Where ever the fuel reg gets it reference is what I use to T into for map reference been a very long time so where it goes to plenum/runners I have no idea but never had issues.
What ecu?
Same shop every time?
Same ambient temperature?
If timing is correct then pull plugs and see if lean or rich.
Dyno can also read different if they have changed ramp rate or not set tacho/speed properly
Traction wasn't bad, l couldn't give it everything off the line but was able to go WOT about half a second after rolling - good for NZ drag strips. Like one run I did a 1.96 60ft and pretty sure I was on for a 12.4 but lifted early as I was on a 12.5 dial in, and still won haha
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