Injectors

[lexus boy]

who on here has uprated injectors?

and know where i can them from?

[waddy]

Have a chat with Zee

[lexus boy]

i think ive sorted it, think i need the 340's that are available from toymota

[SpOcK]

i think ive sorted it, think i need the 340's that are available from toymota

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What are you going to use to control the fuelling (e.g. "ecu-wise")? If you just change to bigger injectors and do not alter the fuelling maps, your going to end up with sh*te idling, because the injectors will be "open" for the same amount of time but due to larger capasity they inject much more fuel. That leads to the mixture being waaaay too rich when idling.

[lexus boy]

no will be changing lots of other bits and pieces too

havent yet decided on ecu

[RoadRash]

i think ive sorted it, think i need the 340's that are available from toymota

←

What are you going to use to control the fuelling (e.g. "ecu-wise")? If you just change to bigger injectors and do not alter the fuelling maps, your going to end up with sh*te idling, because the injectors will be "open" for the same amount of time but due to larger capasity they inject much more fuel. That leads to the mixture being waaaay too rich when idling.

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..... yes and the ECU will check the rich mixture over the O2 sensors and will reduce injector opening time to get L1 again. ;)

[SpOcK]

i think ive sorted it, think i need the 340's that are available from toymota

←

What are you going to use to control the fuelling (e.g. "ecu-wise")? If you just change to bigger injectors and do not alter the fuelling maps, your going to end up with sh*te idling, because the injectors will be "open" for the same amount of time but due to larger capasity they inject much more fuel. That leads to the mixture being waaaay too rich when idling.

←

..... yes and the ECU will check the rich mixture over the O2 sensors and will reduce injector opening time to get L1 again. ;)

←

...yes, but while cranking, the ECU doesn't read lambda sensors, but pre-set maps instead. It can read lambda sensors only after they've heated up, which takes some 30-120 seconds.

So, while cranking, the ECU keeps the injectors open according to pre-set fuel map. This leading to a situation where std opening duration is too long for bigger injetors, resulting flooded engine. And because of that, chances are that the engine won't start at all...

[RoadRash]

Mine is running on higher fuel pressure and it doesn't run richer because of this. ;)

Of course... after an ECU reset it would run richer, but it will learn to set the correct Lambda and after some miles of driving it's fine. :)