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Go Back   Corvette Action Center > 1984 - 1996 Corvettes > C4 Technical and Performance


C4 Technical and Performance For technical and performance related discussion of 1984 - 1996 Corvettes.

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Old 03-14-07, 07:24 AM   #1 (permalink)
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vetteboy86 is offline
 
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Join Date: May 2003
Location: South Bend,IN
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My Corvette(s):
86 Black Vert "Indy 500 Pace car replica"
Default Injector Duty Cycle.....

I am still fighting my fuel issue so I scanned the car last night. Basically I am wondering from you guys who have software to scan your car, what kind of injector duty cycle were you seeing. I am seeing upwards of 70% at which point my fuel pressure drops off and the car runs like pooh.
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Mods to date:
383 Stroker(Eagle Rotating Assembly), comp cam, ported heads,5 angle vavle job,,Cat Back, larger intake and exhaust valves, ported plenum, Ported and siamesed runners, Big Mouth Manifold with EGR delete,TPIS Long Tube Headers, Holley AFPR, MSD 6AL, MSD coil, MSD 8.5mm wires, 30# injectors,255 LPHWalbro fuel pump, Vortex Ram Air, Air Foil, MAT Relocation kit, TB Bypass,Heated 02,2400 RPM stall torque converter, Pioneer Head unit, Infinity speakers.

Mods soon to come:
3.73 rear gears.

Other vehicles:
1973 Bucaneer Red Pontiac Trans Am 455 w/4sp
1971 Starlite Black Pontiac Formula 455 auto w/air.
2004 Victory Red Chevy Silverado Z71 5.3

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Old 03-14-07, 01:38 PM   #2 (permalink)
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Craig do you remember what my duty cycle was when we scanned my car? Let me know if you want to scan it again. You know where the keys are, but just put some gas in it when you are done .
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Old 03-15-07, 02:34 PM   #3 (permalink)
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1984 maroon Z51 auto 200K miles
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Is this at WOT? 70% shouldn't be a problem. The "rule of thumb" is anything over 80% is considered static. Maybe your FP is boycotting? Or regulator?

Bill
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