Posted June 3, 200519 yr comment_126218 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... Link to comment https://www.classiczcars.com/forums/topic/16143-top-speed-and-mpg-of-1974-260z-help/ Share on other sites More sharing options...
June 3, 200519 yr comment_126240 my 72, l24 gets 19mpg.how fast-don't know, haven't tried to wind her out. Link to comment https://www.classiczcars.com/forums/topic/16143-top-speed-and-mpg-of-1974-260z-help/#findComment-126240 Share on other sites More sharing options...
June 3, 200519 yr comment_126242 Here's some interesting data for you.....http://zhome.com/History/zcarperf.htmlLARRY Link to comment https://www.classiczcars.com/forums/topic/16143-top-speed-and-mpg-of-1974-260z-help/#findComment-126242 Share on other sites More sharing options...
June 3, 200519 yr comment_126249 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 Link to comment https://www.classiczcars.com/forums/topic/16143-top-speed-and-mpg-of-1974-260z-help/#findComment-126249 Share on other sites More sharing options...
June 4, 200519 yr comment_126324 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. Link to comment https://www.classiczcars.com/forums/topic/16143-top-speed-and-mpg-of-1974-260z-help/#findComment-126324 Share on other sites More sharing options...
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