Yes, heat soak. And yes, that is why you will see so many Cobras with the hood up after a run. It is not to show off the glowing red headers, although, at night it looks really cool. Then there are the rookies who just got the car running. The panic ensuing a fuel boil over is almost comical to watch, but scary too. We have had a couple of cars boil over while they were driving. Texas heat.Elliot wrote:In my day... ... this phenomenon was called heat soak. Perhaps still is.Skuzzy61 wrote:...
The problem occurs after a hot run and stopping. There is just no place for the heat to go.
At least, open the hood.
In my garage sits a car belonging to my brother, with a 350 Chevy and conventional HEI ignition -- and a no spark condition. I haven't looked at it in months, but I do want to get it running.
Primary suspect is the power supply. This car originally had breaker points, and I expect the juice still goes thru a ballast resistor. The wiring is the worst I have ever seen. Turn on the ignition and the parking lights come on.
When I eventually get back to it, I reckon I will try a wire -- with fuse, yes -- straight from the battery. But I don't even know which terminal on the HEI it goes to. The previous butcher may perfectly well have done that wrong too.
I'm just kind'a thinking out loud. There must be 40-eleven websites with this info, and testing-procedures. But I will listen to the simplest version if it comes along.
(You don't want to know that the car is a 1973 Datsun 240 Z, bought sight unseen on eBay -- from Florida.)
Most cannot use an insulator as they are already having hood clearance issues. I know I am having to consider a bulge in the hood if I go with a snorkle intake manifold. One of the cars has a unique solution. He added A/C so he could blow cool air at the carburetor and into the air intake. Twisted lot. lol!
Had a girl friend in high school who had a 327 in her 240Z. Scary fast car, but she was forever breaking the rear end of it.