cammed bolt on 5.3 tech questions
07-26-2015, 12:16 AM
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cammed bolt on 5.3 tech questions Hey guys I got a 5.3 I just put a cam in with flat top pistons and ported polished heads with bigger valves. Anyways while tuning I noticed my injector duty cycle is way up (115) and it runs out of fuel.
I'm about to buy new injectors but I have some questions when you cam an engine it loses some vacuum . How does the pressure regulator work properly now?
I'm about to buy new injectors but I have some questions when you cam an engine it loses some vacuum . How does the pressure regulator work properly now?
07-26-2015, 09:28 AM
#2
pressure regulator works by decreasing fuel pressure as engine vacuum rises (ie idle) so in effect you are increasing your fuel pressure by lowering the engine vacuum closer to 0 inhg, or 100kpa. You merely compensate for it in the tune.