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ls vtec build I need help

Discussion in 'Engine Building' started by 90AccordH22, Aug 19, 2005.

  1. 90AccordH22

    90AccordH22 Member

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    Whats up everybody I just bought an LS for my ef and I want to do ls/vtec with a hint of N/A My first question is I want to use ITR pistons what's the best rod to use, second of all the if I do use the ITR pistons what bushings and pins and all the conecting junk do I use the LS or type R third of all will I have enough valve clearence to us the LS head with the type R pistons till my B16 head is done from the machine shop and last what timing belt and oil pump do I use? I've only messed with H series motors so yell any anwser out or ideas is appreciated because B series are new to me.
     
  2. 94CivicSlow

    94CivicSlow Senior Member

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    Pretty sure the ITR pistons have to be pressed on to LS rods at a machine shop, also use ARP rod bolts. ITR pistons will clear the LS head. Use a GSR OBDII Waterpump, Timing belt, and oil pump when you decide to throw the vtec head on. You will need the golden eagle conversion kit also.
     
  3. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Damn I didn't think the ITR pistons would work with the LS motor???? Learn something new everyday here that's why I love HS. I say go with some CTR pistons with the Golden Eagle kit and use a Type-R oil pump and Type-R water pump that's what I got.
    Oh I also ran the GSR oil pan for some reason but the LS will work just fine. If you want I have some CTR pistons brand new never used with rings and everything ready to go into an LS block for $250 (SHAMELESS PLUG). They will raise your compression ratio to somewhere around 11.8:1.
     
  4. hybrid89

    hybrid89 thistownsucks...

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    are these my old/new pistons by chance!
     
  5. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    That's an affirmative Matt. I ended up not using them and sold them to my friend and my friend gave them back to me before he paid for them fucking Shadney.
     
  6. hybrid89

    hybrid89 thistownsucks...

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    hahaha...shit gets around!
     
  7. 97CTR

    97CTR Senior Member

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    b16 and ls block with ctr pistons = comp. ratio of 12.7:1. Itr's are definately a better choice, P30's would also do you good as well.
     
  8. 90AccordH22

    90AccordH22 Member

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    I all ready have the ITR pistons so thats what I'm going to use for sure and from what I've figured out I'm going to use the B18A rods but I think I'm going to order some H beams for the LS the only thing I'm woried about is conecting the pistons to the rods. I haven't really got a clear anwser on that but I'm doing a B16 head with 99 Si cams I'm also going to have the head reworked a little and a B17 tranny. It should be pretty fun.
     
  9. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Sounds like fun good luck with your build mang.
     
  10. 97CTR

    97CTR Senior Member

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    if you do end up getting aftermarket rods, you will need to have your itr pistons machined for spiral locks. Also if you go with the LS rods, I think that you need to have them machined down in order to fit into the itrs smaller opening in between the piston skirts. Get ARP bolts if you keep the LS's too.
     
  11. 90AccordH22

    90AccordH22 Member

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    If I use CTR pistons do they need machined to fit the ls rods?
     
  12. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    That's a negative that's why I got them but never used them cuz I got lazy.
    They are good to go right on. Enjoy your build it sounds like it's going to be a beast.
     
  13. 90AccordH22

    90AccordH22 Member

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    thanks for the reply I'll keep everyone posted!
     
  14. brian11to1

    brian11to1 Senior Member

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    How did you come up with that number? If you used C-speedracings compression calculator, that is an incorrect compression #.

    Whats the difference between OBD1 and OBD2 GSR water pumps? Fuck the GSR pumps use ITR. I bet they are better.
     
  15. 97CTR

    97CTR Senior Member

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    All you want to know about CTR comp ratio and more


    Basically with the c speed calculator they don't account for the ctr compression height. Because they don't sit in cylinder they are actually about flush with the top of the cylinder.


    I got that compression number from Omniman on HT. He is the guy that made the first Ls/Vtec so he knows his ish.
     
  16. sohcslammer

    sohcslammer Senior Member

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    :yes:

    You WILL need to notch the LS rods to fit those pistons on them.

    I can't believe you guys don't know this shit by know.
     
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