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Dx To Si Conversion

Discussion in 'HYBRID -> ED-EF / DA' started by guitaruser, Jun 13, 2003.

  1. guitaruser

    guitaruser Junior Member

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    I have a 1990 CRX , DX with a 1.5L , with automatic tranny. I am installing a 1.6L Si engine. Could I still use the Automatic Tranny in this setup? Which ECU do I need ? Do I need to convert from DPFI to MPFI ? Or could I just use the intake sytem from the 1.5L ?
     
  2. jlicrx

    jlicrx Senior Member

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    yes, you can use the automatic - if you do DPFI to MPFI swap, use 88-89 integra automatic ECU - you could use the DX intake, in which case, use your ECU and distributor
     
  3. Jeef

    Jeef NO MA'AM Moderator VIP

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    Use an ecu from an auto 90-91 civic ex. It uses the 1.6l and is the proper ecu for the engine so you wont be running rich.
     
  4. RENR

    RENR Senior Member

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    im considering this swap soon. if i change the ecu, will i stillhave to do all the rewireing, and changing of the pin locations like in this article swap??? or can i just use the stock auto ecu until i find a acura ecu?? please help! thanks
     
  5. hcivic.com

    hcivic.com Senior Member

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    do a search on this subject i posted an entire page with a detaled list of parts and crap
     
  6. RENR

    RENR Senior Member

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    i did a search and ended up here. got a link?
     
  7. hcivic.com

    hcivic.com Senior Member

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  8. RENR

    RENR Senior Member

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    cool thanks. i got another question though. im changeing the entire motor not just the intake portion. on that list it talks about changin wires on the distributor(condidering that youll be using the dx distributor, right?) what do i have to do if im going to use the si distributor??
     
  9. hcivic.com

    hcivic.com Senior Member

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    that liast is using the si dist if you use the dx and the dx intake you need not change any wires

    USE THE SI TOP END the dpfi sucks ass as does the drive train buy using the si you will gain more power
     
  10. RENR

    RENR Senior Member

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    ya were gona swap the entire motor and topend. thanks youve been helpful. were would i be without hondaswap!
     
  11. RENR

    RENR Senior Member

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    well it isnt my car so im not gona be changing the tranny. im just concerned if i can still use the stock auto ecu. thanks guys
     
  12. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    If you're staying automatic, you need an automatic ECU. You could stay DPFI if you really want to, but that basically negates all the advavtages of using the Si engine other than gaining 97cc of displacement. You would have to use the old intake manifold for the DPFI setup and DPFI ECU.

    If you want to convert to MPFI, you might want to try and use the 90-91 EX automatic ECU. It's matched to the D16A6 since that's what the EX had, and it can control an automatic transmission.
     
  13. RENR

    RENR Senior Member

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    so if i use the 90-91 ecu, will i still have to change all those wires? i really want to know if its necesarry. can i still just use the dx ecu and then just upgrade later on?
     
  14. Jeef

    Jeef NO MA'AM Moderator VIP

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    A dx ecu can only control the dpfi. You need an ex auto ecu to control your setup. I think its the pm6 that you need.
     
  15. honda1.8ac

    honda1.8ac Member

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    i am doing a similar swap with my car...i am going from a DPFI to a MPFI, and i was wondering if i need to change the ECU and the wiring harness, or if i only need to change one or the other. if you could help me out that would be great,
     
  16. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Both. A DPFI ECU can't run an MPFI system. You need to add the wires so that the extra injectors can be run in the first place, then you need to add the brain that can control those extra injectors.
     
  17. RENR

    RENR Senior Member

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    WELL we got most of the swap done today. but we ran into a problem. the auto dx eingine has two cable at the throttle body. one cable is the throttle cable and the second is a cable similar to the throttle cable but that goes to the auto tranny. since the engine is froma manual i cant attach the cable going to the tranny. so dam im stuck right now unless i can figure out what to do. deam. :( ( oh an di did end up using the 89 teggy ecu. got it at teh junk for 20 bux.) ;)
     
  18. sinfulcivic

    sinfulcivic Junior Member

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    :eek: ok i need some help from some of you experienced people, im switching from dpfi to mpfi and am having trouble with one of the steps i got from a list of instuctions. i need to know exactly what or how to relocate the ecu pins, and what exactly the ecu pins are. if any of you guys out there can help me, i would be very happy!
     
  19. Jeef

    Jeef NO MA'AM Moderator VIP

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    Start your own thread.
     
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