FB flywheel interchangability?
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Refined Valley Dude
Joined: Oct 2001
Posts: 2,283
Likes: 2
From: Kitchener, Ontario (Hamilton's armpit)
FB flywheel interchangability?
This was posted on rec.autos.rotary earlier today. I'd like to help the guy find his answers, if I can...
I an changing out a motor on my Spec RX7 race car.
The motor going in is a 1982 model (allegedly) that came from an auto trans car.
I'm ready to drop it in except I need to mount the flywheel and clutch assembly.
I have flywheels for 1983, 1984, and 1985 engines.
They all weigh the same - 23 pounds.
It is my recollection that flywheels compatibility goes something like this:
1981 and 1982 (these may be different)
1983 only
1984 and 1985.
To the best of my knowledge, I need to get a 1982 flywheel to keep in balance.
It may be that a 1981 will work.
I'm pretty sure the 1983 and later will not work.
If the only difference is clutch size, I have both covered.
I am concerned about the counterweight built into the stock flywheels.
Does anyone know the real answer?
The motor going in is a 1982 model (allegedly) that came from an auto trans car.
I'm ready to drop it in except I need to mount the flywheel and clutch assembly.
I have flywheels for 1983, 1984, and 1985 engines.
They all weigh the same - 23 pounds.
It is my recollection that flywheels compatibility goes something like this:
1981 and 1982 (these may be different)
1983 only
1984 and 1985.
To the best of my knowledge, I need to get a 1982 flywheel to keep in balance.
It may be that a 1981 will work.
I'm pretty sure the 1983 and later will not work.
If the only difference is clutch size, I have both covered.
I am concerned about the counterweight built into the stock flywheels.
Does anyone know the real answer?
Airflow is my life
Joined: Aug 2002
Posts: 6,736
Likes: 2
From: Orlando, Fl
Tell him to look at Felixs site. Its in my sig. IIRC he needs to use an 81-82 flywheel and front counterweight. 83-85 rotor weights are different so c/weights and flywheels from these years are NOT useable in an 81-82. Also M'trix has flywheel info in their FAQ's.
Amur, you can also look at the Mazdatrix site to help identify which flywheel is whic. Url - http://www.mazdatrix.com/faq/flywheel.htm
Good luck
Good luck
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