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LS frank motor

Discussion in 'HYBRID -> ED-EF / DA' started by cbr1, Feb 15, 2005.

  1. cbr1

    cbr1 Junior Member

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    I have a 90 civic si hatch EF.

    I have read about frank motors where one can swap out with a ls motor vtec head.
    Is it possible for my EF and would it be difficult to do (will i need a tranny swap)?
    what else will i need to swap out

    read below about the frankenstein engine. b18b with a head from a b18c or b16a
    http://www.hondatuningmagazine.com/tech/0203ht_killerb/
     
  2. jlicrx

    jlicrx Senior Member

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    yes, one of the guys at our shop has LS/VTEC in his 91 Si hatch - B18A1 block and B16A head - you will need a b-series transmission, mount kit, intermediate shaft and axles, shift linkage, ECU and exhaust work (header,etc.) - also a little wiring
     
  3. projectxspeed

    projectxspeed Senior Member

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    The work you are looking into is commonly referred to as LS/vtec. It is a very easy setup. You start buy searching this site for that topic. There has been a lot of write ups on it. Here is a basic parts list to get you started.

    - Vtec Head (b16a or b18c)
    - LS block (b18a or b18b, you could get fancy and get a b20z)
    - CABLE transmission (your si will not work, you can get a hydro but then you
    need an adapter kit too)
    - Vtec ECU (this depends on what obd you want to run)
    - Motor mounts
     
  4. david_jones001

    david_jones001 Senior Member

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    if u can afford it and do it right, its a sweet setup, i have one in my 91 civic hatch, fucking hood wont fit down tho,
     
  5. cbr1

    cbr1 Junior Member

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    thanks guys.

    I wasnt planning to spend too much on it, and i plan to use generic parts, aside from engine) to put it together.
    what do you think is the estimated cost if i were to do this swap without labor

    cable tranny + cheaper vtec head (b16a or b18c?) +
    cheaper ls block (b18a or b18b?) + vtec ecu + motor mounts

    i am looking at cost, but from your experiences, i want to know if i have the budget to do it.
     
  6. david_jones001

    david_jones001 Senior Member

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    If i where u, i whouldnt do a lsvtec without repalcing the rods and pisotns, atleast get urself some ctr pistons and some APR rod bolts, or that bottom end wont last that long unless u build it up some, im in the process of building a whole new lsvtec, ITR head, Skunk2 valvetrain,, Skunk2 stage 2 cams, eagle rods, apr rod bolts, je pistons, all new bearings, , so it depends on how in depth u wanna get, but remeber the cheaper the less reliable
    If i where u, id go iwth a b18a1 block, they are a little cheaper, and a b16 head, they are cheaper then a gsr head, get some rod bolts for 30 bucks, and get some ctr pistons, and make sure u replace the water pump and oil pump with either gsr, b16 or itr pumps. and replace as many gaskets and seals that u can afford
     
  7. redef91

    redef91 Senior Member

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    david how much u spent on ur whole ls/vtec setup i have a 1991 crx si and money is quite tight but i just got a whole 1991 gs teg for 700 with 100000 miles and runs strong. i want my rex to be fast but i want reliabliaty as well cuz i will be useing the rex to go to work. any suggestion guys. i was leaning towards the ls/vtec but sounds kinda expensive but what i researched can be not so reliable.
     
  8. SlushboxTeggy

    SlushboxTeggy It's only stupid if it doesn't work VIP

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    if your not already starting with a ls motor in your car, i would get a complete ls swap. that way you have a running motor in your car while you get all the other parts together. search pissedoffsol's topics for ls/vtec assembly. he did two really good write ups about it.
     
  9. david_jones001

    david_jones001 Senior Member

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    Gsr head: 800
    B18a1 Bottom: 200
    B16 cable tranny 350
    Stage 3 clutch: 200
    Crower Pistons and ROds: 800
    All new seals and gaskets: 130
    Gsr Oil pump: 90
    Gsr water pump: 100
    Timing Belt: 25
    Mounts: 350
    Linkage:20 bucks for 91 acura integra plus cutting the ends off and weliding a longer linkage
    OBD0 to OBD1 Coverstion harness: 200
    GSR eCu : 100
    ITR Header: 120.00
    Skunk 2 Manifold: 200
    As u can see it gets quite expenisve, but it is WELL worth it
     
  10. david_jones001

    david_jones001 Senior Member

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    About it being reliable, It Can And WILL be just as relibale as a stock honda engine as long as it is done right. If u just slap a head on a ls bottom, that is not gonna be reliable, before i did mine i reacherd for 1 year, I have been druving mine for 35000, only probelm i have had is had to replace a oil line, thats it,
     
  11. redef91

    redef91 Senior Member

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    thanx guys i bought the gs teg so ill need is all those other parts. ill do it slow and right. u guys think the ls/vtec is betta than the ls/turbo or no. and u didnt machine anything for ur ls/vtec setup.
     
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