turbo injectors selections!

[dirty thirty]

what is the most common injector used of a turbo m20.
My build is a 2.7i with a stock eta bottom end and a ebay turbo kit,im goin with the dms ems system form blueapplesoda and he is saying my # 19 injectors are to small.

i did some searching and found # 24 mustang injectors , but whats years mustang do they come out of 4.6 5.0?
im only looking to get 300whp max , nothing to crazy !!

what are you running!
thanks

[dirty thirty]

whos running 42 lbs from ford out of a 5.4 supercharged

[sayed ali]

42lbs should be fine for 300whp

[MR 325]

When you're using MS you want to run large injectors. It's better to run a big injector at less duty cycle than a small injector at 100% duty cycle. I also have one of the DMS kits and Derek recommended I buy 42lb injectors which I am running now.

[dirty thirty]

why is this ? you the injector isnt working so hard ?

When you're using MS you want to run large injectors. It's better to run a big injector at less duty cycle than a small injector at 100% duty cycle. I also have one of the DMS kits and Derek recommended I buy 42lb injectors which I am running now.

[dirty thirty]

42lbs out of a 5.4 supercharged ford lightning are here, dms ems kit earlie next week

[codrum]

Injectors aren't meant to run at 100% duty cycle, you risk running into lean spots in your tune when atmospheric and other conditions change. Definitely err on the side of caution on this one and get decently sized injectors: 42lb/hr.

[Dj Buttchug]

as earlier stated bigger with ms is better. im running 970cc injectors on my m42 setup

[codrum]

as earlier stated bigger with ms is better. im running 970cc injectors on my m42 setup

970cc is really large, how much boost are you running to require those? Don't forget if you go too big you lose tuning resolution in the lower RPMs and the idle can be hell to get right.

[dirty thirty]

cc - lbs per hr what the conversion math?

[codrum]

It's roughly a multiple of 10.5: 42lb/hr = 440cc

[dirty thirty]

thanks!

It's roughly a multiple of 10.5: 42lb/hr = 440cc

[Kvasi]

On an 6syl you need atleast the same cc injectors as engine horsepower. 300 HP -> 300cc injectors, or bigger.
Going E85, add 40% injectorsize.

[dirty thirty]

and is this fact or rule of thumb , 42lbs = 440 cc roughly . 440whp would be the most power i can put down ever? what about being boosted or nitrous?

On an 6syl you need atleast the same cc injectors as engine horsepower. 300 HP -> 300cc injectors, or bigger.
Going E85, add 40% injectorsize.

[Q5Quint]

http://www.megamanual.com/v22manual/minj.htm#size

Note: I think this oversizes injectors a little bit. If your car comes with 14s and this equation tells you to use 17s with 175 hp....safe side.

I was hitting 64% duty cycle on 24s at 7.5 psi... 80% is the high mark so its getting close. If you are trying to go for 10psi and up you will want bigger injectors than the stock moronic can handle although some folks manage to make 32lbers work in there with a rrfpr and a lower start fuel pressure to keep the idle right and not run out of fuel under boost.