hey guys kinda stupid question here i have an 82 fb and im doing a s4 13b swap in it and i got a 83-92 na 13b racingbeat aluminum flywheel for it. it will fit with no problem right? and also what starter should i use?

 

anyone? is the 83-92 na flywheel the same size as the earlier flywheels? please need to know.

 

This will help. Just remember, when using a stock flywheel, you must match the rotating assembly with the flywheel. A factory first gen flywheel will not work with an S4 13b because the rotating assembly weight is different. If your using an aftermarket lightweight flywheel, you will need to corresponding S4 automatic counterweight.

Flywheels

Racing Beat has all the information you need and answers your question here.

http://www.racingbeat.com/RX7-1986-1...els/11437.html

Flywheel Counterweight Chart
(Select your engine model year)

1974-82 12A (Mazda # 1883-11-751A - very limited availablity)
1974-85 13B (Mazda # 1029-11-751A - very limited availablity)
1983-85 12A (Mazda # N226-11-751A - Discontinued by Mazda
1986-88 13B All (Mazda # N3Y8-11-52X)
1989-95 13B All (Mazda # N3Y2-11-52X)
2004-11 13B RX-8 (Mazda # N3Z2-11-52X)

 

i have the counter weight for the s4.... im trying to figure out why racing beat did the 79-82 and the 83-92 or whatever flywheels. im wondering if theres a problem in the bellhousing, like starter location or how its mounted... if anyone knows please chime in

 

Standard and turbo s5/s4 is a 225mm flywheel and clutch PERIOD. ALL NA starters are the same basically. EXCEPT s4/s5 starters added the drain on the bottom and the top starter bolt is threaded to eliminate the nut at the top.

79-82 is a 215mm flywheel.

S4/s5 turbo trans and auto trans use the same starter but its different from the NA.

The counterweight matches the engines rotating assembly has nothing to do with clutches or transmissions or bell housings.

 

so what your saying is the the flywheel i have will not work with my 82 trans right?

 

Yes 13b 225mm you have is right. You need a s4 counterweight and your good to go. You can use the 12a starter

 

Don't see why you can't use the 82 12a trans. I used an 85 in an 82

 

idk im just making sure cause they did the tranny style change in 83 to the block mounted slave cyl 82 is stilll bellhousing mounted and i was just being cautious and would it be beneficial to use a fc starter? like stronger last longer? i know my 85 starter gave me nothing but trouble melting my cables and the solenoid was always loose went through 2 of em cause of that crap...

 

I think the 13b starter sounds better. But your not really comparing apples to apples. 2 starters. One 12a one 13b I don't think reliability is really an issue. I've never really had trouble with either. I have four 12a starters on the shelf if you need one.

 

I think all of them were bell housing mounted. My S5 vert is, the s4 engine trans combo I put in my 83 is, my sons 85 trans is on the bell and so was the 79 trans I sold. Even the t2 trans I used for my Cosmo swap is bell mounted. The bolts strip out real easy. So when they are out I just drill tap and helicoil them anyway.

 

lol thats whats up yeah i like the way the fc starters sound compared to the fbs. we might do some business we will seee