I was on RC site and was trying to preform the calculations for injectors and I came to find that this is to run all the same size injectors. Of couse we run two of one size and two of the another size. How would I go about findin the two differant injector sizes need for a stated hourse power on our cars?

 

you don't have to run two different sizes, some run different sizes to have better driveability(normally the primaries are smaller). what you have to do is find out how much power you want to make then make the decision on what size injectors you need for that hp range.

 

Check out my FS thread when you figure out how much power you want. This came off my car around 3 or 4 weeks ago, good enough to support 400whp reliably. And also saves you the cost of having to purchase aftermarket fuel rails and you don't have to change any wiring either.

FS injector link

 

you didn't mention what kind of car you have. FD's have less options because the stock fuel rails are side feed.

 

I have a FD and I will be using CJ motrs fuel rail kit. This will allw me to run top feed Bosch style injectors.

With my current set up I am looking to run 400 + wrhp. When I change the turbo to a 500R from A-speec I will be looking to hit closer to 500.