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    #16
    You want the least amount of overbore possible. The machine shop will tell you what to get. Don't put the cart before the horse.

    Also, just a mention, bumping compression to try and make horsepower with crappy heads isn't likely to give you the results you want. Premium fuel, 11:1 compression, and heads that don't breathe are just going to make for something thats expensive to drive. You'd do better with good heads and 9:1 running off regular fuel
    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC grandpa spec white and cranberry

    1984 Lincoln Continental TurboDiesel - rolls coal

    Originally posted by phayzer5
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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      #17
      Not taking gasket volume into account .... cylinder volume is 568cc ..... so 568cc/58cc = 9.8:1 compression .... right? No, wait, it would be (568cc+58cc)/58cc = 10.8:1 .... though that would mean 9.4:1 with flattop pistons with no valve reliefs at zero deck ....

      guess that doesn't take into account the piston dish that produced the heads' original 8.3-8.5:1 CR, does it .... so (568 + 69 + dish) / (69 + dish) = 8.5 ..... meaning 637 + dish = 8.5 dish + 586.5 .... so 50.5 = 7.5 dish, or dish = 6.73 .... so I guess the original pistons for those heads would have had about a 6.73cc dish on them.
      Of course, its just simple math...

      i gotta tell ya, i couldnt read 1/3 of that without getting a headache lol
      ---1990 Lincon LSC., 5.0 H.O., 55,000 ORIG. miles, 3:73 Posi, Bullit rims, 3G alt., 2.5" full-back exhaust, Mark 8 elec. fan, Flowmaster mufflers. My DD
      ---1985 Grand Marquis 2-door., Fresh 5.0, slick-top, GT40P's, 1.7 RR's, FRPP headers, 3G alt., Weiand Stealth intake, 650 cfm holley, 2.5" side-exit exhaust, Mark 8 elec. fan, 3:55 Posi, Bucket seats, custom center console. My Toy

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        #18
        What are you looking to do with the car when its done?? Could you run a flat top piston??
        R.I.P Linsey Nelson

        '04 M75-"Chocolate Rain" - mid 13 beast
        Originally posted by MeanVic84
        Chocolate Rain. Some stay dry and others feel the pain.

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          #19
          my car is done. well the engine is till i get the moeny to add nitrous. ill have to change my transmission first though for a new new one.

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            #20
            Those D8OE heads came out in the 70's even worse the mid to late 70's when low compression ratios/and power numbers were the status quo. It would be better to get some GT40 heads or E7's..Those heads would flow way more and would bring the compression ratio you will want.

            If youve got the coin RHS makes some great low cost cast iron heads for the SBF.
            R.I.P Linsey Nelson

            '04 M75-"Chocolate Rain" - mid 13 beast
            Originally posted by MeanVic84
            Chocolate Rain. Some stay dry and others feel the pain.

            Comment

              #21
              Originally posted by import convert View Post
              my car is done. well the engine is till i get the moeny to add nitrous. ill have to change my transmission first though for a new new one.
              Will you be running a carb on this setup if yes then a NOS sniper kit should work perfectly for what your trying to do. Its a NOS quality kit with a dirt cheap price tag. I run the EFI version of the kit and I love it. As for the trans a Transgo shift kit and switching to a synthetic trans fluid will help you a bunch.
              Last edited by Grandmarchris; 09-26-2008, 12:52 AM.
              R.I.P Linsey Nelson

              '04 M75-"Chocolate Rain" - mid 13 beast
              Originally posted by MeanVic84
              Chocolate Rain. Some stay dry and others feel the pain.

              Comment

                #22
                Originally posted by Grandmarchris View Post
                Will you be running a carb on this setup if yes then a NOS sniper kit should work perfectly for what your trying to do. Its a NOS quality kit with a dirt cheap price tag. I run the EFI version of the kit and I love it. As for the trans a Transgo shift kit and switching to a synthetic trans fluid will help you a bunch.
                He said it's done. As in...done. As in...it's already running. You did notice that this was a four month old thread resurrected yesterday, right?

                2001 Ford Crown Victoria P71 - "The Fire Engine"
                1985 Lincoln Town Car Signature Series
                But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

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                  #23
                  i was looking at the hitman or sniper kits though but yea my parts list so far on my motor

                  holley 650 cfm carb single feed
                  edelbrock performer rpm manifold, dual plane
                  E7 heads
                  hooker headers
                  custom 2.5" duals and cheap 2" mufflers.

                  soon i hope to get a 3.27 or 3.55 posi and the nitrous kit

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