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Did research and this is what I found out.

Discussion in 'Engine Building' started by YangpaNemsay, Dec 3, 2004.

  1. YangpaNemsay

    YangpaNemsay Senior Member

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    Joined:
    Nov 12, 2002
    Location:
    Okinawa, Japan
    Vehicle: EG Si
    Engine: D16Z6
    Goal WHP: ~200hp, eventually ~280

    Problem: Finding an Honda LSD for D-Series.


    What I found out after researching my options:

    1. I can swap in a S20 Transmission from a JDM D15B. They came optional with an LSD.
    2. These D15B LSDs don't hold HP very well. Anything around my Goal WHP #'s would make the LSD crap itself. Limit for these LSDs are 140hp. (From what I read on D-series.org)
    3. If I want an LSD I have a few choices. Swap in a 96-00 EX Tranny and find an appropriate LSD later on such as a Quaife Unit. I can also keep my stock Tranny and upgrade to a Quaife Unit.


    My Options after researching this information:

    1. Use Quaife in D16Z6 Tranny.
    2. Install 96-00 EX Tranny and use Quaife Diff.


    Questions after researching this information:

    1. I compared the EG Si and EK EX Tranny and found some differences which are shown respectively;

    2nd gear: 1.900 vs 1.909
    5th gear: .750 vs .702

    What do these differences mean? I know that the when you change gearing you either stay in that gear longer or shorter. I know that the final drive effects your acceleration through the gears but at the cost of top speed. Would more value in a number given in a gearing value make the gear taller or shorter?
    2. Would it be totally fine to stick with the Si Tranny if I am planning to use aftermarket gear ratio kits anyways?
    3a. If I do decide to switch the the EX Tranny, will I have to use polyurethane bushings designed for the EX Tranny or will it be ok if I use a complete kit designed for the EG Si?
    3b. Also I would still be using a clutch and flywheel designed for the D16Z6 correct?
    4. How much of an improvement on the track would an LSD equipped Civic compare to a Non-LSD equiped Civic?
     
  2. 94RedSiGal

    94RedSiGal Senior Member

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    By track do you mean doing laps around a track? LSD is good for launches and cornering.

    http://www.superhonda.com/forum/archive/in...p/t-158079.html

    I like this passage from this link ^^^:



    And Quaiffe is a helical LSD. Somewhere I have bookmarked some site that had a whole bunch of aftermarket LSD's for the D-series. I just can't find it right now.
     
  3. YangpaNemsay

    YangpaNemsay Senior Member

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