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b18c1 shortblock vs. b18c5 shortblock

Discussion in 'General Tech and Maintenance' started by D See 2, Jul 5, 2003.

  1. D See 2

    D See 2 Senior Member

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    what are the differences between a gsr and a itr shortblock? i can get a gsr shortblock for diRRRRt cheap. while i have it out of the car, i would like to build the bottom end. a few questions:

    1. What are the differences in rod strength?
    2. Are ITR pistons a direct fit?
    3. If i go with ITR pistons, should i get ITR rods as well or are the GSR rods comparable?
    4. So basically, the only difference between an itr and gsr block is the pistons and rods?

    thanks in advance...
     
  2. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

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    im pretty sure the engines have the same bore and stroke so i dont see why the pistons and rods wouldnt fit with no problems. what are you building? where can you get a gsr block from dirt cheap? how much? they got other parts? anyway, i would go with the itr internals, i would think they are stronger since the motor is built from the factory for higher revs, and such, and with an added plus, the gsr block has a stock crank girdle. hope i was some help.
     
  3. asmallsol

    asmallsol Super Moderator

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    The oil pump is diffrent. Check out the post by chet about him getting his ITR short block. He listed alot of it.
     
  4. D See 2

    D See 2 Senior Member

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    is everything about the crank the same?
     
  5. JDMilan

    JDMilan Senior Member

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    yup, pistons, oil pump are different. Rods not sure about but they are most likely the same.


    the main differences with the two full motors is the tranny and head.



    Milan
     
  6. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

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    itr block also has an external oilcooler, so you know its built as a race motor.
     
  7. B16

    B16 Super Moderator VIP

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    rods are different, the type r rods contain more chromoly to make them stronger.
     
  8. Domeskilla

    Domeskilla Senior Member

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    gsr also has a crank girdle and i think block guard.. something the ITR dont have..
     
  9. B16

    B16 Super Moderator VIP

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    no, the itr does have a girdle
     
  10. JDMilan

    JDMilan Senior Member

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    tru ITR has crank girdle and so does the GSR.

    external oil cooler??? as opposed to an internal one??

    As far as I know I don't think honda's ever ran a oil cooler.




    Milan
     
  11. NoJokE

    NoJokE Senior Member

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    "Factory oil coolers are normally a small water-cooled device sandwiched between the oil filter and engine block", i got that from the KS Motorsports site. I have personally never heard of honda running an oil cooler myself so i dont know.
     
  12. JDMilan

    JDMilan Senior Member

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    hmm could be, but the other post was refering to an actual oil cooler "like a greddy unit" something that usually runs on oem turboed rides.



    Milan
     
  13. daviid

    daviid Member

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    the block themselves are exactly the same. the internals are different, cant remember exactly which parts are different tho
     
  14. pissedoffsol

    pissedoffsol RETIRED

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    itr has better...
    intake manifold (single runner, shorter runners, bigger plenum)
    cams
    valve springs
    valves (lighter, higher flowing)
    bowl port in head
    pr3 casting head (higher flowing as proven by alaniz)
    RED VALVE COVER!!!!
    chrome valve cover grommets
    faux carbon fiber plug cover and chrome oil cap on jdm 98+
    lighter flywheel
    better clutch disc and pressure plate
    LSD
    gearing (closer gearing
    aluminum tranny brace
    62mm bore throttle body
    better header (depending on motor, jdm 98+ has 4-1)
    shift linkage + shifter (lighter/shorter shifting)
    jdm has aluminum a/c mount
    rods (lighter and weight matched within a certain spec, i dont remember)
    pistons (coated skirts, higher dome, thicker ring lands)
    crank (fully counterweighted and reinforced/beefed up for high rpms)
    assembly (hand assembled motor!)
     
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