LS1 is acting up, I'm thinking fuel?
LS1 is acting up, I'm thinking fuel?
There are "bypass" style regulators that control the pressure AFTER the regulator. You end up with a "dead end" fuel rail, and pressure control becomes a bit erratic with very high HP setups. Every F-Body LS1 engine has this type of fuel system. The regulator is in the tank. Many high HP LS1 systems convert to the full recirculation rails, with the pressure regulator after the rails, because it provide a much more uniform pressure in the system.
Do you think I need to upgrade to a parallel feed then out to a regulator then to tank?
That would seem to be more of a programming issue, contolling throttle "tip in". Problems with the dead-end fuel system, in high HP applications, will show up when there is high fuel demand, not at low RPM/partial throttle conditions.
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