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ls/vtec

Discussion in 'HYBRID -> EG-EK / DC' started by blick2319, Nov 30, 2003.

  1. blick2319

    blick2319 Junior Member

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    i"M building an ls/vtec i have a 90 ls bottom wth a 2000 gsr head. I want to get new rods and pistons. What the highest compression i can run on reg. 87 pump gas. Also what rod and piston combo will give me this compression thanks.
     
  2. B16

    B16 Super Moderator VIP

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    on 87 pump gas? i guess like 9.5:1 - 10:1? why 87? that cannot be the best gas you have there. use your stock rods and pistons
     
  3. blick2319

    blick2319 Junior Member

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    I heard that ls pistons can't hanlde the high rpm of the gsr though is that true?
     
  4. Bl6CRX

    Bl6CRX Senior Member

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    there is no pistons that would be worth doing with a cr low enough for 87, i would never even run a stock b16 or gsr on 87 let alone anything built, on 91 you could go up to 12:5:1 with proper tunning, but a nice spot so you don't have to retard the timming to much is about 11:5...
     
  5. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    :withstupid:




    :withstupid:


    89 is only about $.10 more per galon ($1.00 more per tank) than 87
    91 or 93 is generally only $.15 - $.20 more per gallon ($1.50 - $2.00 more per tank) than 87

    is that really that big of a deal???????
     
  6. lsvtec

    lsvtec GNU/Linux Evangelist

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    This is not true.
     
  7. EJdmB18C

    EJdmB18C Member

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    87 Octane is TOO cheap for better pistons or rods...If you treat your motor good...YOUR MOTOR WILL TREAT YOU GOOD... :)
     
  8. blick2319

    blick2319 Junior Member

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    ok so i'll run better octane. but i would still like to know what piston and rods i should run to get a good tunable compression in a 90 ls bottom with a 2000 gsr head. I dont' knwo how to calulate that he compression will be.
    thankyou for your info though and please help me asap if u can answer this!
     
  9. mwasnp

    mwasnp Senior Member

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    I would run civic type r pistons. I believe this will get you in the mid 12's:1 cr.
     
  10. blick2319

    blick2319 Junior Member

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    thanks and what rods? should i just use stock ls with arp bolts. I wasn't going to replace them but i dunno what kind of condition they r in and i dunno how much it would cost to see what condition they in by a shop so i thought maybe it would be cheaper to just buy new ones. Please tell me what u think
     
  11. EJdmB18C

    EJdmB18C Member

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    Its better to replace them...but will cost a grip...
     
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