Announcement

Collapse
No announcement yet.

hp/tq/ and 1/4 with a 76mm/78mm turbo

Collapse
X
Collapse
Who has read this thread:
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • hp/tq/ and 1/4 with a 76mm/78mm turbo

    well since im buying into jonnys huron speed turbo kit for my bird im just wondering where it may stand once its all together. i know i have a lot of work and a lot of research to do before this thing hits the streets, but im just curious.

    i will be getting a specd cam for my setup and turbo
    im wondering if i should have the stock 5.3 heads cleaned up or use my stage 2 livernois 243s
    still plan on using my 3500 stall and 3.73 gears
    ls6 intake

    anything else im missing (big stuff)

    what can i expect after having a good tune?

    thanks

    also any other advice or suggestions would be great. i do not want to touch the shortblock at this moment except for possibly arp rod bolts. i will start a new build thread once i start the project
    sigpic
    11.84 @ 117 w 1.66 60' (previous na best)

    - - 5.3/4L80e/T7875 - -
    - Huron Speed Turbo Kit -

    1998 Formula

  • #2
    Your compression ratio will probably be very high with either 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


    • #3
      right im thinking only 8lbs of boost??? anything i can do to lower it? (thicker head gasket lol)
      sigpic
      11.84 @ 117 w 1.66 60' (previous na best)

      - - 5.3/4L80e/T7875 - -
      - Huron Speed Turbo Kit -

      1998 Formula

      Comment


      • #4
        Mike,
        first off, congrats on buying into the HS turbo kit! Let me know if you have any questions or need a hand with anything during the build.

        Personally I sold my Livernois Stage 2 heads and bought some stock 317's. Made $550-600 on the swap to spend in other places, the 317's lower your compression, and flow very close / same as stock 243's. If you plan to run E85 than you might consider keeping your 243's...

        Your power and 1/4 mile times will depend a lot on which 76 or 78 turbo you select. An on3 or Turbonetics will not make as much power with the same boost as a comp turbo or precision.

        Comment


        • #5
          11:1 and 8 psi typically requires e85 or meth kit, or so I've read. I have read people pushing more on premium but

          Many say that the 317 heads are the workhorse for boosted applications

          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


          • #6
            Congrats! I really wish I could be in your shoes!
            2002 Z28 Camaro A4
            1993 Z28 Camaro M6- SOLD
            1999 Z28 Camaro M6- SOLD
            2008 Ford Fusion SE - DD
            -- MCALUS MOLDED PILLAR PODS, PM ME FOR MORE INFO--
            sigpic

            Comment


            • #7
              what did the 317s come off of? working for weller i may be able to find some cheaper then most.

              dave what turbo do u have??

              what about a bullseye turbo?
              Last edited by Formula Z; October 6th, 2012, 06:31 PM.
              sigpic
              11.84 @ 117 w 1.66 60' (previous na best)

              - - 5.3/4L80e/T7875 - -
              - Huron Speed Turbo Kit -

              1998 Formula

              Comment


              • #8
                Originally posted by Formula Z View Post
                what did the 317s come off of? working for weller i may be able to find some cheaper then most.

                dave what turbo do u have??

                what about a bullseye turbo?
                317's are from the LQ4/9 6.0L. You can find them all day long on LS1tech for $200. I paid $175 shipped for mine...

                I have a turbonetics TC78...not the best because of the small exhaust side but it fits well within my budget and goals. Bullseye's are bad ass turbo's but they will cost you

                Comment


                • #9
                  what can i get for my stage 2 243s? cam is sold already but unsure on price for that also
                  sigpic
                  11.84 @ 117 w 1.66 60' (previous na best)

                  - - 5.3/4L80e/T7875 - -
                  - Huron Speed Turbo Kit -

                  1998 Formula

                  Comment


                  • #10
                    Originally posted by Formula Z View Post
                    what can i get for my stage 2 243s? cam is sold already but unsure on price for that also
                    I sold mine locally for $850 (no shipping). For shipping you need to figure an extra $50.

                    Ask $950-$1000 and work from there...

                    Comment


                    • #11
                      Shhhhh! I was going to ask if he wanted to trade for my 317's

                      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


                      • #12
                        Mike,
                        check your PM's on tech. I just sent some info over that I gave to someone else this week. Should get you started in the right direction

                        Comment


                        • #13
                          Thanks

                          Sent from my SPH-D710 using Tapatalk 2
                          sigpic
                          11.84 @ 117 w 1.66 60' (previous na best)

                          - - 5.3/4L80e/T7875 - -
                          - Huron Speed Turbo Kit -

                          1998 Formula

                          Comment


                          • #14
                            Take lots of pictures!

                            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


                            • #15
                              Find a good used Precision PT7675. You'll thank me later.

                              I would honestly put stock 243/799 heads back on the car if you planned on keeping it at 8 PSI. It'll make more power than 8PSI with 317's.

                              8PSI on a stock LS2 would probably make 550-ish RWHP.


                              Comment

                              Working...
                              X