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I have to agree with you on that. Interesting to see prices in Japan and EU are much higher than in the US. Maybe because they are more rare, of has to do with economic prices?

I know there are still enough 240z's in the USA, but I would leave a 240Z alone, mod the 260 and 280z's...

Did they used metallics back in the day ?

240z emblem on the rear was series 1 right ? Datsun : Z-Series 2 doors Coupe in Datsun | eBay Motors

Yup, they are practically new, he had them on for a few hundred miles, let's hope the problem is solved with it... then we also know the answer to the problem.

Let's wait and see, I do agree with Kenobi, he has a point there. I bought the ztherapy rebuilded carbs from Grannyknot, and will put them on when they arrive, and see what happens...

I really want to order a set of rebuild 4 screws from Ztherapy, but they don't seem to respond to people outside the US

can you tell me what you adjusted ? I did the bellcrank mod, but maybe I shouldn't have done that.

I bounced up a topic in the carb section, that guy has exactly the same problem i'm having, curious if or how he fixed it..

I'm experiencing exact the same problem right now, so I'm bouncing this topic up, did you find any solution ?

nice !

I asked a professional carb rebuilding company from Belgium ( not so many around here ), and he says he doesn't understand why the gas pedal operates smooth when engine is off ( only on the pedal, because direct @ carbs you can feel the tensions of the springs ), but heavy when engine is running.

Cool. I like how they name the 240Z now in the segment of classic cars, because it's not such a known car here...

ýeah that's the million dollar question

Nice find ! I would put some new undercoating on the car, now you cleaned it.

Datsun : Z-Series 240Z RESTORED FLORIDA - 5K MILES in Datsun | eBay Motors looking good imo

Found this worth saving.. the 240Z is named as a classic and worthy investment..

That's really to low imo , I've set it just under 1000 rpm, like most cars do here. But I tried with the linkage unhooked, and feel how the butterfly valves operate on a running engine when turned by hand, and they still operate heavy, so.. problems with worn shafts then ? I can't seem to think of anything else at the moment. There's no play in the linkage. Could a to heavy damper oil, or a shortage of incoming air cause this to ? Altough I can't see a direct connection

took the gas pedal off, and cleaned/lubed the rotating part, it helped again in anything above 1500 rpm , but still not the heavy part in the beginning for driving away

If you found a solution let me know ! My dad also said something about idle speed, but setting it back to 800 rpm didn't have any effect

yeah something like that, I checked between work today but couldn't find anything odd. But if the butterfly valve was contacting the throttle body, then wouldn't it also be when the engine is not running ? It's only when it's running...

yeah when engine is running, it feels like engine vacuum is pulling on it my dad had one in the 70's and he said didn't have it, so must be a wear problem. Still thinking the carburetor axle and the linkage on the manifold cause to much resistance due wear.. but didn't have time to check it yet, will do saturday

Did this project ever finish ?

Maybe the butterfly axles in the carburetor are just sticking in the closed position due wear overtime, i'll have a look next week. Because it's the heavy point I need to overcome then suddenly it goes, I can't see how this got to do with even a linkage with play.

mm, so the problem must be in the butterfly shafts on the carbies...