i-VTEC on L-Series

Discussion in 'Honda R/L-Series' started by kotarou, Wednesday 5th Jul, 2017.

  1. kotarou Club Member ★ ☆ ☆ ☆ ☆

    Brazil Alex São Paulo
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    This question is generic but in this case focused on the L-Series...

    I heard that the i-VTEC = VTEC + VTC
    Which means variable timing and lift

    However this is not clear on the L-Series, specifically the L13Z3 (L13A).

    I found this material, which is great but does not solve my doubt.
    Honda Worldwide | Technology Picture Book | i-VTEC

    Does anybody knows if this is true and what kind is used on L13Z3?
     
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  2. h22betterthank20 Junior Member ☆ ☆ ☆ ☆ ☆

    Scotland anon ano falkirk
    9
    1
    L13a = single overhead cam
    L13b = double overhead cam

    both labled i-VTEC
     
  3. kotarou Club Member ★ ☆ ☆ ☆ ☆

    Brazil Alex São Paulo
    38
    13
    Yes, SOHC and DOHC.

    However I think DOHC always have VTC and I'm not sure if the SOHC has.
     
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  4. i-DSI Club Veteran ★ ★ ★ ★ ★

    Belgium Aalst
    1,084
    329
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    Hmm, the L13 engines do not have DOHC.
    There a few versions:
    1) the basic one (I-DSI) as applied in Jazz (2005 EG), Civic (2006 - 2008). NO VTEC, one camshaft, 2 spark plugs/cylinder, 2 valves/cyl. appr. 86 BHP.
    2) 2 special versions for the Civic 4D hybrid and Insight: one camshaft, 2 stage VTEC for Insight, 3 stage VTEC for Civic, both 2 spark plugs/cylinder, 2 valves/cyl
    3) the 4valve version (100 BHP) as applied on later Jazz and Civic 2009 onwards. One camshaft, 1 sparkplug/cyl, 2 stage VTEC.

    Having VTEC or i-VTEC does not depend on the number of camshafts or valves/cyl. It's a commercial name.
     
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  5. kotarou Club Member ★ ☆ ☆ ☆ ☆

    Brazil Alex São Paulo
    38
    13
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  6. i-DSI Club Veteran ★ ★ ★ ★ ★

    Belgium Aalst
    1,084
    329
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    Yeah... but that's not only for the L-series.... Have a look at the engine in my Accord.
    A 2 liter, 16 valve, SOHC, and branded 'i-VTEC'. The only (but remarkable) thing it does is retarding one of the 2 intake valves while closing, under certain conditions.
     
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