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cheap 1.7 rocker arms

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    #1

    cheap 1.7 rocker arms

    this past week, I replaced the head gaskets on the neighbor's 88 cougar with a 3.8L V6 engine. During disassembley, I noticed the rocker arms looked different. A quick comparison with a stock 5.0L rocker arm and the 3.8L rocker arm is longer and if memory serves corretly they are 1.72 ratio rockers.
    So, if you want cheap, factory style rocker arms, find a 3.8L V6 at the local yard and yank the rocker arms off it.

    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
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    #2
    cool will try it!

    1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
    2006 Lincoln Town Car Signature. Stock for now
    1989 Ford F-250 4x4 much much more to come, sefi converted so far.
    1986 Toyota pickup with LSC wheels and 225/60/16 tires.
    2008 Hyundai Elantra future Revcon toad
    1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

    please be patient, rebuilding an empire!

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      #3
      Interesting..
      1983 Grand Marquis 2Dr Sedan "Mercules"
      Tremec TKO conversion, hydraulic clutch, HURST equipped!

      Comment

        #4
        I'm goint to the junkyard today for plastic trip pieces for my seats, now I know what else to get

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          #5
          Mercracer said over on CVN that the geometry doesn't look right...

          and he knows everything there is to know about Ford, so how about someone do the measurements before anyone tries this?
          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.

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            #6
            I have to agree, it doesn't look like the 1.7 rockers are hitting the valve in the correct place. Usually you increase the ratio by moving the fulcrum back as well.

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              #7
              I am not sure how you would move the fulcrum back when the rocker arms bolt down in a fixed position and the distance to the valve is the same. The Ford/Crane rockers for the 93-95 Cobra motors are 1.7 ratio and they seem to work.
              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

                #8
                93-95 cobra rockers are crane rollers. With any rocker you can move the bolt hole in the rocker to move the fulcrum. the bolt just detirmines where it his held down. The center of the rocking point is the ratio detirmination. instead of drilling the hole for the bolt in the center, just drill the hole a little closer to the push rod. Obviously this isn't something you actually do, but that is the concept used. Making a longer rocker will cause it to overshoot the valves.
                Last edited by Blaze86Vic; 08-12-2006, 11:03 AM.

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                  #9
                  yes, I know they are roller rockers. who wants to offer some 1.7 crane rockers for a comparison?
                  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

                    #10
                    use GMGTs rockers as the comparison. I would offer mine but, the damn valve covers are a bitch to get off because I have to remove my intake.

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                      #11
                      Just remember to grab 4 extra ones off another car!
                      Builder/Owner of Badass Panther Wagons

                      Busy maintaining a fleet of Fords

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                        #12
                        Originally posted by Blaze86Vic
                        use GMGTs rockers as the comparison. I would offer mine but, the damn valve covers are a bitch to get off because I have to remove my intake.
                        Why do we gotta use mine?

                        Ok, fine..

                        You could probably get to mine in about 5 minutes...Scott?
                        1983 Grand Marquis 2Dr Sedan "Mercules"
                        Tremec TKO conversion, hydraulic clutch, HURST equipped!

                        Comment

                          #13
                          Originally posted by 88grandmarq
                          The Ford/Crane rockers for the 93-95 Cobra motors are 1.7 ratio and they seem to work.
                          They are designed for a 302/351W geometry. They will not work on a 351C/429 because they are too short from the stud to the valve. If they were interchangable, then we would not have 2 different part numbers. BB Chevy are interchangable with 351C/429 but they are 1.7 instead of 1.72 like the Fords. BB Chevy are not interchangable with a 302/351W.

                          Comment

                            #14
                            If you look at a general application list, you see that the 3.8 Cougar rocker and the 460 rocker have different part numbers. If all they needed to be was the same ratio, they would have the same part number.

                            Comment

                              #15
                              The 1.7 ratio of the 302/351W rockers is achieved by moving the pushrod closer to the stud...

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