Hi Don , thank you for the joining here ,
Yes I still use the mechanical fuel pump and the cooling fan , I do not want to change those things because I love Stock .
I have had a trouble once or twice about fuel during my ownership since 2000 , that was overflowing from the SU carb fuel chambers .
I opened the chambers and checked the fuel floats, they seemed twisted sideways and sticking to the wall , then fuel valves were stuck open. If I drive my Z in a traffic jam under such a hot day , I will have the same trouble again .
Oh , when I brought my 240Z for Las Vegas ZCON 2000, I had a vapor locking . I parked my car under the strong sunshine , after returning from the drugstore , the engine hesitated to fire up . I tried to start several times , then finally I made it .
Nowadays Japan’s summer is extremely hot , tomorrow will be 37 degrees Celsius (98.6 Fahrenheit) , when I was a kid , max was like 30 C ( 86 F ) .
We can see this in the first service manuals ( Nov 1969 ) , a section Engine shows SU fuel mixture diagram. The diagram has a scale only up to 30 C or so .
This is my biggest question, people in hot area like you Don , did they have a vapor lock trouble back in 1970s ? Was it not hot that high back in those days ?
Kats