Join Date: Jun 2011
Location: Avalon Beach, Australia
Had my car dyno'd this week following the 123 install.
I had the car initially setup on Curve #1, which to me seemed to work ok - albeit some throttle hesitation when accelerating from low revs. After much experimentation, the optimum curve for both low & high range revs was Curve #0 (1300-1600 motors), using max advance of 33 degrees at 5000 rpm. This gave a ruler straight 45 degree power line from idle to 4500 rpm. Instructions to the tuner were for usable torque, not max HP.
The mixture was initially very lean, which I believe was the result of changing the K&N pancake filters for a large single Pipercross unit. After replacement of the main jets, air correctors and idle jets, the AF/R was an ideal 12.5 to 13.4 through the entire rev range.
The car gained around 19 HP compared to last dyno and now drives beautifully.
The dyno tune is pricey, but I believe worth every cent.
"horsepower sells cars - torque wins races".
1969 MK1 1750 GTV