Trying to dyno tune a 300c. Baselined 338hp on a diablosport tune, going to the stock tune went up to 345hp, My best tune was 348hp. Where is the power at? Ive tried leaner, more timing, moving the exhaust cam both ways, everything looses power vs what i have.
you are not logging knock voltage or knock retard - very important to do so with a mopar hemi on pump gas
the reason it made less power on "tune 1" is that dip in timing at high rpm
looks like the pcm saw voltage there and pulled the timing back 4 or 5 degrees
see the dip?
compare that to the stock log... looks like it saw some voltage around 4600 in that one, pulled a couple deg there, then ramped them back in and the timing held til you lifted
on the stock log the t stat was not open yet (its a 203?) and ECT was 190 at the hit... compared to the tune 1's higher temp
Good catch on the fans. On my end it was showing around 32F for hysteresis. Aside from the enable temps being butchered the hysteresis was a hpt glitch.
This wasnt my first hemi maybe just the first time for this os. Still learning on these but not much info is out there compared to chevy. This was my first dyno tune on a hemi.
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