Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; plgSystemNiceUserInfoLite has a deprecated constructor in /home/ddsystem/public_html/perfectpower.com/plugins/system/niceuserinfolite/niceuserinfolite.php on line 28
SMT-FTX Technical Manual - Keywords

SMT-FTX TECHNICAL MANUAL

Perfect Power Online Manuals.

 

Support for your SMT-FTX Unit.

KEYWORDS

AUXILIARY INJECTION

This is a separate injector drive, which is activated via the Set-point procedure. The extra injector can be used to supplement the fuel.

 

BOOST DRIVE

The unit has the option to construct a boost regulating loop for turbo applications.

 

ECU, OEM ECU

The computer “box”, which is controlling the engine’s operation

 

MAPPING

A process by which, a signal is manipulated via the various tuning maps.

 

INTERCEPTING

A wire is cut, and the two ends are “routed” through the SMT-FTX for the purpose of changing the signal.

 

TEE IN

A wire from the SMT-FTX is joined to the standard wiring loom. The signal is only read, and no modifications take place.

 

LAMBDA, OXYGEN, AFR

A lambda probe, oxygen probe, or AFR sensor all measure the oxygen content in the exhaust pipe. At lambda 1.00 the AFR=14.7 and a narrow band sensor generates a voltage between 0.2 and 0.8 Volts.

 

CHIPPING

Traditionally this applies to changing the “chip” of the ECU to provide better performance. When ECU’s started to control the engine it meant changing an EEPROM. The term now also applies to adding a SMT-FTX to the car, without changing any chips or EEPROMS. The SMT-FTX has the advantage over chipping because of the online tune and the re-tune capability.

 

MAF

Mass Air Flow sensor. It could be a device with a “FLAP” or a solid-state “hot wire” sensor. It generates basically an analog output voltage, which increases with higher airflow. Some devices compensate for air temperature (density).

 

MAP

Manifold Absolute Pressure. It is a solid-state device with 3 wires and provides an analog output voltage, which increases as the manifold pressure increases. Since it measures the absolute pressure the output voltage DECREASES at idle. We don’t like this term because is also applies to a tuning map.

 

AMP

Absolute Manifold Pressure (AMP). The same thing as a MAP! We like the term AMP because it can’t be confused with a tuning “map”.

 

MAP SWITCHING

All of our units have two tuning maps, which can be switched while driving. There are THREE possible map-switching scenarios.

 

OEM

Original Equipment Manufacturer.

 

PWM

Pulse Width Modulation. The information is in the ON to OFF signal ratio.

 

WIDE BAND LAMBDA

This is a 5 wire lambda probe (BOSCH LSU-4) with the part number starting with 025800. The SMT-FTX can modify it. This probe is very popular because it measures the AFR very fast and at very RICH mixtures, which is useful for turbo/supercharger applications.

 

PICKUP

It is a sensor, which “picks up” an engine measurement like temperature or crank angle position. The sensor can be a Hall Effect (square wave) or magnetic (sine wave).

 

FEED-THRU

A method where a wire is cut and routed through the SMT-FTX for the purpose of modifying the electrical signal.

 

BALANCED INPUT

Refers to a magnetic pickup (CRANK) where the pickup coil is isolated from ground. If a balanced input is tested with a scope, then both wires have an opposing signal on it. If this type of sensor is used then one side must be grounded.

 

MAP SWITCH INPUT

A switch input when not used defaults to MAP=A.

 

SET POINT RELAY DRIVES

An “open collector” output, which can drive a relay of 1A at 12 volts. The unit switches to ground, so the other coil wire of the relay must be connected to + 12v battery or switched +12v. The output state can be configured via the tuning software to switch on various set points. It can also be set to depend on the polarity and in the case of linked set point functions an AND\OR logic state.

 

INJECTOR DRIVE

The SMT-FTX switches to ground. The current rating is sufficient for ONE 13 ohm injector per output.

 

DEFLECTION OR THROTTLE INPUT

It is a tee-in signal in the range from 0 –5Volts. Normally a low voltage refers to a closed throttle.