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sohc vtec build

Discussion in 'Engine Building' started by K2e2vin, Oct 12, 2004.

which is better

  1. stock d15b2 block w/ d16y8 head and d16y8 gasket

    93.8%
  2. full d16y8 swap

    6.3%
  3. full jdm d15b vtec sw

    0 vote(s)
    0.0%
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  1. K2e2vin

    K2e2vin Senior Member

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    for all of them i plan on using p29 pistons, p28 ecu, and zex street/strip cams

    which build would be the best? im sort of limited on budget(not really lol) but want to know which has the most potential with bang for buck.
     
  2. beerbongskickass

    beerbongskickass Senior Member

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    I wouldn't go with the JDM d15b, for lack of parts and when my buddy's car broke ringlands in his d15b it was a pain in the ass (long story). He bought a used Y7 block (spun rod bearing), then a used Y8 block (spun rod bearing), so under further investigation he found out it's pretty common for those Y7/Y8 blocks. Just from helping him change out those bottom ends I can tell you I will never go with a Y block just incase lol. You could tell they were fucked on the first crank, but he though it was the valves, they both lasted about 5 minutes until they started knocking like a mofo. I wouldn't go with the d15b2 again because the lack of parts and a D16 would be a much better choice anyways. I guess that leaves you with a d16z6. :thumbsup:
     
  3. pissedoffsol

    pissedoffsol RETIRED

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    z6 block, y8 head, y8 tranny
     
  4. beerbongskickass

    beerbongskickass Senior Member

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    I defintely agree on the Y8 tranny, but why the Y8 head? I bet there wouldn't be much of a difference at all between the Z6/Y8 head, especially for an all motor car. I would just swap a Y8 intake manifold on the Z6 and call it a day.
     
  5. pissedoffsol

    pissedoffsol RETIRED

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    easy enough.

    the y8 head is SLIGHTLY better. if they can be had for the same price, go with the y8.

    z6 tranny's are garbage. i went through 3 on a pracitcally stock car between 90 and 140k (albeit, the send ones were used as well)

    the y8's insides are better built
     
  6. beerbongskickass

    beerbongskickass Senior Member

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  7. beerbongskickass

    beerbongskickass Senior Member

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    Do you have info or links? I believe on that sohchonda.com thread I posted they said Larry from endyn (very trustworthy) was the one saying the A6 head flows better then the Z6 in stock form. I have also heard from my buddy with a d15b that his head is pretty much the same as the Z6 head (he researched this), except of course as you mentioned the d15b cam is basically a ZEX 59300.
     
  8. BseriesKllR

    BseriesKllR Senior Member

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    the difference between the z6 head and the d15b head is only the cam as far as i know...and moose from the sohchonda site flow tested the heads and said the stock z6 actually flowed better then a ported y8 head....the only good thing about the y8 head is the combustion chambers are squared off.
     
  9. 4drcivicb18a

    4drcivicb18a Member

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    z6 bottom end, y8 head and y8 or 88-91 si trans best setup
     
  10. eghatch

    eghatch New Member

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    i have a 94 civic dx with a 98 dx motor (d16y7) and i want to throw vtec on it. Is this all i need to make it work......... z6 head, z6 dizzy, p28, i wanna go with the y8 IM, and hook up the vtec sileniod (i dont know how to spell), is that it?
     
  11. K2e2vin

    K2e2vin Senior Member

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    Heh, old thread man. Just start your own :p
     
  12. D15z6

    D15z6 New Member

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    Take my advice..

    ok first of all for those who said if you use the d15 bottem end isnt a good choice.. your wrong. lemme explain..

    in my personal opinion..
    i did this swap last month and dyno'd it also..

    d16z6 head
    d15b7 short block
    with pm3 pistons
    oem rods
    75mm bore
    84.5mm stroke

    9.2 c/r with stock head..

    but after take my sweet time and removing the oil jet resistor and re torqueing v/t in my head.. and making sure all my valve adj were to spec. replacing the fuel pump and belts etc etc... and so on.. i did a compression check.. my mini me was read at 9.8:1 c/r.. know that the z6 has only 34.60 cc per cyl in the heads spec i was better off than the stock z6 9.2:1.. more comp ment more power right? yes to a certain extent.. after my dyno run i only was pushing 115bhp versus the stock z6 125bhp (bhp" doesn't mean block horse power for some of you undergraduates out there it means Brake horse power") now your thinking this guys dumb invested all that time for 9 bhp gain when he could of got a swap and pushed the full 125-127bhp... eerrrhhhgg!! wrong. heres what i gained.. 9bhp plus the aditional 8 ft-lbs of torque.. now for all you d series fans out there .. everyone knows what gets going when the going gets tuff.. TORQUE.. how are you gonna tell me a block that has less weight and the same amount of torque as d16z6 and 10 less horsepower is gonna be a loss... hp matters only when high end.. being the 1/4 is gonna end in your 3rd gear.. torgue is gonna make sure you pull right next to that d16y8 in that run.. not saying your going to beat himm.. looks like a close tie to me... though if your not smart and you didnt tune ure car like me your not going to get the result you want...

    any question at all on d series talk to me.. if not im out bye!!
     
  13. formby

    formby learning in progress

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    some one lock this shit
     
  14. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    most definitely...what the hell are you thinking.
     
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