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Ross 84.5mm ring gap Help!!

Discussion in 'Engine Building' started by integramic, Apr 26, 2004.

  1. integramic

    integramic Member

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    Trying to put my engine together today after so many problems. Its a b18a and I had it sleeved. I bought custom ross pistons 84.5mm and it came with rings(I'm sure I paid for them for what I spent). I did a seach on here and came up with .020 for a gap on the first ring. I checked mine and am getting .032. The book (Haynes) says for stanard b20 its .0014 to .0024 which for 84mm. Plan on running up to 25psi. Had it bored .0045 over piston for gap. Pistons are 3.328 and the bore is 3.3325. I'll try to find out the brand the rings are.


    Talk to ross the other day and they thought the ring gap was too big also. So they ordered me a set of rings. When I got them the spec sheet I got with it said:
    Cyclinder is 84.5
    TOP Second Oil
    Street, strip, circle Bore x .0045 Bore x .0035 Min. .015
    Nitrous up to 150hp " .006 .0045 "
    Nitrous over 150hp .008 .0055 "
    Blown gas * .0055 .0035 "
    Blown Alcohol * .0045 .0035 "
    Blown Nitro * .0055 .0035 "

    * indicates any type of forced induction system


    Doing the math and: 84.5 .046 .30 or is it
    3.3325 .20 .10

    Does this sound right? Seems big??
     
  2. integramic

    integramic Member

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    Bump? Anyone?
     
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