With the 15% super charger pulley, 2% ATI, all new bushings, LSD, new clutch, header back Milltek, 3 new engine mounts, DDMworks intake, air diverter, upgraded front/rear swaybars,KWv2 coil overs, and a few other miscellaneous suspension upgrades my Mini should be a different car. Would it be worth while to upgrade to 380 injectors and send off ECU for a tune?

 

Personally yes.
While you may be able to tweak a little more power with the extra fuel, the real benefit is to have the "necessary" fuel for those mods, and not worry about running the 330's too hard, or leaning out the motor at higher RPM from lack of fuel.

 

If you're going to go that route just get the 550's from Bosch and a tune for them.

 

Without a cam upgrade (and the resultant higher RPMs), I'm not sure you're going to get the full benefit of larger injectors. You will be able to feel the difference with a tune. The Stage 1 tune on my bone stock MC40 bumped total output by 12hp with no other mods.

 

Get the 380's and a tune from RMW if you don't plan on any other mods. If you plan on any other engine mods go bigger.

 

Yeah, no plans for more upgrades with this engine. I'd like to save up though for a new engine to swap out in a couple of years. Then I'd go for the bigger injectors, but for now if I do it, the 380's are the highest I'd be interested in. I was going to see what kind of tune WMW offers for what I've done to date.