PHT80Y's first track day

MightyBoy tech questions and answers.
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eDave
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Joined: Mon Apr 12, 2004 9:11 pm
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I took my boy out to Wakefield at the drop of a hat with some of my mates for a couple of roundie roundies at an event organised by the Honda Car Club of NSW.

The boy behaved wonderfully, all of the work I've put into it paid off and I got no complaints from it except when I went out for a second session without letting the engine cool down (it conked out somewhere around turn 6). Still, you can't hold a good mightyboy down! I let it rest for a few minutes and it sprung back to life instantly. (And it also made the trip home flawlessly).

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Wakefield is a track made for smaller nimbler cars! Perfect for the likes of us all!

More pics: http://www.zigzig.net/tosh/Wakefield26-04-2004/
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Josh
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Awesome Dave! :D

What's the technical explanation behind that little overheating episode, though?
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eDave
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prolly the lack of a temperature gauge! :P

In all seriousness.. 10 laps is pretty impressive for a stock engine. I'm not sure if it was overheating at all.. It just started missing as I came down the straight and then fell to pieces half way around and conked. Might well have been a fuel delivery problem (fogging or boiling fuel) who knows.. I might even have emptied my surge tank.

When it came good I brought it in and I could still put my hand on the radiator cap without any problems.. *shrugs*
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Josh
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Hmmmmmmm... interesting...
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eDave
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I discussed it with a bloke here at work and we came to the conclusion that it may well have been boiling fuel. My surge tank is about 1 litre and that fuel is constantly circulating to the engine and back to the surge tank. If I'm using a lot of fuel then the speed of the fuel traveling through the hoses is very high. If I was to change the fuel system setup so the fuel returns to the fuel tank instead of the surge tank then I'll be looping ~20 litres intead of 1.

A potential solution.

The only down side is that the level of the surge tank will drop if the volume of fuel moved by the pre-pump is less than the engine's usage, which pretty much eliminates it's usefulness.
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Josh
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Hmmmmm... Gotcha. :)
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