I am doing a 3.4 swap and the injectors from the donor engine have a crack in one of them. I want to replace them but want to know where to buy a reputable set. Ebay has chinesium for $50 for a set, I'm sure those will work great said no one ever. Who do you trust for a good set?

After trying several different injectors, this is what I ended up with that worked satisfactorily in my 3.4 swap. From Motor Man Fuel Injectors. Also check with CS Performance Injectors. I have successfully been running these injectors in my 3.4 since 2018, first on the stock 87 ECM and now on the 7730 ECM conversion.

https://www.motormanfuelinj...ctor-0280150415.html

Bosch EV1 Fuel Injector
Jetronic port / 4 hole nozzle

Flow rates @ 43.5 psi / 3 bar
16.76 lb per hour (My Note: 17# rated injectors flow at approximately 16.666 lb/hr at 3 bar or 43.5 psi. See calculator chart below)
126.5 G per min. (N-Heptane)
176.1 cc per min

15.90 Ohm resistance

Note these numbers. Though the same Bosch part number I originally listed, the BMW part number has changed. This injector is for the BMW M3.
Bosch Part # 0280150415
BMW part # 13641730060

CHART FROM MOTOR MAN FUEL INJECTOR SUPPLY

Fuel Injector Size Calculator
Horsepower (at the flywheel) 160
Number of Injectors 6
B.S.F.C. *

Max Duty Cycle in % 80


Required Injector Static Flow Rate @ 43.5 psi lb/hr 16.666

cc/min

[This message has been edited by fierofool (edited 03-16-2025).]

quote Originally posted by fierofool: After trying several different injectors, this is what I ended up with that worked satisfactorily in my 3.4 swap. From Motor Man Fuel Injectors. Also check with CS Performance Injectors. I have successfully been running these injectors in my 3.4 since 2018, first on the stock 87 ECM and now on the 7730 ECM conversion. https://www.motormanfuelinj...ctor-0280150415.html Bosch EV1 Fuel Injector Jetronic port / 4 hole nozzle Flow rates @ 43.5 psi / 3 bar 16.76 lb per hour (My Note: 17# rated injectors flow at approximately 16.666 lb/hr at 3 bar or 43.5 psi. See calculator chart below) 126.5 G per min. (N-Heptane) 176.1 cc per min 15.90 Ohm resistance Note these numbers. Though the same Bosch part number I originally listed, the BMW part number has changed. This injector is for the BMW M3. Bosch Part # 0280150415 BMW part # 13641730060 CHART FROM MOTOR MAN FUEL INJECTOR SUPPLY Fuel Injector Size Calculator Horsepower (at the flywheel) 160 Number of Injectors 6 B.S.F.C. * Max Duty Cycle in % 80 Required Injector Static Flow Rate @ 43.5 psi lb/hr 16.666 cc/min

Nice, bought a set. Tired of buying parts, want to keep putting parts on to hopefully drive this pile someday.