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Correct Speed

This is a discussion on Correct Speed within the Drivetrain forums, part of the LSx Technical Help Section category; Right now I have 255X45Zx17 inch with 4:10 gear and my speed reads 75 at 1800 RPM'S // 70 1600 ...

  1. #1
    Member StoreKeeper99Z28's Avatar
    Join Date
    Jul 2005
    Pacific Beach //San Diego,Ca,U

    White with Black Top
    1999/ Z28

    Question Correct Speed

    Right now I have 255X45Zx17 inch with 4:10 gear and my speed reads 75 at 1800 RPM'S // 70 1600 with 26.1 set in the PCM.

    Does this sound right?

    Any input would we greatly appreciated

    Thanks in advance

    99Z28/M6/ Pro 5 and Lou's "Short Stick"/ AAP Custom Y Pipe 3"/ 4:10 Gears CMS/ Chrome ZR1 Rims/MMS Aggressor Cam 233/233/578/578/113 lsa/Mac Mid-Lenth Headers/Don lee Auto Ported Throttle Body and Ported LS6 Oil Pump/AAP 6.0L Heads/SLP Dual Cam Roller Chain/MMS Mike Morgan e-Tune,Dyno Tuning.

    Dyno: Sept 9,2008

    439 RWHP/398 Torque

  2. #2
    That guy thearborbarber's Avatar
    Join Date
    Nov 2007

    White over Red
    1991 Suburban

    Not quite there yet.

    I always confirm my setting with a stop watch and cruise set a specific speed and go between 2 mile posts on the interstate. I use 80mph/45 seconds and 60mph/60 seconds.

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