Subaru Enthusiasts Car Club of the Sierras - View Single Post

sperry · 2004-09-09, 12:09 PM

I didn't think injector duty cycle on a stock STi was that high!

However, I'm not sure that having more pressure behind the injectors will change their duty cycle any. It would just add some reassurance that if an injector is maxing out there's at least no shortage of fuel.

In order to lower duty cycles, I think you have to simply get higher flowing injectors (and of course a pump that can supply them). Also, how do you get an injector to run at 105% duty? Doesn't 100% mean the injector is basically locked open?

Anyway, I believe the Walbro pump is a plug-n-play replacement for stock Subaru pumps, but the install still involves the gas tank, so you have to prep carefully. You don't want a fire!

2004-09-09, 12:09 PM	#2
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	I didn't think injector duty cycle on a stock STi was that high! However, I'm not sure that having more pressure behind the injectors will change their duty cycle any. It would just add some reassurance that if an injector is maxing out there's at least no shortage of fuel. In order to lower duty cycles, I think you have to simply get higher flowing injectors (and of course a pump that can supply them). Also, how do you get an injector to run at 105% duty? Doesn't 100% mean the injector is basically locked open? Anyway, I believe the Walbro pump is a plug-n-play replacement for stock Subaru pumps, but the install still involves the gas tank, so you have to prep carefully. You don't want a fire! __________________ Is you is, or is you ain't, my con-stit-u-ints?