At what point in the MOD journey do you need to bump up from stock injectors?

 

I think people only generally do it when bumping up to a 19% pulley. I haven't done this, as I'm waiting to get it on the dyno for some A/F readings to see if this is actually necessary. I don't really drag my car out to redline very much because there is just so much mid range power that it's not really necessary. Without going into the VERY upper ranges, I think the stock system provides plenty of fuel. Saves gas at other times too. Just my $.02

I know if you have a 19% and want to get a GIAC tune, then they require larger injectors.

 

Thanks for the 2 cents (more like 5 cents worth) .

I found this at presicion mini but it doesn't define what a "modified engines" are.
Fuel Delivery 380cc Bosch Fuel Injectors
Essential for modified engines. The stock Mini fuel injectors are rated at only 330cc. Engine modifications can quickly take these injectors beyond their limit. Result: poor performance and possible catastrophic engine failure due to a lean A/F ratios and high EGTs. Fuel rail limitations allow for a maximum injector size of 400cc.

 

Bart, I'd say your right at the point where you would go through with the injectors. Other than software and injectors your next mods would be what, cam, uprated head, etc. It seems like most people add the injectors when they add the software.

 

I would like to add software and perhaps a crank pulley BUT then thats it - I am done! NO REALLY. More and more my son will be driving the car (turns 16 this week) and I think the car's set-up is just right. Its spirited but not over the top.

PS - took a friend out for a ride. A real performance minded person (currently has a M3) and after winding the MCS out - all this person said "I can't believe what this breadbox can do I gotta get one of these".

 

16 year old son!?!?!

Wow. You are very trusting. Awesome!

I got an AWD Talon with an upgraded turbo and the works when I was a mere 17. Sometimes I'm surprised I made it to 18. I never wrecked the car though. Thanks mostly to awesome family and friends who taught me to drive while i was very very young. You know, karts and dirt bikes and such...

Best of luck with your son and the Mini united.

 

I would definitely do the Vibration Damper. At least upgrade to the 05-06 Damper as it's almost 2 lbs lighter and of a solid construction (not shitty rubber like ours). Your Damper will probably give out, just a matter of time as the 02-04's are truely a piece of shyt lol. What Crank Pulley would you replace your Damper with? The M7 piece looks really nice, if my dad had let me go aftermarket, that's what I would've bought.

Suggestion, I'd definitely do the injectors with the software as I'm sure it'll help smooth out the entire power band at the very least.

PS, Will you be attending the auto-x in Hialeah this weekend?

 

There are two things to keep in mind when looking at the injectors...

1) What is the flow at 100% Duty Cycle

2) What is the duty cycle you want to target at red-line at WOT?

Running injectors at 100% duty cycle (always on) isn't good for thier lifetimes, but can be done. And most tuners have a prefered max duty cycle, and that sets the size. Then you hope that they do a good job controlling flow at idle so it stays smooth, and then have at it!

All that said, my ECU thinks my JCW injectors are open more than all the time, so I don't really know what to think with the Mini.

Matt

 

After fittng my cat back, I noticed I lost a lot of top power with stock injectors, so I fitted M7 400CC for a try and i solved the problem, so It does help on higher revs

 

I saw a post about stock injectors will hold until 250 HP.


Could you comprehense a bit more about injectors fixed top-end power loss? (i see u have total of 17% reduction with cai and exhaust, same as me!)

 

stock injectors are rated to 340cc/min i believe. I'd add them on once i'm done my mods just to make sure that the fuel system delivers the fuel with relative ease. I don't want my injectors to come close to maxxing out. Definately not essential, just something i'd do to keep everything "matched."

 

The Mule had stock injectors until we did the turbo kit. It was around 230-240whp. No fuel issues, even up top.

-Brian

 

I (MTH) wrote that stock injectors were good for up to 270 BHP (230 HP). Now that I have accumulated a bit more knowledge about the Mini I have revised that number downward. The injector size seems to be limited by the fuel rail size (and type – no return) and the varying rate fuel pressure regulator to about 400cc. (It also has to due with the incredibly high IATs this car can run.) I recommend the stock injectors for applications up to 190 BHP, the 380cc injectors for between 190 BHP and 230 BHP, and 400cc injectors for over 230 BHP. Thereafter you need to consider changes to the fuel delivery system.
And if you change your injectors it will require an ECU reflash (not a piggyback) to recognize the hardware change.

(Note: I have not tested the limit of injector size because it gets expensive blowing engines. I err on the safe side and rely upon the math of injector specs.)

 

hmmm... any comment from brian.

this is so confusing,the differance in opinions on injector issues as well as pulley's, and plugs is crazy, very few people agree. lol

i would love to see a head to head compasion in ecu up grades and on pulleys up grade's, plugs etc... to see exactly what affect they have on the
car. No magazine has done any of this yet for the mini( i could be mistaken and if i am please let me know)..

I am new my car isnt even in the states yet, however i am ready to spend on up grades..

 

Glad you chimed in - your website was what got me thinking. So based on my current MODS, I assume I am under 190BHP (?) and should stay with my stock injectors.

 

Yes, I would suggest that you stay with the stock injectors.

 

Dont want to start a war here, just wondering what knowledge you are basing this off of. I have only heard(in full detail) one side of the argument(from Randy, and the dyno runs). I am guessing you have done testing on your dyno?

Thanks,

-Brian

 

What About Using Two Stock Injectors And Two JCW Injectors? Would This Work?

 

No, as I said before I err on the side of the injector manufacturer specs. I take into account the fuel rail pressure, the fuel consumption, and max duty cycle desired. I then plug the numbers in the formula and out spits the result of what is required (according to the manufacturer).

 

As my signature reveals I have an older JCW retrofit and have no idea what size my injectors are.
I purchased this car used about a year ago.
Is there a definitive way to tell?
Injector body color? Markings on the injectors? Psychic network?

Paul

 

 

The JCW early packages used stock injectors and were rated at 200hp. Inflated hp ratings with car under warranty or as Dr. Obxnx(?) said the cars are delivered rich?

 

That seems about at the cutoff point I'm speaking of. And Mini decided to go up in size.

 

Do you know what size these are?
I've heard that early JCW were 360 and now are currently being delivered with 380s. Are all JCW injectors this color, or just the 380s?
Thanks,
Pablo

 

early (200hp) JCWs came with stock (340cc) injectors, and were coloured yellow.

The JCW 210 comes with uprated (380cc) injectors, and were coloured blue....