I've heard ltos of conflicting info about how to size injectors ona 7.

1. If primaries too big, idle AFRs will be high.
2. higher the secondaries compared to first, harder to smoothly make the car stage.

Solution : Same injectors top and bottom.

Now why I was told this is that I was having mileage isues driving around town. Turns out I have 550 pri and 1000 secondary. I have a stock turbo that boost too ofter so tuis hard to keep the car in vaccum. When the car goes into gboost, AFRs dip quite a bit to keep the car from feel the staging turn on.

I had that leaned out so that it wasn't as bad, but the staging is very noticeable now.

Has anyone had any problems tuning with 4x1000s or 4x1200? (apparently, easier to stage them and makes it better for dailying when you dip into 0 boost)

Or would it be wiser to have 720 primaries and 1200/1000 secondaries?

 

What you're controlling these injectors with will have a big impact on whether or not you can use injectors of different sizes.

 

It is the same as just about every other production car. If you don't know what you are doing then you should really take your car to a professional. The ECU is not something that a novice should play around with. Think of it as brain surgery for your car.

 

it depends on your engine management more than anything else

 

Sorry, sho9uld have said I'm using microtech ATM, lt10s.