Injectors maxed out? - Z31 Performance

onefast87

Senior Member

Posts: 696
#1

Injectors maxed out?

08-22-2013, 06:15 AM

Im running 500cc injectors with a walbro 255, stock fuel pressure, with a hy35 and the injectors seem to max out at 17-18 psi.MS2 is the ecu.
I could run 11 psi on the stock injectors before the duty cycle went over 90%.

Does this seem right?
I was hoping to max out my map sensor at 21 psi before the injectors quit.

http://www.youtube.com/user/onefast87
Kimbro Slice

Senior Member

Posts: 1561
#2

08-22-2013, 10:22 AM

Do you have a fuel pressure gauge on the rail? Usually aftermarket fuel pumps bump up the pressure in the rail, even if you're running larger injectors. Not that the fuel pressure could max the injectors that hard or anything, but just a thought.

2001 Mazda Miata LS
also a 1989 Nissan 240SX

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FlawleZ

Senior Member

Posts: 1971
#3

08-22-2013, 01:19 PM

Just shooting in the dark without knowing fuel pressure.

Originally posted by Andrew84zx
tell her your car is so fast it will make her panties fly off

545 RWHP & 540 RWTQ
onefast87

Senior Member

Posts: 696
#4

08-22-2013, 08:11 PM

Last time i tested it had good fuel pressure.
I was thinking about installing my aeromotive fpr this weekend!

http://www.youtube.com/user/onefast87
Chrisw_2003

Senior Member

Posts: 2503
#5

08-22-2013, 09:17 PM

and a fuel pressure gauge while you're at it!
onefast87

Senior Member

Posts: 696
#6

08-23-2013, 07:59 PM

I also have the gauge for the aeromotive fpr!

http://www.youtube.com/user/onefast87