JCribb
Old Army truck mechanic
I’m probably going to get blasted for parts of my build, but I will share it anyway.
The truck: 1994 ECSB Z71 5 speed
The new engine: .040 350, 906 vortec heads, mellings mtc-1 cam specs out at:
intake/exhaust duration @.050 lift 204/214
Intake lift with factory rocker arms: 0.420in
Exhaust lift: 0.433
LSA 112
Shorty ceramic coated headers, EGR delete, new stock style distributor, Taylor wires, AC Delco R45TS plugs, tuned by fastchip from Tulsa Oklahoma. Idle set at 800 rpm, every TBI mod possible.
Never been on a dyno, but good grief this sucker pulls hard all the way to 4500 rpm (cam limited). Whatever the output is, has certainly caused multiple damage issues to the transmission and rear axle. First transmission was the factory one with 278k, but it took out two rebuilds afterwards. The 10 bolt gave up living too at 288k, not that’s any surprise there.
Upgrades to the drivetrain included a NV4500 transmission with a ceramic clutch, and a SF14 bolt rear.
Engine temperature is 195 degrees via thermostat or less, electric fans assist in cooling.
No issues with anything other than breaking stuff. 12 to 16 mpg depends on my foot feed .
The truck: 1994 ECSB Z71 5 speed
The new engine: .040 350, 906 vortec heads, mellings mtc-1 cam specs out at:
intake/exhaust duration @.050 lift 204/214
Intake lift with factory rocker arms: 0.420in
Exhaust lift: 0.433
LSA 112
Shorty ceramic coated headers, EGR delete, new stock style distributor, Taylor wires, AC Delco R45TS plugs, tuned by fastchip from Tulsa Oklahoma. Idle set at 800 rpm, every TBI mod possible.
Never been on a dyno, but good grief this sucker pulls hard all the way to 4500 rpm (cam limited). Whatever the output is, has certainly caused multiple damage issues to the transmission and rear axle. First transmission was the factory one with 278k, but it took out two rebuilds afterwards. The 10 bolt gave up living too at 288k, not that’s any surprise there.
Upgrades to the drivetrain included a NV4500 transmission with a ceramic clutch, and a SF14 bolt rear.
Engine temperature is 195 degrees via thermostat or less, electric fans assist in cooling.
No issues with anything other than breaking stuff. 12 to 16 mpg depends on my foot feed .