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b20a2 swap

Discussion in 'Engine Building' started by gomes, Feb 23, 2006.

  1. gomes

    gomes Junior Member

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    he guys i need some help over what to do i`ve got a b20a2 prelude blok i want to swap the head for dohc vtec
    i was thinking b16a1/2 and i want to resleeve it to a 84,5mm bore because it now has a 81mm bore and a 95 stroke what would i need more? i don`t want to turbo it because thats to expensive but still want maximum power

    please help
     
  2. Z6CRX

    Z6CRX übber ɐɾuıu etarip

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    what car is it going into, I'm dont think those are standard B-series motors
     
  3. Punisher

    Punisher Member

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    Regardless of chassis. Your project will be possible if it was a B20 CRV block.
     
  4. gomes

    gomes Junior Member

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    its going in a civic coupe from 98


    why won`t it work on the b20 from the prelude?
     
  5. 97CTR

    97CTR Senior Member

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    because it won't.
     
  6. brian11to1

    brian11to1 Senior Member

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    it wont work becuase the b20a2 is a piece of shit engine. they share very very little in common with most b series engines. as a matter of fact, you can probably pick up a b20b4/b20z2 for what you are going to spendin custom fab for this worthless hybrid.
     
  7. Z6CRX

    Z6CRX übber ɐɾuıu etarip

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    B20A2 is like the transmissions from the 88 civic, different splines and wont work with anything but ones from 88's

    A b20 from a CRV will work much better, just a mild build the bottom end build and pinning the block will be suggested because the sleeves are thinner on the B20 than a normal LS.
    the prelude and accord B series dont seem to swap over to the civc / integra b series
     
  8. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    yeah your fucked with the b20as....they just have funky mounts and bolts when compared to the rest of the b-series. check the wikipedia article on the b-series. i think bastard child is used to describe it.
     
  9. gomes

    gomes Junior Member

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    yeah you guys were right yesterday i`ve bought a b16a2 head and it doesn`t fit.The guy who sold me this engine said that it would fit and said that he had compared the gaskets i`m going to try to get him to swap this blok for another one where the head does fit on

    any suggestions? i would like to know where the head does fit on i`ve heard that this could fit another series than the b series
     
  10. pissedoffsol

    pissedoffsol RETIRED

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    b20a / b21a from the preludes don't work for anything.

    the b20b/b20z from the crv will work.
     
  11. gomes

    gomes Junior Member

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    and witch of the two will be better ?
     
  12. pissedoffsol

    pissedoffsol RETIRED

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    the block castings are practically identical. its the compression/heads/IM that have some differences.
     
  13. brian11to1

    brian11to1 Senior Member

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    heads are the same in most cases. however there is the p8r heads that are rare. otherwise... b20b's and z's came with the p75 head...
     
  14. gomes

    gomes Junior Member

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    i spoke with the company that sold me the block and were going to swap it for a b20b or a b20z or its going to be a b18

    if i would get the b20b/z and have a b16a2 head and b16a waterpomp i have to use the gsr timingbelt rigth?

    and to witch size could i bore the block the block?

    i`m going to run JE pistons and aftermarket rods
     
  15. gomes

    gomes Junior Member

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    witch kind of axles sould i use ?
    i couldn`t find in the parts list its goin in a civic coupe `98

    and how far can i bore that blok without other sleeves?
     
  16. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    i wouldnt bore the block at all....just use standard size, i think its already at 84mm (off the top of my head...if yall havent noticed, im out of the information loop lately....boookooos of work)
     
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