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dmanzo57

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Posts posted by dmanzo57

    TH350 to 700R4 speedometer questions

    in Drivetrain

    Posted

    You can get new speedo gears from your local Chevy dealer. The following web page has info on

    what gears are available and how to figure out which gears you need...

     

    http://www.tciauto.com/tech_info/speedo_gears.htm

     

    The Datsun speedo uses 1024 revs per mile vs. 1001, so make that change when you do the math.

     

    The gears run about $30 to $40.

     

    :cheers:

    Don

     

               # Drive Teeth X Axle Ratio X Tire Rev. per Mile 
       --------------------------------------   = # Driven Teeth 
                            1024 


Use the following formula to calculate the Tire Rev. per Mile for the above formula. 

                                            20168 
Tire Rev. per Mile =  ---------------------- 
                                     Tire Diameter (inches)

    ??? about linelocks

    in Brakes, Wheels, Suspension and Chassis

    Posted

    No trouble at all.

     

    The line lock didn't come with any fittings or switch. I had to get that stuff at my local parts store. I mounted the toggle switch on the console, on the door that covers the fuse box.

     

    I'm running an auto trans, so I just use the foot brake at the starting line. The line lock is used for the burnout only.

     

    :cheers:

    Don

    ??? about linelocks

    in Brakes, Wheels, Suspension and Chassis

    Posted

    I recently installed a line lock in my '72 240z. I got the Biondo line lock from Summit for $40. I spent another ~$15 on bake lines, fittings, and a cheap tubing bender.

     

    The instructions said to install the line lock after the brake pressure warning switch, but that would really complicate the plumbing. I noticed that a few members here installed it between the master and the warning switch, so I did the same. I bought two metric to 3/16 adapters and then used 3/16 lines and fittings to plumb it up.

     

    Result:

    http://home.earthlink.net/~mmanzo/_uimages/v8z_burnout1.jpg

     

    :cheers:

    Don

    what are the NHRA rules for suspension on fast 1/4 mile cars

    in Drivetrain

    Posted

    I found some more info at NHRA.com...

     

    NHRA finalizes 1999 rules changes

     

    9-7-98

     

    INDIANAPOLIS - The NHRA General Rules Committee

    finalized rule changes for the 1999 racing season at a meeting Wednesday night during the U.S. Nationals. Details on some rule changes are still being ironed out, but highlights of the changes are as follows.

     

    E.T. Brackets

    A long-standing rule that requires any car with

    independent rear suspension (IRS), weighing over 2000 pounds, and running 10.99 or quicker to replace the IRS with a conventional rear-end housing has been modified.

    For 1999, only those IRS designs which utilize a lower control arm only (like a 1963 to 1982 Corvette) will have to comply with the above requirement. If the suspension utilizes both upper and lower control arms, the IRS may be retained regardless of weight or e.t.

     

    cheers.gif

    Don

    Shifter

    in Drivetrain

    Posted

    The Hurst Quarter Stick should fit without cutting the console. I've got one in my '72. I covered the hole in the tunnel with a 1/8" thick plate and mounted the shifter to the plate. I can take a couple of pictures if it will help.

     

    cheers.gif

    Don

    How far off????

    in Brakes, Wheels, Suspension and Chassis

    Posted

    Here's the formula I used to figure out which speedo gears I needed to recalibrate my speedo after changing rear end gears and tire sizes...

     

     

    Note: Drive gear refers to the gear that is on the transmission output shaft.

    The driven gear is located in a removable housing usually in the tailhousing

    of the transmission.

     

     

    # Drive Teeth X Axle Ratio X Tire Rev. per Mile

    ---------------------------------- = # Driven Teeth

    1024

     

     

    Use the following formula to calculate the Tire Rev. per Mile for the above formula.

     

     

    20168

    ---------------- = Tire Rev. per Mile

    Tire Diameter (inches)

     

     

    cheers.gif

    Don

    383 now or later

    in Gen I & II Chevy V8 Tech Board

    Posted

    Here are some estimates assuming you are starting with a 350 that needs a rebuild...

     

    ~ $25 more for 383 pistons vs. 350

    ~ $325 for new 383 crank

    ~ $220 for new harmonic damper(SFI, external balance)

    ~ $60 for external balanced flexplate

    ~ $?? clearance block and rod bolts for stroker crank.

     

    cheers.gif

    Don

    weight of my Z

    in Miscellaneous Tech

    Posted

    My HP calc says, at 2450 lbs, you only need ~490 rwhp(and a good launch) to run a 9.99. That should put you at about 136 MPH.

     

    I would weigh the car first. It's would be more accurate than calculating based on HP.

     

    cheers.gif

    Don

    $1.98 posi ???

    in Drivetrain

    Posted

    I remember reading about this trick for the 9" Ford open differential.

    It involved adding shims in the differential to tighten it up and make

    it act like a posi-traction, for a while at least.

     

    Would this work on a R200 open differential? Where would the shims need

    to be placed?

     

    Thanks,

    Don

    cheers.gif

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