Engine calibration - fueling and ignition timing. Under boost, it is crucial that there is no engine-killing detonation occurring within the cylinder. This is done by fine tuning the air/fuel ratio a bit rich to help cool the combustion gas, and by tuning the ignition advance curve to ensure that combustion chamber pressures stay below the level that causes unburned fuel to ignite ahead of the advancing flame front.

turbobygarrett.com

TurboMaster is a company devoted exclusively to the turbocharger's business since its foundation in 1980, i.e. more than 35 years of experience, knowledge and service backing us up, all of them available for your power needs. 
Distributors of the world best brands GARRETT, HOLSET, HITACHI and TIAL.