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Top speed and MPG of 1974 260z??? help

This is a discussion on Top speed and MPG of 1974 260z??? help within the Open S30 Z Discussions forums, part of the 1st Generation Z (S30) category; Hey guys, Just wondering if theres any 260z owners out that would give me some input if my car is ...


  1. #1
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    Exclamation Top speed and MPG of 1974 260z??? help

    Hey guys,


    Just wondering if theres any 260z owners out that would give me some input if my car is running right. On a strait away i can barly get this car above a 100mph...I know somthing is deffinalty wrong B/c when you open the glove box u see the tire pressure Recommendations ... Over 100 and under 100../.. yea this is Definitely tellin me somthing is wrong.. In the car im runin a L28 engine out of a 280z with a 4 speed tranny.. as for the carbs go i have an earlyer set off off SUs out of a 71' 240z...Also as in regards to Mpg.. im getting under 20 mpg. Is that normal? i know this car needs a tune up...

    Thanks,

    Steve

    Z you later...
    Attached Thumbnails Attached Thumbnails Top speed and MPG of 1974 260z??? help-46b9.jpeg  

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    Registered User zhead240's Avatar
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    Default mpg

    my 72, l24 gets 19mpg.how fast-don't know, haven't tried to wind her out.
    to be or not to be- shakespeare
    do be do be do- sinatra
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    Cool

    Here's some interesting data for you.....

    http://zhome.com/History/zcarperf.html

    LARRY
    75 280Z 355 SBC with a Weiand 144 Pro Charger, 195 AFR heads, R-230 Diff Conv.!!!

  4. #4
    The Lone Potter v12horse's Avatar
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    Default

    I get about 20mpg on freeway and about 15 in the city. If I am driving more aggressively I get about 10-12mpg in the city. I have gotten my car upto 105mph along time ago. I thought it was going to lift off. I never did it again. The top speed for a stock 260z is about 125mph. The stickers on the glovebox door are referring to the 175HR14 Bridgestone tires. I don't think it matches with new tires. I have 195 by 70 14" tires and I inflate to 32psi. the numbers are different for the original tires.

    OT: Thanks for the link Larry. I know that the California export 260z's were rated at 139bhp, but my car was bought from Illinois and the plate in the engine bay says 162bhp. I am assuming this is because the California cars had to meet the smog laws.

    Ben
    Last edited by v12horse; 06-03-2005 at 12:52 PM.
    "A real sports car chooses its owner because it has a soul. If you're chosen, you'll love it, and the more it requires care and maintenance the more you love it." -Mr. Morita (Z432 owner)

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  5. #5
    OK! ...I made it up. g72s20's Avatar
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    Question

    Hi Steve,
    It's a bit of a tangent, but is the glovebox tyre placard in Kilometres per hour, or miles an hour?. For safetys sake it's a big difference. 100mph is ~ 160 kph...or 100kph is ~60 mph.
    Jim.
    Regards,
    Jim.


    1972 Skyline GT-X (GT-R copy)KGC10

    Prince & Skyline spoken here

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