[Amc-list] overheating, and Smokey Yunick

[Tom Jennings <tomj@xxxxxxx>]

Speaking of overheating...

What with Bruce Hevner mentioning Yunick some time back I found a copy 
of POWER SECRETS cheap on abebooks.com. (I realized later I'd read it 
long ago, but lost it.)

OK, it's 100% Brand C, but man, it's worth reading. Every single thing 
the guy talked about (early 1980's) as 'new' or 'coming trends' has 
happened. Coil-per-plug, electronic FI, metallurgy, etc, you name it.

Funny too as a lot of what he recommends for making effective HP is ... 
boring, unexciting, and it looks like, rarely followed. He's one of 
those umm jerks who never believes what he's told, and tests tests 
tests. Probably pissed off a lot of friends. Stuff like when big cams, 
big valves, big lift all a waste of time (and when they're not). Spend 
money on exhaust systems (boring, unflashy). That sort of thing.

If you look at his projects you can see he deeply gets one really 
critical thing: heat as energy. He says an ordinary radiator, 18 x 20 
inches, is plenty, and mostly what he talks about building is 500 - 
700hp. The hint is, that heat should be going into the flywheel, not the 
water our out the tailpipe. Hot exhaust and hot heads means bad 
combustion, and that's true even in little street sixes.

Overheating, unless something's broken or plugged up, is an engine 
geometry or tuning problem, period.

If I had access to a dyno to build motors with, the instrument I'd use 
for tuning is an exhaust pyrometer. Max HP + lowest exhaust temp, there 
you go, as a rule of thumb you can't get better.
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