JMac Performance offers the following services:

Engine Dyno Tuning

JMac Performance uses the DTS Powermark engine dynamometer capable of holding 2000 Horsepower and 1500 Ft-Lb of Torque


  • Horsepower
  • Torque
  • Fuel Pressure
  • BSFC (Brake Specific Fuel Consumption)
  • Engine Vacuum
  • Oil Pressure
  • Oil Temperature
  • Water Temperature
  • EGT (Exhaust Gas Temperature for each cylinder)
  • A/F (Air Fuel ratio for both engine banks)


$500.00 for an 8 hour dyno session


(Click the tags below to view video of our engine dyno pulls)

624 Horsepower street pump gas 468

1002 Horsepower 548 Big Block Chevy on the dyno

456 Horsepower 351 Cleveland

JMac’s Budget 350 on the dyno


Custom Engine Building


JMac Performance can custom build an engine to meet your performance expectations, call for a quote.


Contact John at (949) 291-6408


Rancho Santa Margartia, Ca 92688