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HowlerMonkey

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Posts posted by HowlerMonkey

  1. Stock ECU mileage numbers are tainted by the fact that any time the engine is running over 3500 rpms, it is no longer listening to the 02 sensor and will richen up a bit because of that.

     

    That said, I got 19mpg towing a U-haul trailer 5 feet tall by 8 feet long or so with a 280zx turbo in which the turbo died halfway between washington DC and orlando.

     

    Mileage without the trailer wasn't much better since the car was made with a 55mph speed limit in mind and that driving at or over 70 in a 280zx turbo automatic puts you into open loop territory mentioned above.

     

    The turbo dying only held me up for a long lunch at burger king where I cut a small blocker from the sliding cover off of a floppy disc (stainless) and slid it between the turbo and the drain tube so exhaust would not flow into the pan through the ruined bearing as well as swapping the pressure gauge sender from the T fitting to straight into the block.

     

    I drove that car another 10k miles with the impeller reduced to a small ball of aluminum and the car never suffered the slightest scratch in the cylinder bores.

     

    I've done that twice in my lifetime on my own personal cars.

  2. Usually it's leaking battery that causes that but one thing many people ignore is rust from within.

     

    Anybody who's eaten drive-thru fries can probably remember brushing the salt from said fries onto the floor.

     

    Combine that with wet feet on a passenger and you end up with salt water.........inside the car.

     

    Car's aren't designed to combat salt water on the inside so the passenger floor rusts out first on most cars regardless of make.

  3. Never had a true manual rack on the 300zx myself but the slower ratio required to make effort tolerable on a car the weight of a 300zx may diminsh the experience.

     

    If are able to fit a rack from an early Z car, it may be a fast enough ratio but you end up with again............too much effort much like in the case of a non-assisted z31 rack.

  4. I've been running without assist for 20 years and I can tell you it is hard on steering wheels and that damper that lies in the thru-tube for the firewall on the steering shaft.

     

    The effort is hard enough such that you can easily detatch the padding from the skeleton of the steering wheel.

     

    I went to a Z32 wheel and back to assist.

  5. I engineer engine management systems for a living and my experience in engine management systems design tells me this idea is not ready for prime time.

     

    Believe me, I know the failure rates for sensors and what engine management systems do when fed the wrong information from said sensors.

     

    Also...........the inertia of the valves and pistons moving in opposite directions at a pretty good rate is enough to bend the valves if they contact. They don't need a cam behind them to bend.

     

    Formula one is not a good example as they suffer failures directly related to the valve actuation mechanism more than any other failure in recent years.

  6. I run a turbo on the MN47 head but it is part of the stock L24e setup.

     

    Running stock boost it does well and has been for 30k miles.

     

    Damn the port shape........I have no leaks.

  7. "Currently.........I know of no engine that will be mechanically ruined by a bad sensor input."

     

    As an engineer for standard motor products ECU division, I can personally vouch for the fact that the most common sensor malfunction pertains to sensors that measure crank and cam angle..............regardless of manufacturer.

     

    Any unusual waveform from a failing sensor can easily net you piston meeting valve in the setup being discussed here.

  8. On the turbo automatics, there is a blocking plug on the block within the diameter of the oil filter sealing surface for a relief valve. In all others, there is a bypass valve in the same place to keep pressure at the filter below what would explode from either overly thick oil in low temps or a clogged oil filter.

     

    In the turbo automatics, the bypass valve is in the housing that feeds the cooler lines.

     

    I've run without the cooler and bypass for years on my cars but you must make sure you change the oil filter before it is clogged or the pressure rises in the filter.

     

    I prefer my oil filtered all the time rather than have it bypass and not get filtered.

  9. He'll definately need the shorter distance between shifter and where bellhousing meets engine in the z car much like you would probably have an easier time with the pathfinder FS5R30 tranny than using one out of a Z32.

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