Anybody know the flow rates for the stock and the jcw injectors. I'm getting ready to add an Alta Top Mount Intercooler Classic (larger Intercooler) in my 05 MCSC with the goal of getting as close to jcw hp as possible. Should I go with the jcw injectors with the larger Intercooler, or stay stock?

 

IIRC they are 340 cc's

 

JCW injectors are 380cc.

Bigger injectors will not be effective unless you get a matching ECU software.

 

Agreed but my UniChip should be able to handle that...

 

If you can get an update from Unichip for the injectors, get it.

On my car, it added smoothness and a bit more power combined with the GIAC software to match.

 

The idea behind bigger injectors is of course to be able to put more fuel in the engine when needed. My car would be fine without them but, the goal is to have the injectors not working in the high range all the time. The pulley is really the only thing i've got that makes it need more fuel. With the bigger injectors they are usually working in the median range instead of 90%. This should make them last longer.

 

I'm doing exactly the same thing, big IC and JCW injectors. I already installed the JCW air box, my question is; when I install the injectors and big IC will driving 4 hours to the Cooper dealership to get a JCW ECU burn be a problem?

 

nope there should be zero problems driving to the dealer

 

only if it is tuned on the dyno with your car!!
you need a unichip tuner for that.
- john

 

well not sure if that is true. my ecu learned that i switched the injectors and pulled fuel from the long and short term fuel trims and now the car runs lean in the top end. working on a reflash for the 380cc injectors and hope this solves this issue. so beware.
-john

 

wow how are you reading injector duty cycle. this is the only way you can make this comment.what makes you think you are running 90% duty cycle?
they won't wear out quicker just more likely to fail (open or closed).

 

So what am I supposed to do ? The only options are to work on the car in the Chicago dealers parking lot, installing the big IC and injectors Have them install my parts ,charging Chicago and BMW dealer prices Or have the burn done first and drive home and install the stuff.

 

I had the JCW ECU flash a couple months ago and still haven't got around to putting in the JCW injectors with no probs, so you can do it that way

 

Same here as I can tell...I am running a little lean from the AFR readings from my dyno and I have JCW injectors on the way.