Haltech E6X Manual Win Version - Manual (Page 130)

E6X Manual
130
D.3 Injector Staging
Another way of increasing injector flow, without compromising good drivability and fuel
economy is to employ staged injection. Injector staging allows the use of primary and
secondary injectors and is usually only used on high boost turbo or supercharged engines. The
ECU will fire only the primary set of injectors until a preset load point, (called “Staging Bar”
found in the Fuel setup page) where the ECU will control both primary and secondary
injectors together.
Staging is enabled on the Fuel Set-up by selecting the "Staged" Injection Mode. The Staging
Bar is also defined on the Set-up (Refer to 4.2.2 Fuel Set-up Page, p38).
Fuel Setup page showing Staged Injection Setup
The turn on point for the secondary injectors depends on injector size and engine
performance, but will usually occur just after the pressure in the intake manifold of the engine
has reached atmospheric pressure. The staging point must occur before the primary injectors
have reached 100% duty cycle. Go to the highest speed range in the fuel map that the engine
is using, and make sure that the last bar for primary injection is not too high. If it is, you must
stage at a lower pressure.
Adjust the bars around the staging point with extreme care to ensure that the engine does not
lean out as the secondary injectors come in. When the Haltech ECU begins to stage it begins
Staged
Injector
Setting
Staging Bar
Setting