I'm wondering if getting a JCW tune on my r53 will allow me to run 440# injectors? Reasoning I have is that the car can adapt 15% (ie you can run 380s with no tune on a stock r53).. since the JCW tune is set for 380s, could I go 15% larger to 440?

Current mods are 17% pulley and AFE intake. I can get the JCW tune locally, hence why I ask.


Thanks!

 

I put a cam in along with the 440s and then did a new tune. Will send you a PM.

 

You might be able to run it, but I don't think I'd recommend it.

330s actually flow closer to 350 IIRC. The jump from them to the 380s is smaller than the name suggests. Also - it's my understanding your computer will adjust your injectors to run on the current maps. You can't just swap in new injectors and magically find horsepower. If you're doing it, get a tune to utilize them. But I also think there's plenty of room in the 380s for MOST bolt on mods and 440s aren't really required.