your best bet if you want to stick with the 12a motor is to buy the j-spec 12a which comes factory with a turbo. I found one i believe it was on "engineland.com" for 900 bucks so it isn't to expensive
Depends, which engine is in the 85, 13b or 12a?
try cleaning your carb that's what i did and it fixed my problem
Gsl= 12A , Gsl-se 13B.
they only come with one engine. a 1.1L carbureted 12A rotary.
The timing for a 1985 Mazda RX-7, equipped with the 12A rotary engine, is typically set at 8 degrees before top dead center (BTDC) at idle speed. It's important to ensure that the engine is at operating temperature and that the vacuum advance is disconnected when setting the timing. Always refer to the vehicle's service manual for the most accurate specifications and guidelines for your specific model.
To adjust the idle on a 1981 Mazda RX-7 with a 12A engine, locate the idle adjustment screw on the carburetor. Start the engine and let it warm up to normal operating temperature. With the engine running, turn the idle adjustment screw clockwise to increase idle speed or counterclockwise to decrease it, aiming for a target idle speed of around 800-900 RPM. Finally, check the idle quality and make minor adjustments as necessary.
mazda rx7 Cars that have used a rotary engines 10A, 12A, 13B, 20B: mazda...Cosmos, R100, RX2, RX3, RX4, RX5, RX7,& R8 Rotary engines where first designed by Mercedes and then sold to mazda and build in Heroshima, they where also used by NASA in a single rotor format.
AnswerYes, mounted in the fuel tank.On the 1985 12A engine (carb) there is an electric fuel pump, but it is NOT located in the tank - it is located under the car as part of the fuel line - kind of right under where the back, driver's side seat would be if it had one. Access is suppose to be thru an access panel from above but when I replaced mine it was easier to get to from below. Not a hard job, Ebay may have the pump for $80 and some change last ime I checked.
12a-a = 11a
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The first way is to look at the engine. 12a is a 1975-84 1st Gen SA3S/FB3S 13b is the 1985-91 2nd Gen FC3S 13bREW is the 1992-95 3rd Gen FD3S there is an exception, there was a model of 1st gen that had a 13b engine, it is the GSL edition. (FB) You can also tell by the body style. The first gens looked like tiny Datson 240s, the 2nd gens looked like Supras and Porche 924s, and the 3rd gens look like smaller versions of the Viper (kinda)
Yes, it is a 12a