Quote:
Originally Posted by rick-l
My 81 Rx-7 has these features also. Of course it does pump oil into the carburetor and by design uses a quart every thousand miles.
Overheat will instantly kill them also.
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Not true on the overheat, I ran mine with a stuck closed thermostat at a 2 day DE, the car was slightly overheating on day 1 running in the 230° range and it ran like a champ all day. I did not think there was anything wrong and figured the temp gauge was going. On day 2 the temps soared to 280° and again the car was running strong, at one point I had let a driving instructor drive my car and he was pushing a Ferrari Challenge car around the track, we were not suffering from loss of power.
I was not until I got it home and looked at the warranty slugs on the side of the motor and saw they were melted, they were made of lead. Lead melts at 270°.
Then I looked my data logs and confirmed 280° all afternoon. The funny part was I drove the car around for a week after that and it would still turn sideways in second gear. When we did a compression test on it she only had 1/2 the compression at 50-60 PSI. We tore it down and everything was warped I basically tossed the entire engine out, BUT it never stopped running.
As yes, the carb injected oil was probably the last good way to pre-mix the gasoline. When they switched over to FI they had little oil injectors (think direct port injection) that were on the top of the rotor housings. They were useless.
I took mine off and premix my gas at the gas station in the same manner you would with a 2 cycle motor. So my car does not use any engine oil plus I get to premix oil designed for burning which is much cleaner. <--- thats is almost funny when you consider a rotary motor.