Fuel Injectors maxed out? really!?!?
11-13-2013, 10:08 PM
#1
Fuel Injectors maxed out? really!?!? Mods are:
Stock LS1 longblobk, LS6 intake manifold, ported TB, 4 inch intake system, 85mm MAF, 1 5/8 in shorty headers, full exhaust w/ no cats.
When tuning in open loop, SD, no PE, the AFR is lean under WOT and peak load area. No matter how much I increase the VE I cannot get any more fueling to it. Injector Duty Cycle in HPTuners is reporting values over 100%. Is it time for me to do an injector upgrade???
Stock LS1 longblobk, LS6 intake manifold, ported TB, 4 inch intake system, 85mm MAF, 1 5/8 in shorty headers, full exhaust w/ no cats.
When tuning in open loop, SD, no PE, the AFR is lean under WOT and peak load area. No matter how much I increase the VE I cannot get any more fueling to it. Injector Duty Cycle in HPTuners is reporting values over 100%. Is it time for me to do an injector upgrade???
11-26-2013, 01:57 PM
#6
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what injectors are you running? if you are on stock and with those mods...i can believe it easily. the stock system was not intended for much beyond stock. With the stock pump though, you can provide enough fuel for up to 8 x 32LB/hr injectors rated at 43.5psi -- ACTUALLY at our fuel pressure 37LB/hr (58psi).
FYI, what most people do, is grab the Walbro 255 pump & wiring kit (REQUIRED- TRUST ME) and usually 36# @43.5psi or 42# @43.5psi injectors and continue to mod. Only stepping into forced induction requires a Fuel pressure regulator (MAP referenced) and much larger injectors.
FYI, what most people do, is grab the Walbro 255 pump & wiring kit (REQUIRED- TRUST ME) and usually 36# @43.5psi or 42# @43.5psi injectors and continue to mod. Only stepping into forced induction requires a Fuel pressure regulator (MAP referenced) and much larger injectors.
11-26-2013, 02:56 PM
#7
Factory ls1 28.8 lb injectors are good to near 410-420 rwhp on a dynojet SAE which your bolt on ls1 isn't going to come near. I would say you probably have a fuel pressure problem so put a gauge on it and see what it shows at WOT in the higher rpms.
