High Load Sync to Async
10-27-2009, 07:05 PM
#1
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Car: 90 454SS
Engine: 454 TBI
Transmission: TH400
High Load Sync to Async
Can't get enough fuel at high loads with injectors in sync mode.
I understand that the duty cycle needs to be above 90% for consistent async fueling at high load.
Has anyone devised a method to calculate settings from one to the other without it being a stab in the dark (or basically starting over)?
I understand that the duty cycle needs to be above 90% for consistent async fueling at high load.
Has anyone devised a method to calculate settings from one to the other without it being a stab in the dark (or basically starting over)?
10-28-2009, 11:32 AM
#2
Re: High Load Sync to Async
I dont think settings need to be changed. I recall it flips asynch why less fuel is needed (idle) and when more fuel is needed(AE/PE). I dont believe your OL. choke - cool coolant - AE - PE will be affected. and CL is just looking stoich. Do you have room to increase FP(and change BPC) to achieve adequate fueling?
10-28-2009, 12:26 PM
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Car: 00 SSEi / 94 C4
Engine: 231 / 383
Transmission: 4T65E / ZF 6sp
Axle/Gears: 2.93 / Dana 44 3:45
Re: High Load Sync to Async
is this with a stock fuel pump? stock injectors?
have you changed the Pulse width. increase the LV8 Accel enrichment multiplier vs Delta.. change your ECM injector flow rate a few points higher.. lower % TPS to enable PE. Increase crank fuel PW Multiplier
have you changed the Pulse width. increase the LV8 Accel enrichment multiplier vs Delta.. change your ECM injector flow rate a few points higher.. lower % TPS to enable PE. Increase crank fuel PW Multiplier
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