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Tex Willer

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Posts posted by Tex Willer

  1. We have had some problems with the 1. Generation RB25 (with external coildrivers).

    Seems like the spark dissappears over 14 psi boost, even lower on big turboed/hp engines.

    Don`t know if it is the coildriver or coil that is the weak link, but most likely the coils.

    HKS dli box did not help(as it does on the supra`s)

    Generation 2 coils seems better, but probably not working with the external amps.

  2. Photo-0053.jpg

    Precision makes smaller exhausthousings for the GT40. This one is A/R 0.81 with 69mm outlet.

    They call this turbo GT4067R. Rollerbearing core. 750hp rating. 1.5bar/22psi at 4800-5000 rpm with some good cams. I`ll post my dynopaper when done building/ mapping.

  3. The power output of these engines are often a question of fuel quality.

    Long duration cams will lower compression pressure.

    Bigger turbos/exhausthousings will lower backpressure.

    Very high peak power numbers are possible at high revs, because of the short

    stroke and rodlength/stroke ratio.

    500nm at 4000rpm gives 380hp.

    500nm at 8000rpm gives 760hp. both with the same combustion pressure.

    my answer is I don`t know the limits..

  4. Hello from Norway...

    RB25DET

    Stock block and head, not opened.

    Aeromotive fuelpump/regulator,modified rail.

    Nismo 740cc injectors, Greddy plenum.

    75mm Throttlebody, Electromotive coils.

    350x600x100 Intercooler 3"Tubing

    Modified HKS manifold, Turbonetics T60*5 old school

    HKS W.G., 3"Exhaust, no cat, single muffler.

    O.S.Giken twinplate clutch/flyweel.

    DTA engine management

    353 rwkW/7300rpm(481rwhp)

    366 LbFt /5700rpm

    21psi peak 4800rpm

    18psi @8000 rev.limit

    98 ron pumpfuel

    Dynapack hub readings

    DynoKOKWBoost.jpg

    DynoKOTqAFR2.jpg

    HPIM1422.jpg

    DSC_0249.jpg

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