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Pistons in the ls

Discussion in 'Engine Building' started by 90sihatch, Nov 7, 2005.

  1. 90sihatch

    90sihatch Senior Member

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    I've been doin some reading, and ls vtec and turbo are not really options on my budget, so I might try to build the ls. Its a 92 motor that I'm running obd0 in my 90 si. I read that b16a pistons will bolt up to my ls rods and raise the compression, is that true? If so, how much will the compression raise and will the rest of the motor be able to take it? I also think cams would be involved in the build, but I have no idea which ones to go with. The car is my daily driver, so I want it to stay reliable, but I need more power.
     
  2. formby

    formby learning in progress

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    yeah you can use the usdmpr3/jdm p30 b16 pistons and you're looking at 11.5:1 +/- CR....i would send the ecu to get chipped and then dyno tune
     
  3. 90sihatch

    90sihatch Senior Member

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    yeah i was looking at that phearable or whatever, but I don't really understand what chipping does. Should I do that before or after pistons?
     
  4. jimboburgess

    jimboburgess Go fast, Go Cheap

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    chipping add more to the original program so the engine can pull maps for when more fuel is needed
     
  5. cycloneb18c3

    cycloneb18c3 Senior Member

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    most of the chips they sell on Ebay and stuff are junk. they just advance the timing, and increase the fuel flow to the engine, which isnt necessarly the best way to tune an engine. The best way is to get your car dyno tuned, you'll get the best bang for your buck, and your motor will be running correctly.
    I know that dyno'n something like what your building might seem overkill, but most chips they sell arnt setup for your exact motor.
     
  6. formby

    formby learning in progress

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    i think with a little more fuel psi you wont need to burn a chip....but i'm not possitive.....take it to a dyno
     
  7. 90sihatch

    90sihatch Senior Member

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    My only problem is that dynos are nearly impossible to come by in southern Iowa.
     
  8. MikeBergy

    MikeBergy Blah blah blah....

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    So go buy a wideband and learn how to tune it yourself.
     
  9. 90sihatch

    90sihatch Senior Member

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    Ok so back to the pistons, will I really get any performance out of putting higher compression pistons in?
     
  10. formby

    formby learning in progress

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    yes...more hp/tq
     
  11. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    [​IMG]

    Higher compression is what an all motor setup is all based around- that and the cam profile.
     
  12. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    :werd:

    bills old hatch had a B18B with a PnP'd head some JDM B16 pistons (about 11:1cr) and crower 403(?) cams
    everything else was pretty much stock
    semi hacked exhaust
    test pipe
    stock exhaust manifold
    crappy short ram intake
    stock intake manifold
    stock LS ECU
    stock LS tranny

    and it hung right with my ITR swapped sol
    i would have loved to see what that thing could do with the rest of the stuff finished up
     
  13. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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  14. 90sihatch

    90sihatch Senior Member

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    damn. sounds good to me. how much does a mild port and polish generally cost? I know it depends on a lot of things, but a very general estimate?
     
  15. 90sihatch

    90sihatch Senior Member

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    Ok so what about installing the pistons? I was told that it will need to be honed to get a proper seal? how much is that usually?
     
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