EXTRA INJECTOR TUNING

Perfect Power Articles.

 

Extra injectors are used in a piggyback application when the stock injectors can’t deliver more fuel. Why not replace the stock injectors with bigger ones instead of installing an extra injector?

 

CONSIDER THE FOLLOWING:

Bigger stock injectors require that the COMPLETE engine is remapped. It sounds easy, but requires a little patience. When everything is done the engine light may still come on.

An extra injector is placed into the central part of the manifold. It requires mechanical work (welding) and plumbing the fuel to it and wiring it up.

 An extra injector works only when the power increase requires it. Tuning is very easy!

 

When it comes to time and money it is much the same and depends on your mechanical abilities. If I have a choice, then I take the extra injector. The mechanical work and the plumbing are predictable with no surprises at the end. Having a ‘predictably’ successful installation counts for me. I have spent hours on the dyno to re-map the complete ECU with replaced stock injectors. Then the engine light comes on after 2 hours driving, and the car is back on the dyno.

 

Regardless of turbo or supercharger installations the actual tuning is the same. As soon as the engine starts going lean add extra fuel. During the tuning at high power you need to watch the fuel pressure: the stock fuel pump may not deliver enough fuel and as a result the fuel pressure drops.

 

The manifold pressure (AMP) is a great help. When it increases it signals that the engine needs more fuel. Extra injectors can be tuned with the SMT8, SMT8L and SMT8T.

The fuel tuner SMT8_FT can’t handle an extra injector, but will handle the stock injector’s replacement very well. See: FUEL TUNING

 

 

THE FOLLOWING PERFECT POWER PRODUCTS CAN HANDLE EXTRA INJECTORS:

SMT8 piggy-back unit
SMT8L piggy-back unit
SMT8T piggy-back unit
SMT8-FT Plug and Play Fuel Tuner unit (Discontinued)

 

VISIT THE FOLLOWING LINKS FOR MORE INFORMATION ON EXTRA INJECTORS:

Product Manuals
Application Notes
FAQ’s