Is 99 degrees celsius water temp too hot for my rotory?
I have an 87 mazda rx7 turbo II and I asked a similar question about a week ago. The answer I got was 86 C was normal. The engine is almost new with less than 5000 miles on it, stock turbo, running about 10 psi ,no emissions, no a/c, no p/s, mild street port, upgraded ecu with stock injectors, FMIC, custom 3 in exhaust. My stock temp gage is hanging out right at the half way point when my aftermarket gage reads 99 C. It only gets that warm when the ambient temperature is around 90 F, on cooler days the car runs about 86 C. It doesn’t give any sign over overheating like boiling or steam or anything, that just seems warm and I never had a real temp gage on any of my rx7’s.
To determine what is too hot, take a look at the coolant cap. Most likely it is a 17 lb cap. Then do the math to find out what the boiling point of water is at that pressure (100/14.5)=(x/31.5) (I think that is right, pressures must be absolute). To save you the math, 86C is not too hot. To my way of thinking it might be too cool.
RX7 TURBO VS SUBARU TURBO ARRANCONES ROSARITO
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