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AndrewM · 12-08-2007, 05:14 PM

I dyno'd my 240 the other day and I was in the mid to low 13's on afr's. I have a redtop sr20det and I just realized today that the vacuum source had come off of my fuel pressure regulator. I was running 12psi and I was lean the whole way. It got a little better as the rpm's went up but still pretty lean. Would that vacuum source have caused me to run lean?

I have an upgraded front mount intercooler and a walbro 255 pump and 12psi. Everything else is pretty much stock. I dyno'd 230rwhp corrected, but Im over 5000ft. above sea level so my actual power was 188rwhp. There is no way I should be out of fuel at 190rwhp, right?

12-08-2007, 05:14 PM	#1
AndrewM Join Date: May 2007 Location: New Mexico Age: 44 Posts: 15 Trader Rating: (0)	Could this cause me to run lean? I dyno'd my 240 the other day and I was in the mid to low 13's on afr's. I have a redtop sr20det and I just realized today that the vacuum source had come off of my fuel pressure regulator. I was running 12psi and I was lean the whole way. It got a little better as the rpm's went up but still pretty lean. Would that vacuum source have caused me to run lean? I have an upgraded front mount intercooler and a walbro 255 pump and 12psi. Everything else is pretty much stock. I dyno'd 230rwhp corrected, but Im over 5000ft. above sea level so my actual power was 188rwhp. There is no way I should be out of fuel at 190rwhp, right?