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Project 1988 T/A GTA

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  • #61
    The was told the roller rockers I bought were 1.5 ratio. Further research shows that the idiot had 1.6 rockers. So, how bad is it if I use the 1.6 rockers?

    Do do I have to spend bucks on nice 1.5 rockers so I don't over cam the engine?
    1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
    2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

    Always Missed
    1999 VW Passat 1.8T/5-speed
    1996 VW Jetta VR6/5-speed
    1988 Mazda 626 5-speed 300,000 miles

    Comment


    • #62
      Lift would be 520 and 528 with 1.6 rockers. A good set of valve springs will handle that lift for a long time.

      1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
      1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
      1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

      2006 Saab 9-7x 5.3i Daily Driver

      Comment


      • #63
        Awesome. I went with some comp beehive springs. Just didn't want to put those 1.6s in there and blow the valves/pistons

        edit: comp cams 26981 for the springs.
        Last edited by Lortay5408; April 6th, 2015, 09:50 AM.
        1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
        2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

        Always Missed
        1999 VW Passat 1.8T/5-speed
        1996 VW Jetta VR6/5-speed
        1988 Mazda 626 5-speed 300,000 miles

        Comment


        • #64
          981 have an install height of 1.700, they coil bind at 1.115 (@ .585 lift) which means you're going .003 under Comps recommended clearance of .060. Will it cause a problem? Not likely in a TPI build.

          If you can't hit the 1.700 installed height (a little over would be ok in your situation) then you will need different valves, or retainers, or machine the pocket depth in the head.

          1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
          1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
          1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

          2006 Saab 9-7x 5.3i Daily Driver

          Comment


          • #65
            She'll poop out at 4000 rpm anyway so I'm going to roll with it. .003 within spec is still in spec. Valve float would probably be monstrous at 4000+ anyway with the 1.6rr.
            1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
            2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

            Always Missed
            1999 VW Passat 1.8T/5-speed
            1996 VW Jetta VR6/5-speed
            1988 Mazda 626 5-speed 300,000 miles

            Comment


            • #66
              You're .003 too close to coil bind, out of spec. Should be ok though. Highly doubt you will see valve float under 5000 but can't say anything about longevity of the springs.

              Just make sure you get the installed height spot on or a little over 1.700

              1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
              1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
              1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

              2006 Saab 9-7x 5.3i Daily Driver

              Comment


              • #67
                This was all done within 10 minutes. Oh the vomit is everywhere.

                BadlandzHPE 3 inch custom Cutout = $170
                Hooker Aerochamber = $370
                Hooker Headers = $424
                Hooker y-pipe = $264
                Magnaflow Cat = $169

                1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
                2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

                Always Missed
                1999 VW Passat 1.8T/5-speed
                1996 VW Jetta VR6/5-speed
                1988 Mazda 626 5-speed 300,000 miles

                Comment


                • #68
                  Ouch...a $1400.00 day. Haven't had one of those since I bought the car itself.
                  DynoDave
                  POCI # 72200



                  1988 Pontiac Trans Am WS6

                  Comment


                  • #69
                    Better than Christmas morning when I got home from school tonight.

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                    1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
                    2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

                    Always Missed
                    1999 VW Passat 1.8T/5-speed
                    1996 VW Jetta VR6/5-speed
                    1988 Mazda 626 5-speed 300,000 miles

                    Comment


                    • #70
                      Nice!

                      Sound clip when it's installed, please.
                      DynoDave
                      POCI # 72200



                      1988 Pontiac Trans Am WS6

                      Comment


                      • #71
                        Got some work done in the shop today. I will need to get different centerbolt valve covers. I drilled out the insides, but still not tall enough for my roller rockers.

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                        Last edited by Lortay5408; April 21st, 2015, 09:41 PM.
                        1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
                        2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

                        Always Missed
                        1999 VW Passat 1.8T/5-speed
                        1996 VW Jetta VR6/5-speed
                        1988 Mazda 626 5-speed 300,000 miles

                        Comment


                        • #72
                          I have a set of valve covers that would probably work for ya!
                          "Project Shadowfax" <- Clicky Clicky

                          1984 Pontiac Trans Am (15th Anniversary Edition)
                          L69 (High Output 5.0) / 700r4 Auto Trans



                          Comment


                          • #73
                            I think I bought the stock ones from you! What do you have that would be taller? I'm finding ones for $180+ (bulls**t) for only 1/4" gain in height.

                            What ya got?

                            pictures?
                            1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
                            2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

                            Always Missed
                            1999 VW Passat 1.8T/5-speed
                            1996 VW Jetta VR6/5-speed
                            1988 Mazda 626 5-speed 300,000 miles

                            Comment


                            • #74
                              Quick question:

                              I need some new roller lifters. Would GM Part#: 12499225 work for my application? They are for LS engines, but I think these would work and would like some conformation.
                              1988 Trans Am GTA 355 TPI/700r4 Summer/Fall Driver
                              2001 Nissan Pathfinder V6 4x4 Loaded and Rusty Winter Beater

                              Always Missed
                              1999 VW Passat 1.8T/5-speed
                              1996 VW Jetta VR6/5-speed
                              1988 Mazda 626 5-speed 300,000 miles

                              Comment


                              • #75
                                they will work

                                1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
                                1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
                                1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

                                2006 Saab 9-7x 5.3i Daily Driver

                                Comment

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