View Full Version : Fuel Injectors

06-11-2007, 06:08 PM
Hey, does anyone know where I can get my fuel injectors cleaned and tested?

06-11-2007, 06:51 PM
there's probably a thread here or on e30tech about cleaning injectors. they're easy to take out, just soak them in some injector cleaner, maybe?

if your gonna go that far, just buy a set of S50 injectors (19lb) already cleaned + flowtested. i did that with my car, and immediately noticed a difference. car pulls way harder, and seems to rev easier and idle smoother.

when i took out my old injectors, they had a lot of crud around the edge, but the port itself was super clean. so they werent clogged.

06-11-2007, 07:24 PM
ok Thanks.

06-11-2007, 07:44 PM
Would it be wise/feasible to get better injectors (Design type II as per the performance thread). Is it simply swapping the old ones or does the ecu need tinkering and do I need a fuel pressure regulator?

I ask this becuase I am in the process of rebuilding/getting a new head.
Also would I get better gas mileage with new injectors if I left everything as is(i.e. not tinkering with the ecu and getting a pressure regulator)?

06-11-2007, 07:50 PM
One more question. What about design type III?

06-11-2007, 08:10 PM
what is design type III? the ones i put in (S50) are design II. no special hardware required. i just slapped them in, they connect up perfectly. its a 1 hour job, no joke.

havent gone through a full tank of fuel since the change, ill let you know when i do.

06-11-2007, 09:20 PM
Design Type III


06-12-2007, 08:00 AM
Check out http://www.fiveomotorsport.com/Injector_SetsBMW.asp

I had the same question about Design III. These guys sell OE Design III injectors. Don't know what it Design III is either.

06-12-2007, 03:09 PM
don't forget to get a proper chip from MarkD for the s/m50 17.5# injectors if you don't want to run too rich

06-14-2007, 09:49 PM
don't forget to get a proper chip from MarkD for the s/m50 17.5# injectors if you don't want to run too rich

is this absolutely essential? i know its best, but i havent had any driveability/idle problems with no changed electronics :confused: