Tuning Help
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Joined: Dec 2002
Posts: 146
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From: Oakbank, Manitoba,Canada
Car: 1992 RS (25 th Anniversary)
Engine: 350 Miniram XFI
Transmission: Pro-Built 4L60
Axle/Gears: 3.73
Tuning Help
I need some tuning help or some direction. I have a 1992 Camaro RS running it with XFI, the car specs are:
Engine:
Type: 350 (5.7L) Small Block Chevrolet
Block: 350 Chevrolet, 4.0" Bore, 2 Bolt Mains
Pistons :OEM Cast Aluminium
Rings: OEM Cast Rings
Rods: OEM 5.7" Rods
Crank: OEM Cast 3.48" 1 pc. Rear Main Seal
Compression Ratio: 10:1 approx.
Cylinder Heads: Chevrolet Aluminium Corvette Heads (113 Casting)
Valve Size: 1.94"/1.50"
Camshaft: Comp Cams Hydraulic Roller 230*/240*@.050, .510"/.540" lift, 112 lsa
Valve Train: OEM Roller Lifter Setup, Comp Push Rods, Jegs 1.5 Roller Rockers, Cloyes True Roller Double Timing Chain, Comp 3 pc. Timing Cover
Intake: TPIS MiniRam, BBK 58 mm Throttlebody, Accel 30 lb. Injectors
Ignition: MSD Billet Distributor, MSD 6 AL Ignition Box, MSD Blaster Coil, MSD 8.5mm Wires, MSD Wire Separators, NGK Spark Plugs
Engine Fasteners: ARP
Fuel System: Holley 67 gph/255lph in tank fuel pump, stock fuel filter, stock fuel lines, Jegs Pro-Flo -6 Braided Fuel Hose to TPIS Miniram fuel rails, TPIS AFPR, Accel Fuel Pressure Gauge
Computer: F.A.S.T XFI ECU and Wiring
Cooling: Stock GM Radiatior, Dual Electric fans, 180* Thermostat, Edelbrock Victor Aluminium Water Pump
Exhaust: Hooker 1 3/4 Headers, Mufflex 3" Y-Pipe, Mufflex 4" Exhaust, SpinTech Muffler with 3" Dual Polished Tips
Other: Jegs SFI Harmonic Balancer, Jegs SFI 153 Tooth Flex Plate, March Power and Amp Pulleys, Moroso Oil Pan, ARP 1 pc. Oil pump drive shaft, GM Mini Starter, Moroso Solid Engine Mounts
Transmission: Pro-Built 4L60 Transmission, GM Trans Oil Cooler, Energy Suspension Uerethane Trans Mount
Converter: Precision Industries Vigilante 3200 rpm stall
Driveshaft: GM stock
Rear End: Gm Stock 7.5" 10 Bolt, Posi, 3.73 Gears
I have been trying for the better part of about a week to get the car to idle half decently. I'm new to tuning and the XFI. I don't know if it's the cam or something else. I have the car at an idle of 1000 rpms but it fluctuates up and down from 900 to 1100 rpm, the map also fluctuates. I'm currently at about 13.4 A/F with 0% O2 corr. I have the spark at 30* and the VE is at 38(so far). I'm tuning the car in open loop. Also when I give it throttle it will pop in the higher rpms and the throttle is slow to return to normal. I'm starting to think that the Comp 306 cam is not for me, it seems to be a very wild cam for a beginner to tune. Starting to think maybe I should change cams. Getting frustrated. Some input needed.
Engine:
Type: 350 (5.7L) Small Block Chevrolet
Block: 350 Chevrolet, 4.0" Bore, 2 Bolt Mains
Pistons :OEM Cast Aluminium
Rings: OEM Cast Rings
Rods: OEM 5.7" Rods
Crank: OEM Cast 3.48" 1 pc. Rear Main Seal
Compression Ratio: 10:1 approx.
Cylinder Heads: Chevrolet Aluminium Corvette Heads (113 Casting)
Valve Size: 1.94"/1.50"
Camshaft: Comp Cams Hydraulic Roller 230*/240*@.050, .510"/.540" lift, 112 lsa
Valve Train: OEM Roller Lifter Setup, Comp Push Rods, Jegs 1.5 Roller Rockers, Cloyes True Roller Double Timing Chain, Comp 3 pc. Timing Cover
Intake: TPIS MiniRam, BBK 58 mm Throttlebody, Accel 30 lb. Injectors
Ignition: MSD Billet Distributor, MSD 6 AL Ignition Box, MSD Blaster Coil, MSD 8.5mm Wires, MSD Wire Separators, NGK Spark Plugs
Engine Fasteners: ARP
Fuel System: Holley 67 gph/255lph in tank fuel pump, stock fuel filter, stock fuel lines, Jegs Pro-Flo -6 Braided Fuel Hose to TPIS Miniram fuel rails, TPIS AFPR, Accel Fuel Pressure Gauge
Computer: F.A.S.T XFI ECU and Wiring
Cooling: Stock GM Radiatior, Dual Electric fans, 180* Thermostat, Edelbrock Victor Aluminium Water Pump
Exhaust: Hooker 1 3/4 Headers, Mufflex 3" Y-Pipe, Mufflex 4" Exhaust, SpinTech Muffler with 3" Dual Polished Tips
Other: Jegs SFI Harmonic Balancer, Jegs SFI 153 Tooth Flex Plate, March Power and Amp Pulleys, Moroso Oil Pan, ARP 1 pc. Oil pump drive shaft, GM Mini Starter, Moroso Solid Engine Mounts
Transmission: Pro-Built 4L60 Transmission, GM Trans Oil Cooler, Energy Suspension Uerethane Trans Mount
Converter: Precision Industries Vigilante 3200 rpm stall
Driveshaft: GM stock
Rear End: Gm Stock 7.5" 10 Bolt, Posi, 3.73 Gears
I have been trying for the better part of about a week to get the car to idle half decently. I'm new to tuning and the XFI. I don't know if it's the cam or something else. I have the car at an idle of 1000 rpms but it fluctuates up and down from 900 to 1100 rpm, the map also fluctuates. I'm currently at about 13.4 A/F with 0% O2 corr. I have the spark at 30* and the VE is at 38(so far). I'm tuning the car in open loop. Also when I give it throttle it will pop in the higher rpms and the throttle is slow to return to normal. I'm starting to think that the Comp 306 cam is not for me, it seems to be a very wild cam for a beginner to tune. Starting to think maybe I should change cams. Getting frustrated. Some input needed.
