed density is easy you turn off the MAF and get the VE table dialed in (there is more to it but cliff notes here) and you go thru the same process to tune the MAF. You have to get the VE table dialed in for either tune because they both reference the VE table for fueling. The fact that he cant change a tune from SD to MAF throws up a lot of red flags. If going back to MAF, you just turn it back on and dial that in. The only difference between the two is speed density usually gives you better throttle response.
Last edited by 1 Slow WS6; Mar 13, 2015 at 01:03 PM.
Tuning for speed density is easy you turn off the MAF and get the VE table dialed in (there is more to it but cliff notes here) and you go thru the same process to tune the MAF. You have to get the VE table dialed in for either tune because the they both reference the VE table for fueling. The fact that he cant change a tune from SD to MAF throws up a lot of red flags. If going back to MAF, you just turn it back on and dial that in. The only difference between the two is speed density usually gives you better throttle response.
This surprised me too, which sucks because we're fairly limited here in the Bay Area as far as tuners go.
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