Loss of power after high speed run

[240Z4me]

Thanks. I just put the Z in the paint shop today, then I need to have the seats redone. Once I get it back I will give it a try.

[Murph]

Another huge difference I have noted since doing the valves is how well I starts! Previously when cold it'd turn over for say 2-3 seconds before spluttering into life, then I'd have to hold it at say 1500-2000 rpm for about a minute if I didn't want it to just die on me.

Now, it just instantly fires into life with a much more "fruity" note, and will idle immediately. It feels a bit stronger in the top end now, but the huge difference is the low end and mid range torque! It pulls so effortlessly at lower RPM now. It's like driving a different car.

[Alfadog]

Interesting.. maybe I should do mine when I get some time. My K used to start first time with half a crank, but since I changed to dual SU's I need to use the choke at first if I don't want to be cranking over and over and over.

[Murph]

I do still use the choke to start it cold. The thing was, before, even with the choke, it wouldn't fire up straight away.

Did the original single carb on the K have an automatic choke?

[kyteler]

No, the K's 2BBL Vacuum Secondary is Manual Choke, I always use the choke when starting, but it's probably a little colder down at the bottom of the South Island of NZ than it is where Alfadog is

[Alfadog]

, just a bit...

[Murph]

Just out of interest I'll try starting it without the choke tomorrow morning.