rotor swapability
01-14-04, 04:03 PM
#1
Full Member
Thread Starter
Join Date: Dec 2003
Location: Austin, TX
Posts: 214
Likes: 0
Received 0 Likes
on
0 Posts
rotor swapability
I have a four port 13b I was wondering if I could swap in other rotors without a big problem. I'm looking at getting the 9.7:1 rotors from the later 13bs.
01-15-04, 07:26 AM
#4
I read your email
Originally posted by wwilliam54
you need to use a front and flywheel counterweight that matches the rotors tho
you need to use a front and flywheel counterweight that matches the rotors tho
Also more related info from RX-7 Forum > Tech and Performance > General Rotary Tech Support forum
Originally posted by rgordon1979
I am in the process of rebuilding a '88 TII engine. In the process of finding a new rear rotor and housing I came across something I have never seen on here before.
As you know, Mazda balanced each rotor at the factory. Due to slight variations in the balancing process, each rotors weight varies slightly. Mazda designates this variation by stamping a letter, (A-E), on the gear side of the rotor. According to Mazda the rotor weight should not vary more than 2 letters in an engine. Ideally, you should have matching rotors. I did verify this with Henry at Mazdatrix. If this is common knowledge, sorry to take up the bandwidth, just wanted to let everyone know.
Rob
I am in the process of rebuilding a '88 TII engine. In the process of finding a new rear rotor and housing I came across something I have never seen on here before.
As you know, Mazda balanced each rotor at the factory. Due to slight variations in the balancing process, each rotors weight varies slightly. Mazda designates this variation by stamping a letter, (A-E), on the gear side of the rotor. According to Mazda the rotor weight should not vary more than 2 letters in an engine. Ideally, you should have matching rotors. I did verify this with Henry at Mazdatrix. If this is common knowledge, sorry to take up the bandwidth, just wanted to let everyone know.
Rob
01-15-04, 08:13 AM
#5
The infamous number guy!
Join Date: Dec 2002
Location: Terre Haute, IN.
Posts: 1,953
Likes: 0
Received 0 Likes
on
0 Posts
The geometry of the post '85 13b rotors had different geometry (unsure of the 4-ports, but different from GSL-SE 13b 6-ports). They will work, but you will have a risk of them coming into contact with the rotor housing at high RPMs.
Ask a place like Mazdatrix for information about this.
Ask a place like Mazdatrix for information about this.
Thread
Thread Starter
Forum
Replies
Last Post
stickmantijuana
20B Forum
9
09-22-15 07:39 PM