88 bronco, A few quick ?s
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Joined: Aug 2010
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88 bronco, A few quick ?s
I have a 88 Bronco with 5.8, C6. First question is do these trucks have a lock up torque converter in them? My engine spins at 3200 RPMs at 70 MPH even with my 33s and never locks up to a 1-1 really unless steady cruising, and any up and down hills can be seen in the tach by a couple hundred rpm increase/decrease.
Next question is I am building a 90 short block to swap in when i pull the engine to fix all the oil leaks. It is going to be a .030 over stock short block but I want to put a cam in it. What is the biggest cam I can run that wont cause problems with my stock EFI and not hurt my low end torque to much?
Next question is I am building a 90 short block to swap in when i pull the engine to fix all the oil leaks. It is going to be a .030 over stock short block but I want to put a cam in it. What is the biggest cam I can run that wont cause problems with my stock EFI and not hurt my low end torque to much?
Lead Driver
Joined: Sep 2002
Posts: 9,182
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From: Gateway to the West
The cam must be "speed density" friendly unless you are planning to convert the engine to MAF (mass air flow). The first question I don't honestly know the answer but someone here does.
Fleet Mechanic
Joined: Sep 2003
Posts: 1,716
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The C6 does NOT have a lock-up torque converter. There will not be a exact 1:1 ratio between engine crankshaft speed and output shaft speed in 3rd gear when the engine is driving the wheels. You might see a 1:1 ratio as a transitory state when backing slightly off the gas when cruising, but that's just the road starting to drive the trans, not a real power transfer mode.
You're always going to see either torque converter multiplication when getting on the gas, or some torque converter loss when cruising stable speed and level.
You're always going to see either torque converter multiplication when getting on the gas, or some torque converter loss when cruising stable speed and level.
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