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nos with pr3 pistons in b18

Discussion in 'Forced Induction' started by competitiveaudioman, Aug 21, 2007.

  1. competitiveaudioman

    competitiveaudioman New Member

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    nitrous with pr3 pistons in b18

    i got a b18b with the b16 pr3 pistons in it and i was wondering if i could put a 50 shot wet nos kit on it relibly? the bottom end is stock but with a block guard. i got arp head studs with a fully rebuilt head. is this too much to ask outa that set up?
     
    Last edited: Aug 21, 2007
  2. civicious

    civicious FüK-VTEC VIP

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    Nitrous on OEM pistons can only be reliable for so long; it's just a matter of time before you melt a piston. If you want reliability, get forged pistons.
     
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  3. competitiveaudioman

    competitiveaudioman New Member

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    ok. would i have a problem with my current 11.2.1 comperesion and nos? i was thinking that would be to high
     
  4. civicious

    civicious FüK-VTEC VIP

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    Nitrous loves high compression. The only time your compression is too high with nitrous is when the valves hit the pistons. The only problem you're going to run into with your current setup is that your pistons aren't strong enough.
     
  5. competitiveaudioman

    competitiveaudioman New Member

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    even for a 50 shot? if not would my stock rods be alright? what if i took it back to stock b18b compresion wit the stock pistons? would i still hav the melting problem with a 50 to 100 shot? im new to nitrous
     
    Last edited: Aug 21, 2007
  6. civicious

    civicious FüK-VTEC VIP

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    Hello, welcome to my first post in this thread.

     
  7. competitiveaudioman

    competitiveaudioman New Member

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    yeah i read it but i didnt think a 50 shot would destroy a piston. like i sayd im NEW to nitrous. what pistons would you recomend? (brand)
     
  8. civicious

    civicious FüK-VTEC VIP

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    Any amount of nitrous, over time, will destroy a cast (oem) piston. Some good brands to go with would be Wiseco, CP, or SRP. Pistons aren't exactly cheap, but they pay for themselves in reliability. It would also be a good idea to throw in a set of forged rods as well, from a reputable company such as Eagle, Crower, or Carrillo.
     
  9. competitiveaudioman

    competitiveaudioman New Member

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    ok. should i leave it at the compresion im at now? (11.2.1) now would be a good time to change it if need be
     
  10. civicious

    civicious FüK-VTEC VIP

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    If you're planning on spraying it (which you are), I'd go ahead and get pistons that would put you at LEAST around 12.5:1 and get your car re-tuned with the nitrous. Like I said, nitrous LOVES high compression, the higher the better.
     
  11. competitiveaudioman

    competitiveaudioman New Member

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    if i ran that high of compresion would i need to upgrade anything els? i got arp head studs but would that hold it? what bout my starter would it turn over? i gues im usd to sbc engines and that just seems way high
     
  12. civicious

    civicious FüK-VTEC VIP

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    I've run as high as 13.5:1 in the past with no problems... the ARP's will do just fine, as will your oem starter.
     
  13. competitiveaudioman

    competitiveaudioman New Member

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    ok cool. what bout cams? my oem work fine? what bout my cylinder walls..i got a blox block gaurd but is that enough?
     
  14. civicious

    civicious FüK-VTEC VIP

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    A block guard will be sufficient, just make sure you hone the cylinders after installing it to ensure that they aren't out-of-round. Your OEM cams will be ok, however youll make more power with aftermarket cams. If you've got the budget, go for it.
     
  15. competitiveaudioman

    competitiveaudioman New Member

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    ok thanx. with the forged pistons and hbeam rods, what kinda nitrous levels could i put thew that? like whats the biggest shot?
     
  16. civicious

    civicious FüK-VTEC VIP

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    It all depends on your fuel system and your tune. If you're running your stock fuel pump I wouldn't throw more than a 75 shot at it.
     
  17. competitiveaudioman

    competitiveaudioman New Member

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    i was planing on picking up a wabro 255 fb, run a regulator, and get a chiped ecu. you think all that would get me to a 100 shot? also if i did a 100 shot what would be a ball park hp would i be around when im using the nitrous?
     
  18. formby

    formby learning in progress

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    i'm in the process of using an 80hp wet shot on my lsv.

    cast ls pistons w/ block guard. 9.8: CR

    i would not run anything over 80 shot through a single fogger set up. at a 100 shot you should go searching into direct port set ups.

    i have used a 100 shot through my current set up [at the track] but i dont want to invest in a direct port system so 80 is all i would run.
     
  19. competitiveaudioman

    competitiveaudioman New Member

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    ok so ill stick with a 75 shot for now. now being that im new to nitrous what would the comperison be btw a turbo pull and a nitrous pull? can you feel the difference when you hit that button or actavate the switch?
     
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  20. formby

    formby learning in progress

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    yeah you feel it...


    start with the lowest pills and work up tothe shot desired.

    with aa 75 shot you should be ok with a stock plug and a retard on 2-3 deg.

    but some might say to get a step colder plug.

    buy both and see if the cold plug stays dirty.

    to check plugs:

    take your tools
    find a long no traffic rd
    do a full throttle pull through 4th gear
    press clutch and turn off engine immediately roll to a safe place
    check plugs.

    if the plug is too cold youll see sut /carbon on the ceramic

    if its too hot it will look cleaner but the ceramic will have peppering
     
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