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Injector duty cycle, fuel pressure?

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Old Apr 30, 2007 | 06:16 PM
  #1  
86Z's Avatar
86Z
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From: CT
Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
Injector duty cycle, fuel pressure?

if i'm thinking correctly 11.81msec @ 5125 rpms are going static correct? i'm running 45psi fuel pressure at WOT should i up it or go bigger injectors, i have 30#'s now.
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Old Apr 30, 2007 | 06:28 PM
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91chevz71's Avatar
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Re: Injector duty cycle, fuel pressure?

Nice car. I think the max is 12msec, so I would say more FP.
Mike
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Old Apr 30, 2007 | 07:36 PM
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Re: Injector duty cycle, fuel pressure?

Originally Posted by 86Z
if i'm thinking correctly 11.81msec @ 5125 rpms are going static correct? i'm running 45psi fuel pressure at WOT should i up it or go bigger injectors, i have 30#'s now.
At 5125 RPM you have 11.71mS to complete the injector firing including the bias times, so, yeah, you're way static at 100% dutycycle. You need at least 20% more injector to be safe and that puts you at 36's or you could up your fuel pressure to 65 psi but your pump volume will decrease HTH
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Old May 2, 2007 | 05:53 PM
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86Z's Avatar
86Z
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25 Year Member
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Posts: 1,992
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From: CT
Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
Re: Injector duty cycle, fuel pressure?

i'm getting away from the FMU i dont want that high of fuel pressure, i ordered some 42lb injectors
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