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performance mod

  1. Need help selecting motor/drivetrain

    Engine Topics
    I'm trying to decide which direction to go with my 71 elky and thought I would ask here. If my dad were still alive I would be talking this over with him, sorry. Anyways, I know just enough to be dangerous as a wanna be motor head and I need some help. My 350 is tired and needs some love. My...
  2. O2 Sensor and ECU

    Performance Modifications
    I just installed a new 4.3 Liter V6 in my 85 Conquista along with a new exhaust system. The new exhaust does not have an O2 Sensor, so the ECU causes the fuel system to run in the "open loop" mode....that is the richest mode....I used an 180deg thermostat and K&N low restriction air...
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