Honda '95- 5th Gear ratio change

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  • #1025962

    Hi Eric, I hope things are well at your end; hopefully you are closer in finding a new shop.

    I am on a transmission “mission” – The tranny is out of a 1995 Honda Civic VX hatchback (high millage engine/car), specifically a “D” series (P20 / A000 ). I bought it new and put over 400,000 miles on it; never did a clutch replacement; all original. Just performed the regular maintenance i.e. timing belt every 100,000 miles, oil stuff like that.

    But the clutch fork (in Bell housing) broke, so I had to remove the transmission to get to it (thanks with your video help). While the tranny is out, it was highly recommended for me do a basic rebuild, such as new seals, bearings, Synchros.

    *** The “ MISSION ” (need help/question} – with forever high gas prices, now also I would like to change my 5th gear ratio – (go longer/higher). My current 5th gear is 0.702, I would like to change it to 0.600 or as close as possible to that. ***

    There are no other ‘official’ gears offered, other than 0.702. Others are said to have thought outside the box and went into other cars/trannys; obviously, it has to physically fit. Perhaps there are custom manufactures out there making these things.

    To find 0.600 gear ratio for my ‘D’ series (P20 / A000 ) would greatly appreciated!

    In addition, through bolt-on components such as exhaust system, distributor, intake and maybe even a small turbo, can we achieve 20, 30 or 40 more horsepower without losing gas millage.
    Do we generally lose gas millage with a turbo??

    Thank, Chris

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  • #1025964
    Rahul Jones
    Rahul Jones

    I cannot comment on the ‘MISSION’ but can comment on the addition of turbos. Before you start the process of turbocharging, there are few things you need to check since your engine is old. Mechanical health (like cylinder compression, unusual noises), leaks, and other issues like smoke from exhaust or clogged pcv. Once you turbocharge your vehicle then the rest depends on the turbo capacity, and air and fuel mixture tuning that determines how much HP/torque, at what RPM, and fuel efficiency. You can gain fuel economy if you have low boost at low RPMs and high boost for high power demands at high RPM. You would also need a reliable tuner to get things right according to your personal needs.

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