Announcement

Collapse
No announcement yet.

which cam is better ???

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    which cam is better ???

    would any of you know the real difference between the roller cam and the flat tappet cam. would the roller cam make more power because of less friction, and arent the lobes on the roller cam bigger than a flat tappet... i finally got enough money to buy a cam and just wanna know which would be my best buy, thanks 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
    Tags: None
    #2
    Originally posted by Bowman85merc View Post
    would any of you know the real difference between the roller cam and the flat tappet cam. would the roller cam make more power because of less friction, and arent the lobes on the roller cam bigger than a flat tappet... i finally got enough money to buy a cam and just wanna know which would be my best buy, thanks lol
    Go roller. If you are ever able to compare the two cams side by side, you will notice that the roller cam keeps the valve open a hell of a lot longer than the flat tappet stick. The flat tappet can only have so much lift and ramp angle before it tries to snap the lifter out of the block from the side. Roller cams? Hell, you can run and easy .700" of lift before you really have to start worrying about anything.

    Comment

      #3
      Roller cams have much more agressive ramp rates and keep the valve open longer. Its a more efficient system for that, plus the reduced friction doesn't hurt any.

      Just a note though, the 85 block more than likely isn't roller cam compatible. You may have one that just needs the holes drilled and the hardware added, but you might not. The block casting code on the side should tell you.
      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

      Comment

        #4
        Only problem is, mang, your block is not roller compatable, unless you do an expensive retrofit.

        Otherwise, you could do a roller bottom end (86-up) and easily use some of the numerous offerings from comp cams, trickflow, crane, or *gasp* the ford letter cams.
        1983 Grand Marquis 2Dr Sedan "Mercules"
        Tremec TKO conversion, hydraulic clutch, HURST equipped!

        Comment

          #5
          Most, if not all, 85 passenger car 302 blocks ARE roller hydraulic compatible.

          Every 85 block I have taken apart and several I have seen taken apart were.
          2003 Town Car Signature - 3.27 RAR, Dual exhaust and J-mod - SOLD 9/2011
          89 Crown Victoria LX HPP -- SOLD 9/2010
          88 Grand Marquis LS - The Original -- Totaled 5/2006

          I rebuild AOD/AODE/4R70W/4R75E transmissions....Check out my Facebook page: https://www.facebook.com/pages/North...48414635312478

          Comment

            #6
            mine is roller compatible. it has the holes to bolt down the lifter bracket or what ever that is. would i be able to use the roller lifters and push-rods i pulled out of the exploder, or would i need different rods and lifters
            ---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

            Comment

              #7
              you can use Exploder parts then. Make sure you get the retainers and the spider too.
              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

              Comment

                #8
                Originally posted by gadget73 View Post
                you can use Exploder parts then. Make sure you get the retainers and the spider too.
                in case it wasn't mentioned....get new valve springs.

                Comment

                  #9
                  Because it wasn't mentioned enough... get new valve springs.
                  2011 Mustang GT Premium, MT82, Kona/Saddle, HIDs, 3.73s, 19s, hood/side stripes, UPR 1.5" springs with adjustable panhard bar, and UMI solid LCAs and relocation brackets.
                  1992 Explorer Eddie Bauer, slight lift, 34s, and A/C...
                  1979 Bronco Custom, 351M/C6/NP205, 4" lift, 35s, lots of fender trimming.

                  Comment

                    #10
                    Get new valve springs, by the way.

                    It's a royal BITCH swapping valve springs with the heads in the car. You have to dismantle the passenger side accessories and you have to completely remove the windshield wiper box just to get that task accomplished three days after you first run it halfway hard because you realized the stock Explorer springs blow.
                    2011 Mustang GT Premium, MT82, Kona/Saddle, HIDs, 3.73s, 19s, hood/side stripes, UPR 1.5" springs with adjustable panhard bar, and UMI solid LCAs and relocation brackets.
                    1992 Explorer Eddie Bauer, slight lift, 34s, and A/C...
                    1979 Bronco Custom, 351M/C6/NP205, 4" lift, 35s, lots of fender trimming.

                    Comment

                    Previous template Next
                    Working...
                    X