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J-spec S4/S5

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Old 12-03-02, 06:44 PM
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SUPRAMAN

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J-spec S4/S5
is there that much of a difference between the S4 TII and the S5 TII. Also does anyone have any hp numbers on the j-spec TII's?
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Old 12-03-02, 06:51 PM
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Here ya go.

Read up.
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Old 12-03-02, 07:02 PM
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yeah i know the hp of the american spec ones but if im going to heavily mod a TII engine is it really worth waiting and spending more money for 20 more hp?
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Old 12-03-02, 07:13 PM
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If youre going to upgrade it, than no. You'll want the S4 motor since it has lower compression rotors.
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Old 12-03-02, 07:18 PM
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really that's good information thanks. I'm having one rebuilt and ported then prolly going to go with a bigger turbo and Fmic in addition to fuel of course.
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Old 12-03-02, 07:24 PM
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If you dig enough, you'll find most rotary drag cars are running the S4 rotor, and with good reason. The compression.
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Old 12-03-02, 07:28 PM
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ya im looking for one as we speak.
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Old 12-04-02, 11:09 PM
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anyone got the actual hp numbers of the j-spec engines?
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Old 12-05-02, 12:32 AM
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Yah I am thinking about running a s4 in my haltech controlled swap, for the lower comp and the mech omp.
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Old 12-05-02, 05:00 AM
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Japanese motors are rated the same as american ones.
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