Just put an 07 motor and tranny (1.6L and auto) in my wife's 08 sedan. All sensors plugged in great, but.....as usual fuel mileage sucks. Put a new timing belt in, motor had 73K on it. We both drive about 60-65, keeping up with traffic. Mileage looks to be around 23/24. Tires are 185/60-15s. Noticed that 60 MPH is about 2300/2400 RPM.
While working on the car, we had rented a new corolla.....which got 37-39 driven the same. Ouch1 technology marches on!
Here is my question, could I get a new custom torque convertor made that was "tighter"? I'm thinking to drop my engine revs about 400-600 at 60mph should help increase the milage. Since the motor wasn't designed to run that
slowly, I would put in new cams or reground cams designed to move the torgue peak of the motor 600-800 rpm lower.
I'm from the v8 world, with an occasional air cooled bug, so I have no experience here. Im trying to do this as low budget as possible. Not going to spend thousands to get four mpg more. Hoping if there are cams they wouldn't be more the $300....no idea on a custom convertor. Cant get a new car now, the corolla would be ideal. LOL! Get a back up camera and steering wheel controls for the radio and phone.
Any input, ideas, suggestions, or experience is greatly appreciated.