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

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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...



Z you later...

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my 72, l24 gets 19mpg.how fast-don't know, haven't tried to wind her out.
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Here's some interesting data for you.....


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



    The Lone Potter

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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.

"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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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. :)

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