Injector

I'm looking to buy injectors for the 2L naturally aspirated Ford Duratec engine in my Caterham Seven.

I tried the Injector Dynamics calculator.

The calculator they provide only shows values ​​above 5000 rpm.

However, the RPMs I'll be using are around 1000 to 8000 rpm.

This makes it difficult to use as a reference, so could you please give me some advice?

I'm thinking of using the NC Roadster as a reference, as it has a similar engine, and I've heard that the ID1050X would be appropriate.

The graph shows that the duty cycle is around 33% even when used up to 8000 rpm.

I think the most common range for practical use is around 2000 to 6000 rpm, but at that point it's below 20%. Will it work well in these conditions?

The ID1050 seems to have the smallest duty cycle, but looking at the duty cycle on the calculator, it still seems too high. Will it really work well at this speed?

The original injector seems to be about 200cc.

However, I think this is too small.

I use the ID1050x in my Mazda MZR 2L race engines (same engine as your 2L Duratec). They have worked well for me for more than 10 years. What ECU are you using with the Caterham? I have used MBE and MoTeC, both had no problems with those injectors.

Thank you. My ECU is EMU Black.

I purchased ID1050XDS for Duratec 2.0 Engine (Almost same with MZR Mazda Miata NC).

But the injecttor’s neck is too short so its connector hit to the engine head.

Can I do something?

You don't have the correct combinations of upper & lower adapters for the Duratec/MZR. Here is a picture of mine (installed, showing a shorter purple top, and silver bottom adapter):

Here is a picture of new ones showing what will work with the Duratec/MZR The box identifies these as 1050.60.14.14B.4