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Message
Its tough to beat pure water for removing heat. But, this
NPG+ stuff might be worthwhile considering - who's going first?? My 0.02
worth.
Ed Anderson
Ed, you sure saved me a
lot of typing :-)
I've looked into the
Evan's stuff before, because it gets mentioned on the RX-7 forums a bit.
It's a known fact that it doesn't cool as well as water, or even 50/50 water
antifreeze. Their main claim is that you can get better fuel efficiency at
higher temps, however, higher temps are not good for our engines, and they
aren't good for power either. Here's a quote from Lynn that was in a
previous message:
The engine builder reports
power lost above 160 degrees on the oil temp. Water under 200 is OK. Power
loss above 180, but no damage.
Remember the rule, when
Lynn speaks, I take notes :-)
The main thing that I
find interesting about the Evan's coolant is that you can run a no-pressure
system. That would certainly eliminate some leak potential.
Also, I wonder if it wouldn't extend your engines life a bit in the
event of a leak, slipping belt on the water pump, etc. I can't see it
saving the engine, but it might give you more chance to make an airport
landing.
If I end up with too
much cooling capacity in the final cowl version, I'll think about
trying the Evan's stuff.
Rusty
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