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Whats the difference a1 and b1

Discussion in 'General Tech and Maintenance' started by 92civicb18b1, Oct 20, 2004.

  1. 92civicb18b1

    92civicb18b1 The Trisexual

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    I know we went over this plenty of times, and I can search but I need to leave in 5 mins and don't have the extra time to do it.

    Anyway whats the main difference between the b18b1 and the b18a1, I just wanted to know why the hp rating were less. Is it because of the older head, pistons?
     
  2. brian11to1

    brian11to1 Senior Member

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    B18A1 - 90-93 OBD0/1
    B18B1 - 94+ OBD1/2A&B

    Mainly the differences between the generations were electronics, cams, IM & Exhuast Manifold's.

    Hope this helped.
     
  3. 92civicb18b1

    92civicb18b1 The Trisexual

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    That's what I needed to know, I'm sending that money tommorow. I've been busy lately.

    So If I used a complete OBD1 head with OBD1 P75 it would bring it up to the b1 specs?>
     
  4. brian11to1

    brian11to1 Senior Member

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    Uhm, I guess that would work.
     
  5. 97hatch

    97hatch ?

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    um yes the IM, Head, Cams & Ecu are diffrent
     
  6. brian11to1

    brian11to1 Senior Member

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    The head is not physically different. The only differences are... as already stated.

    Cams, Electronics (including ECU), IM & Ex.M.
     
  7. BodyDroppedNikes

    BodyDroppedNikes ...PENDEJO.... VIP

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    the 90-91 B18a1 motors are obd0 making 130hp where as the B18a1 from 92-93 and the B18b1 from 94-96 are obd1.
     
  8. 92civicb18b1

    92civicb18b1 The Trisexual

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    Yea i know that, I just couldn't understand why there was a difference in power. Figured it out know. Thanks people
     
  9. brian11to1

    brian11to1 Senior Member

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    90-91 = 130 HP
    92-93 = 140 HP
    94-96 = 142 HP
    97-01 = 145 HP
     
  10. racintweek

    racintweek Senior Member

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    not trying to jack teh thread but,
    i have a 92 ls engine in my EF and im using a OBD0 ecm
    will that cause a loss of power(i know its not much)
     
  11. brian11to1

    brian11to1 Senior Member

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    Probably... like a nominal fuckin 2-3 HP... nothing your butt dyno will feel.
     
  12. erebunicrx

    erebunicrx my name is Dale

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    i think the intake ports are bigger on the b's. atleast they were on mine
     
  13. 92civicb18b1

    92civicb18b1 The Trisexual

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    Iiight, I'll just use the b18a1 that I got and build one of the b1's over the winter or something.
     
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