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b20 vtec

Discussion in 'Integra' started by jdmloc, Aug 9, 2007.

  1. jdmloc

    jdmloc New Member

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    i am doing a b20 vtec engine in my da
    and was wondering
    how or where do you get your block resleeved?

    and i was reading this on a b20 vtec engine as i want to build it

    "You should avoid advancing the intake cam much as contact will occur between the piston and valves if the cam is advanced much more than 4 degrees. In fact this is so close, it is not really advisable to advance the intake cam at all.

    If running larger lift and duration aftermarket cams in your B20/VTEC Frank, or if the head has been modified for higher compression by milling, the piston's valve pockets should be modified and the valve-to-piston clearance confirmed with clay before the head is final assembled to the block. Additional clearance can be obtained by careful grinding the pistons valve reliefs with a die-grinder with carbide burrs and polishing the result with cartridge rolls. A minimum clearance of 0.045" on the intake valves and 0.055 on the exhaust valve is advisable."


    can someone explain to me how to do this also as i want aftermarket cams and such?

    thanks guys
     
  2. formby

    formby learning in progress

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    since you need help on this i would do the following

    1 buy everything [block, head, cams]

    2. find a reputablke machine shop

    3. have them plastiguage the clearances and they will remove as much material as possible

    or buy these
    [​IMG]
     
  3. jdmloc

    jdmloc New Member

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    ya i know how to get pistons and shit like that
    i am just worred about the cams because i want aftermarket ones and in the quote i said it says their could be a problem with that because the valves and pistons will have contact
    here it is

    i just want somebody to explain this to me and what i can do to fix that

    "You should avoid advancing the intake cam much as contact will occur between the piston and valves if the cam is advanced much more than 4 degrees. In fact this is so close, it is not really advisable to advance the intake cam at all.

    If running larger lift and duration aftermarket cams in your B20/VTEC Frank, or if the head has been modified for higher compression by milling, the piston's valve pockets should be modified and the valve-to-piston clearance confirmed with clay before the head is final assembled to the block. Additional clearance can be obtained by careful grinding the pistons valve reliefs with a die-grinder with carbide burrs and polishing the result with cartridge rolls. A minimum clearance of 0.045" on the intake valves and 0.055 on the exhaust valve is advisable."

    thanks again
     
  4. formby

    formby learning in progress

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    dont you read....
    #3 in my post thats what you need to do

    THEY PLASTIC GAUGE THE PISTON AND VALVE CLEARANCES. THEN THEY REMOVE MATERIAL FROM PISTON TO MAKE IT FIT
     
  5. jdmloc

    jdmloc New Member

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    oh sorry man

    thanks for the info
     
  6. jdmloc

    jdmloc New Member

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    so your saying if i get the pistons from rs machines
    they i wont have to go to a machine shop and get it plasticgauged?
     
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