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B18a/b ?

Discussion in 'Engine Building' started by pills_PMD, Apr 9, 2003.

  1. pills_PMD

    pills_PMD Super Moderator

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    does it matter if you get a b18a or b18b block for an ls/vtec setup???
    i dont run a knock sensor.. so i don't forsee any real difference between the blocks... anyone??
     
  2. lsvtec

    lsvtec GNU/Linux Evangelist

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    If you get a B18A from a 92-93 Integra there is no difference.
     
  3. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

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    what about the pre 92 b18a's?
     
  4. lsvtec

    lsvtec GNU/Linux Evangelist

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    I don't know for sure. I don't know if the sensors are different. You might be able to use the OBD0 bottom, but i have never tried so I cannot confirm.
     
  5. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

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    well i'm gonna try so i'll let you know.
     
  6. Gen2Teg

    Gen2Teg Senior Member

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    use a B18B, the first gen B18A's have 130hp, the 2nd has 140, and the B18B's have 142hp. Not only do the B18b's have more horsepower, but they're newer and should have less miles on the motor. Get the 1st gen B18B cause those r obd1. After 97 its obd2.
     
  7. K2e2vin

    K2e2vin Senior Member

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    that doesnt matter in a ls/vtec. as long as the dimensions are the same, its all good.
     
  8. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

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    yeah the blocks are pretty similar. its the heads that are different, and even then they aren't really different.

    the b18b's gained a little more aggressive cam, and they stepped up to 10mm intake ports(up from 9.7mm).
     
  9. pissedoffsol

    pissedoffsol RETIRED

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    the block has no sensors. its all on the head. either will work fine
     
  10. tomtom

    tomtom Senior Member

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    im running b18a block with 94 gsr head
    knock sensor plugs righ in.
     
  11. lsvtec

    lsvtec GNU/Linux Evangelist

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    Actually the B18A does. Oil pressure sender, and a thermostat are both on the back of the block.
     
  12. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

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    yep, thats how mine is.
     
  13. Civic_88ls

    Civic_88ls Senior Member

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    i have a 92 ls in my obd0 car and i dont even use the coolant sensor with the green plug on the block.. nothin is plugged in it. it runs fine. u can use either of the years.
     
  14. SolReaver

    SolReaver Senior Member

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    :bash:

    96+ = obd2
     
  15. pissedoffsol

    pissedoffsol RETIRED

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    right, but the harness doesn't plug into either of those
     
  16. pills_PMD

    pills_PMD Super Moderator

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    ok. so i found a complete 94 LS engine that is dissasembled for a good price. i'm going to pick it up on wed.!!! thanks guys
     
  17. lsvtec

    lsvtec GNU/Linux Evangelist

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    ???

    I don't know what harness you are using, but mine sure does.
     
  18. pissedoffsol

    pissedoffsol RETIRED

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    i worded that all wrong.

    I'm pretty sure the plugs are the same though, even through it changes obd. its not a sensor that has changed. so it will plug right in with either harness.

    or am i wrong?
     
  19. solblu

    solblu Senior Member

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    One is the same. Honda moved the other one to the Thermostat housing, so it doesn't hook up. This is comparing OBD0 to OBD1, my OBD2 B20Z had the same plugs as OBD1. So it doesn't matter it will hook up even though it has sensors on the block.
     
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