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Need help building from the pros

Discussion in 'Engine Building' started by Burrows_M, May 8, 2009.

Is a high compression B18C the smart thing to do?

  1. Definatley

    6 vote(s)
    85.7%
  2. No way

    0 vote(s)
    0.0%
  3. Yeah but there may be problems

    1 vote(s)
    14.3%
  4. No, can get better specs for less a different route

    0 vote(s)
    0.0%
  1. Burrows_M

    Burrows_M New Member

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    I need some help building my motor to what I want. I know the basics but that's about it. I'm getting ready to drop a B18C in my 99 ek and I want to go all motor. So far all I know what to get is my block bored out +2.5, ITR pistons 83mm, 12.5:1, a new head, P&P the head and get tuned. I have a buddy who did all this to his teg but he said there was a lot of other shit he added to maintian such high compression. As of right now he's really busy building his race car and I can never get a hold of him to find out what the other things were. If you could help me with a build I would really appreciate it.

    I forgot to add that this is a complete swap. Comes with 35k miles on the motor, LSD tranny, ECU, axles and half shaft, shift linkage, motor mounts, alternator, starter, clutch, flywheel, intake manifold, exhaust manifold, fuel rail, injectors, distributor, engine harness, and all sensors. What I would like to do is instead of put the motor in and then have to replace stuff with aftermarket crap, I just want to replace it all when the motor is out of the car and drop in a fully built motor.
     
    Last edited: May 8, 2009
  2. red91efhatch

    red91efhatch New Member

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    12.5:1 is plenty of compression for stock sleeves, are you planning on going higher?
     
  3. Burrows_M

    Burrows_M New Member

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    I'm not sure how high I plan on goin, the only piston set higher that I saw I think was 13.8:1 but i'm not sure
     
  4. CAFROG

    CAFROG Honda Minion VIP

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    No higher on stock pistons and pump gas...pushing it as is IMO

    Need a fuel pump, re-programmed ecu, dyno tune

    Building a motor....you tearing it apart and putting it together yourself? If not....double your swap cost to have it stripped, honed, cleaned, and assembled.

    Look into different theories/opinions on breaking motors in too
     
  5. Burrows_M

    Burrows_M New Member

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    A friend and I are building it ourselves yeah. Just havin a machine shop bore out the block and port and polish. And as for the gas I would be using the 94 octane with a bottle of 180 octane booster in every tank
     
  6. CAFROG

    CAFROG Honda Minion VIP

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    Be careful on who is port and polishing your head. Most machine shops are V8 Mentality and they will most likely rob horsepower. Leave it stock or find someone reputable....port flow is my recomindation.
     
  7. Burrows_M

    Burrows_M New Member

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    So i decided to keep my stock bore size, gonna go with the Wiseco 81mm 13:1 ITR pistons
     
  8. CAFROG

    CAFROG Honda Minion VIP

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    How is that for clearance issues between valves and piston?

    If piston size went down and compression went up....longer rod? Or crank? Stroked?

    Thats why I ask about the clearance issues. I'm not too knowledgable on such build specs.

    Is 81mm stock? Shouldn't you go a little bigger? (81.5mm) so cylinder is honed out and straight as an arrow? Maybe I've been told wrong.

    There's OEM piston size and OEM re-build piston size...this I know.
     
  9. Burrows_M

    Burrows_M New Member

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    I'm not exactly sure about the clearance. But yeah 81mm is stock bore size. Lol im lost on this basically, all I know is ive seen them built like this and I know they work. I'm trying to get some help from people who know from experience, so I think im as lost as you
     
  10. CAFROG

    CAFROG Honda Minion VIP

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    Make sure its a re-build size piston.....that way the cylinder is like brand new after its honed...rather then putting in a new piston tnat is the same size as the old one and cylinder walls that are use to a worn out piston/ring combo

    Call an Acura dealership and ask them about the brand new re-build pistons that Honda offers.
     
  11. Burrows_M

    Burrows_M New Member

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    This is all I know about the pistons i'm looking at

    Bore mm/inch - 81.00/3.189
    Stroke - 3.433
    Rod Length - 5.433
    Comp. Hight - 1.181
    Head cc's - 41.5
    Dome Dish - 8.25
    Gasket Thinkness - .028
    Deck Clearance - .017-
    Block Hight - 8.347
    Compression Ratio - 13:1
    Pin Diameter - .827

    That's about it lol
     
  12. CAFROG

    CAFROG Honda Minion VIP

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    I don't think you'll be at 13:1 compression but I could be wrong. If the pistons are OEM size...no way its 13:1
     
  13. Burrows_M

    Burrows_M New Member

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    It's not a stock piston. I'm shooting for high compression, the stock compression is like 11:1 and i'm looking at different pistons right now that range from 12.5:1 to 13.8:1
     
  14. GlassHeadlights

    GlassHeadlights West West Yall

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    In my opinion when you go over 12.5:1 thats pushing it for longevity. You wouldn't see 250,000-300,000 miles out of the motor. But I don't know my shit, It's just the way I see it.
     
  15. Burrows_M

    Burrows_M New Member

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    Ok guys, i'm gonna have to re word this to try and get answers. I have a 99 EK and I plan on doing a JDM B18C1 swap. I'm looking for a set up that can put up good numbers (200+ whp) and still be reliable for a daily driver on pump gas.
     
  16. DESPAIN

    DESPAIN yep....mmhhm.......yep...

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    FI..........ftw!!!!!!!
     
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