Injectors - Page 2 - United Bimmer Community

**B_w.** · 06-02-2005, 09:03 PM

what injectors do 328's have? i know they are the same as m3 injectors.

from what i have heard there is no advantage to upgrading injectors on a n/a motor.

**BMW328is** · 06-02-2005, 10:34 PM

All 325s have 17 lb injectors. All 328s and M3s have 21 lb injectors. You have to really increase the cfm flow of the motor to need 24 lb injectors with a 328 or M3.

Adding just injectors will make you run rich and increase the chance of a fouled plug or O2 sensor.

**///95M3** · 06-02-2005, 11:18 PM

or cams. Its good to have bigger injectors with cams. My cam kit is comming with injectors

**92 325i** · 05-05-2007, 09:25 PM

Hi there. I have a 92 325i. I have chipped it. Put headers on, CAI, and removed cats. Now would increasing my injectors form 17lb to 19lb be worth it? Say $100 for all 6 new 19lb injectors?

**94bmw325i** · 05-09-2007, 08:37 AM

I would only do it if you also added something like M3 cams.

**Chad...** · 05-18-2007, 03:10 PM

should I get 21lb injectors if I have a 3.5 HFM, turner 3.5 HFM chip, and ram air intake?

**Chad...** · 05-18-2007, 03:10 PM

Should I get 21lb injectors if I've got a 3.5 HFM, Turner Motorsport 3.5 HFM performace chip, and a custom ram air intake?

**B_w.** · 05-18-2007, 04:51 PM

Quote:

Originally Posted by 92 325i

Hi there. I have a 92 325i. I have chipped it. Put headers on, CAI, and removed cats. Now would increasing my injectors form 17lb to 19lb be worth it? Say $100 for all 6 new 19lb injectors?

you would need new software and there is no reason to put bigger injectors in.

**B_w.** · 05-18-2007, 04:52 PM

Quote:

Originally Posted by Chad...

Should I get 21lb injectors if I've got a 3.5 HFM, Turner Motorsport 3.5 HFM performace chip, and a custom ram air intake?

unless you have some very aggressive cams and a motor that is goign to rev higher than stock you wont get significant gains from upgarding the maf.