Close

Results 1 to 10 of 10
  1. #1
    Registered User
    Join Date
    Jan 2011
    Location
    madison wi
    Posts
    2

    EP3 K20A2 engine swap******** HELP**********

    ok guys i have a 2003 honda civic ep3 and my stock engine is on almost 300,000 miles.
    I have a line on a k20a2 cheap and want the true facts on what i may need to complete the swap.
    I plan on using my 5speed for now to complete the swap, down the road i will be puchasing a 6 speed to mate with the new engine.

    I hear i can use the stock k20a2 ecu out of the rsx-s?? for now until kpro can be purchased.
    2nd from what i read the stock Ep3 engine harness will work, until i get the 6 speed then get the type s harness.?
    I can use my stock exhaust for now right??
    What intake and throttle body do you use? the k20a2 stuff correct??

    Any other issues i will run into????
    I want to do this swap very bad. Thanks for you input!

  2. #2
    Registered User chiwhitesi's Avatar
    Join Date
    May 2008
    Location
    Chicago
    Posts
    299
    yes you can use a k20a2 ecu (but please buy kpro you won't regret it)
    yes you can use the ep3 harness
    yes you can use your stock exhaust
    yes use the k20a2 plenum and tb

  3. #3
    BoostedK24a2 japarossa's Avatar
    Join Date
    Oct 2009
    Location
    Down the 1320
    Posts
    447
    Yes you can use the ECU out of the RSX you will just need to have the immobilizer programmed for the new ECU. The ep3 harness will work even when you get a 6 speed. You can get by using the stock exhaust for now. Yes you use the K20a2 intake and T.B., they are the same as the ones on the K20a3. Ideally you should have Kpro, I'm not sure how the stock RSX ECU will work with your stock 5 speed but people have done it. You will also need to remove the power steering pump from the K20a2 and put the Ep3 idler pulley in its place.

  4. #4
    Registered User chiwhitesi's Avatar
    Join Date
    May 2008
    Location
    Chicago
    Posts
    299
    Quote Originally Posted by japarossa View Post
    Yes you can use the ECU out of the RSX you will just need to have the immobilizer programmed for the new ECU. The ep3 harness will work even when you get a 6 speed. You can get by using the stock exhaust for now. Yes you use the K20a2 intake and T.B., they are the same as the ones on the K20a3. Ideally you should have Kpro, I'm not sure how the stock RSX ECU will work with your stock 5 speed but people have done it. You will also need to remove the power steering pump from the K20a2 and put the Ep3 idler pulley in its place.
    thanks for adding on to that for me

  5. #5
    BoostedK24a2 japarossa's Avatar
    Join Date
    Oct 2009
    Location
    Down the 1320
    Posts
    447
    Quote Originally Posted by chiwhitesi View Post
    thanks for adding on to that for me
    I was typing as you were posting lol smart ass

  6. #6
    Registered User
    Join Date
    Jan 2011
    Location
    Bay Area, Ca
    Posts
    20
    Quote Originally Posted by jdmjdp View Post
    ok guys i have a 2003 honda civic ep3 and my stock engine is on almost 300,000 miles.
    I have a line on a k20a2 cheap and want the true facts on what i may need to complete the swap.
    I plan on using my 5speed for now to complete the swap, down the road i will be puchasing a 6 speed to mate with the new engine.

    I hear i can use the stock k20a2 ecu out of the rsx-s?? for now until kpro can be purchased.
    2nd from what i read the stock Ep3 engine harness will work, until i get the 6 speed then get the type s harness.?
    I can use my stock exhaust for now right??
    What intake and throttle body do you use? the k20a2 stuff correct??

    Any other issues i will run into????
    I want to do this swap very bad. Thanks for you input!

    you can keep you ep3 harness when you get a 6 spd tranny. you will just need to run the reverse lock out seperately...

  7. #7
    Boosted EP3 !!! rolldogK20's Avatar
    Join Date
    Mar 2010
    Location
    Pomona, Ca
    Posts
    54
    Don't you have to use the A2 flywheel cause the A3 the dowell is differnt from the A2 if your to the 5 speed?

  8. #8
    ΜΟΛΩΝ ΛΑΒΕ talonXracer's Avatar
    Join Date
    Apr 2004
    Location
    Catskill Mtns
    Posts
    9,252
    Quote Originally Posted by dnrprojectsvp View Post
    you can keep you ep3 harness when you get a 6 spd tranny. you will just need to run the reverse lock out seperately...
    Still no need to use or even add the reverse lockout, if you accidentally hit reverse from 6th gear you should just throw the keys away and and just start walking.

    Quote Originally Posted by rolldogK20 View Post
    Don't you have to use the A2 flywheel cause the A3 the dowell is differnt from the A2 if your to the 5 speed?
    The only time you need to worry about this is when replacing the pressure plate, either the A3 or the A2 flywheel and pressure plate will bolt up and work fine, you just can not mix them together.
    ALL advice issued with this "Disclaimer"
    Tim "the Toolman" Taylor is my HERO ! ! !

    "Labor Unions are Domestic Terrorist orgainizations"

  9. #9
    Registered User
    Join Date
    Jan 2011
    Location
    madison wi
    Posts
    2
    ok guys got the engine ended up finding the
    mating 6 speed from the same guy!!
    How do you wire in reverse lock out??
    All this info is great by the way thanks to
    anyone and all who replie....

  10. #10
    I'm getting COOLER! 02TWSI's Avatar
    Join Date
    May 2008
    Location
    hacienda heights 626
    Posts
    1,451
    Reverse lockout isn't necessary.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •