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c5 long block, usdm si trans

Discussion in 'General Tech and Maintenance' started by Seany-izzle, Feb 18, 2007.

  1. Seany-izzle

    Seany-izzle New Member

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    or would it be better shelling out more cash for the complete swap?? I dont know the main differences except the itr has lsd and a shorter final drive. Would the usdm transmission be hindering the motors full capabilities? Would accleration and all that be shittier? Also would you neeeeed the jdm ecu or use the usdm si one?


    thanks
     
  2. eg6sir

    eg6sir Supa Mod Moderator VIP

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    if its a USDM ITR tranny the only difference is the LSD.. same exact gearing.. the JDM ITR has the 4.7 final

    and it doesnt matter which ECU you run for the tranny..
     
  3. AHHVTEC

    AHHVTEC Well-Known Member VIP

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    wow this is almost a noob question lol, it will be fine doing that its not gona make that much diffrents, but unless your gona save like 700 bucks, i would just get the full swap.and use the usdm ecu
     
  4. Seany-izzle

    Seany-izzle New Member

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    i think its how i asked too haha. I know you dont need a new ecu for a tranny. swapping out a b16 in an 00 si and putting in a jdm itr long block. The ecu question was for swapping longblocks, not transmissions. In short its a 00 si thats getting an itr long block with the usdm SI tranny and ecu.
     
  5. AHHVTEC

    AHHVTEC Well-Known Member VIP

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    dont the c5 have butterflies in it,
     
  6. eg6sir

    eg6sir Supa Mod Moderator VIP

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    no thats a GSR... tranny and ecu should be fine
     
  7. AHHVTEC

    AHHVTEC Well-Known Member VIP

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    new one on me but yea the ecu will be fine as long as it dont have butterflies
     
  8. Seany-izzle

    Seany-izzle New Member

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    i just wasnt sure if the usdm tranny was THAT much different to the point where it would jsut be hindering the car.. this got me thinking of it..

    1999 Honda Civic SI $7500 obo but its got 150k on it but he sent me more pictures and the condition is pretty good. He said he'd take 7, but kbb lists his car in good condition for 6500, excellent is only like 7100... Swap in a gsr or itr long block, i/e, keep suspension stock.. have a fun daily for like 10k.. my ej is just in less than stellar condition and has been in an accident... twice (one hit and run outside my apt two years ago..) so putting money in it just doesnt appeal to me. :p
     
    Last edited: Feb 18, 2007
  9. eg6sir

    eg6sir Supa Mod Moderator VIP

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    i'd offer 6400
     
  10. Seany-izzle

    Seany-izzle New Member

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    i was thinking around that too, 6.4, 6.5k
     
  11. eg6sir

    eg6sir Supa Mod Moderator VIP

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    and i'd go with the GSR block.. not as pricey as an ITR

    i've actually been contemplating buying a GSR block and build it on the side
     
  12. Seany-izzle

    Seany-izzle New Member

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    true. the itr is only about 500 more though... but for driving around town i know i dont need the high end power. Which leads me to another option.. lol... ep3 with k24 long block swap... keep everything else stock :p


    or just get a wrx lol oh btw, the 99 si comes with studded hakkas, which run around 5-600 for a set.. which are needed here.
     
    Last edited: Feb 18, 2007
  13. Seany-izzle

    Seany-izzle New Member

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    so the usdm si ecu will run fine with the gsr and the butterflies??
     
  14. eg6sir

    eg6sir Supa Mod Moderator VIP

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    well, if you're just using a GSR block.. the SI ecu would be fine, since you would be running that head.. i'd throw some p30 pistons in there also
     
  15. AHHVTEC

    AHHVTEC Well-Known Member VIP

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    no if your running the complete gsr motor you need a diffrent ecu
     
  16. Seany-izzle

    Seany-izzle New Member

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    longblock. no block-head swapping. gsr block/head/manfolds, same with itr. maybe i should be clearer :p
     
  17. eg6sir

    eg6sir Supa Mod Moderator VIP

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    well, run whatever ecu is for that motor or a chipped p28
     
  18. Seany-izzle

    Seany-izzle New Member

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    k, i just needed to hear it again. Its been a while :p im more concerned about the tranny being a well suited trans for a gsr
     
  19. eg6sir

    eg6sir Supa Mod Moderator VIP

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    a GSR w/ b16 tranny will rip pretty hard..
     
  20. ThatGuy4life

    ThatGuy4life The Riced Sleeper

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    Hey there now, we forget too quickly on these boards. You're talking about my exact swap, minus all the work and building i've put into the motor. 2000 si with C5 swap using the si tranny cause I gave the type r tranny with lsd to my boy, harness and ecu. Also my P2T is up for grabs as soon as my P28 gets in hopefully this week.
     
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