The other thing to look out for is the spray pattern. I'm not familiar with either of these injectors & don't know their details.
In my own experience, if you're using the standard inlet manifold and have an injector with a wider spray pattern you're going to get port soak. This will lead to a lumpy, uneven idle - which you can live with, but also a MOT failure for emmissions which you can't.
There are plenty of larger flowing injectors on the market that will fit our injection systems. Most of the more modern ones, with multi hole pintles, although a lot bigger will idle happily. It's just a question of finding one with a narrow spray pattern.
Get ones big enough & you won't need to change them when that 300bhp just isn't enough anymore!
Tim
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