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Will everything be clear

Discussion in 'Engine Building' started by jimboburgess, Feb 21, 2006.

  1. jimboburgess

    jimboburgess Go fast, Go Cheap

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    b18b1 block, b18b1 head, b16a1 rods, P72-A0 gsr pistons should yield 10.0:1 compression ratio with a 2 ply head gasket. will everything clear? and what could be the expected gains from this. on a stock engine?
     
  2. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

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    umm your looking at like 8:1 compression. not 10:1. b16 rods are 3mm shorter then LS rods. but yea everything will clear....
     
  3. 97CTR

    97CTR Senior Member

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    yeah, lets just say thats a negative on using b16 rods in an ls
     
  4. jimboburgess

    jimboburgess Go fast, Go Cheap

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    yeah, alright, no need to lessen compression, LS rods and Gsr rods are the same length? just connect differently?

    And do i shave my LS rods to make the GSr pistons fit, or can i buy GSr rods and fit those to my crank?
     
  5. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

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    yes you will have to shave the LS rods to fit the GSR pistons. and no, GSR rods are longer then LS rods.

    and youre looking at 10.2:1 with that setup

    also just so you know, this compression calculator is much better then the c-speed one.

    http://www.zealautowerks.com best one ive found.
     
  6. nfn15037

    nfn15037 Senior Member

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    No, LS rods are shorter due to the longer stroke of the LS crank. Use rods that match your crank unless you are going with some weird pistons that have reised wrist pins. GSR rods with an LS crank = pistons smashing into head.
     
  7. jimboburgess

    jimboburgess Go fast, Go Cheap

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    using the compression calculator, i found that the pistons and rod combo would stick out of the hole 0.024 inchs so yeah, that's for saying that i was actually just about to ask how much clearance i would have, now i know, thanks.

    i will go with LS crank, gsr pistons, LS rods, 2 ply head gasket and that should yield 10.2:1 compression
     
  8. pissedoffsol

    pissedoffsol RETIRED

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    jdm b16 pistons-- p30
    ls everyting else. bolts on.
    11:1
    done
     
  9. jimboburgess

    jimboburgess Go fast, Go Cheap

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    one problem, T3 Turbo. . .




    it's already a turbo engine, with a 14b and i just ordered a t3 to stick on there. I want a boost in compression but 11:1 would be too difficult and require too much money and work.

    i will need to machine the rods to get the pistons to work, so i was thinking to save just get a thinner head gasket, and place it on before i tune. just get a tiny boost in compression.

    From what i was reading 9.5:1 seems to be about tops on a DD turbo app.

    so with a i could go about 9.3:1 with a double ply headgasket and later go ls/vtec on top once i complie the parts/money/time to do that completely
     
  10. pissedoffsol

    pissedoffsol RETIRED

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    ok then,
    usdm b16 pr3's
    double thick headgasket.

    that will put you right around 10:1
     
  11. jimboburgess

    jimboburgess Go fast, Go Cheap

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    it's true that with higher compression the turbo makes more power as well?

    where could i find a double thick headgasket
     
  12. pissedoffsol

    pissedoffsol RETIRED

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