1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

10mpg

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Old 01-13-11, 08:03 PM
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Congrats with your success.

That first overheat was probably trapped air in the system; but keep an eye on it. Normally the engine should run in the lower third to lower half of the stock guage depending on outside air & if the gauge is actually working right.

Overheats are not something to ignore; heat is a rotary's enemy.
Old 01-14-11, 09:41 AM
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Ah thank you! Of course, the trapped air! I didn't bleed the system after removing the thermostat! It's running great now. It sits on the lower left hand side. It used to sit at the half way mark on the fuel, but no longer does! The car is still running great and everything seems to be going swell with it. I finally managed to get my wideband gauge to work and it's reading around 10:1. Can I adjust my fuel with the idle air mixture screw? I messed with the screw quite a bit to get my idle right when I rebuilt the carb, but I wasn't sure if it will make a difference when the car is cruising. From what I have gathered from Sterling, the idle air mixture screw is for the idle circuit. I need to bring the fuel down a bit...
Old 01-14-11, 09:55 AM
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I concur with Sterling. Once the throttle plates open widely enough to reach the transition circuit bleed and then start drawing from the main jets, the idle circuit mix is pretty irrelevant.

Changing main band mix is a matter for float levels and main jets and bleeds, in my understanding.
Old 01-15-11, 04:31 PM
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Alright cruising around 2 - 3k rpms it's around 10.5:1 on my wideband gauge. How do I fix this?
Old 01-15-11, 06:41 PM
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First, make sure your ignition is truly getting the job done, and you're not dumping a chargeful of unburned fuel now and then.

Second, make sure your secondaries are closing fully when they are supposed to be.

Then, make sure your main and secondary jets aren't mixed up on one side - - easy to do.

Finally would be to start dialling down jet size, I'd guess. I've never had to go that far to get reaonable mix.
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