Fuel line
 

What internal diameter fuel line did people use for the 1.8 mx5 engine
Also which line is the feed and which is the return
Thanks
Stephen

I use 8mm copper through the trans tunnel and in not having any problems.
The feed line will be the one from the pump and the return line will be to the regulator.

Sorry i asked the question wrong
On the engine which pipe is the feed pipe and which is the return

I'm looking at this atm on my car
I'm pretty sure the fuel in is at the front of the rail and fuel return is the one after the regulator
Or its the other way round

Pressure line from pump is always to the rail....After regulator is return. Or it has been on every injection system I have ever worked on (and that's quite a few).

Hope that helps :D