3 rotor question?
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Joined: Mar 2009
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From: Whitby
3 rotor question?
Hey Guys,
is it possible to make a three rotor using all s4 TII housings and irons(but would use s5TII rear iron) and adding in the center plate? will the 20 b eshaft work, would I need a 20b front cover? Would the TII oil and water pump be sufficient?
is it possible to make a three rotor using all s4 TII housings and irons(but would use s5TII rear iron) and adding in the center plate? will the 20 b eshaft work, would I need a 20b front cover? Would the TII oil and water pump be sufficient?
Joined: Mar 2001
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From: https://www2.mazda.com/en/100th/
basically no.
the 20B uses unique irons, with unique ports, and it has different through bolts than the 13B's. if you had a mill you could use 13B rear and center irons, but the ports would be weird, and you would need to make an intake.
the 20B uses S5 T2 rotors (same part number), so those work. if you use S4 you would need to rebalance, as the 20B has unique counterweights.
the 20B used unique rotor housings too, but any 86-03 housing will work, the cosmo had a different exhaust port insert designed to let more air pump air into the engine, so it could have a lower and more stable idle.
the 20B used a front cover that is like an S5 T2, so that would swap over.
i believe the FD and 20B had the same oil pump.
the 20B uses unique irons, with unique ports, and it has different through bolts than the 13B's. if you had a mill you could use 13B rear and center irons, but the ports would be weird, and you would need to make an intake.
the 20B uses S5 T2 rotors (same part number), so those work. if you use S4 you would need to rebalance, as the 20B has unique counterweights.
the 20B used unique rotor housings too, but any 86-03 housing will work, the cosmo had a different exhaust port insert designed to let more air pump air into the engine, so it could have a lower and more stable idle.
the 20B used a front cover that is like an S5 T2, so that would swap over.
i believe the FD and 20B had the same oil pump.
Thread Starter
Joined: Mar 2009
Posts: 1,385
Likes: 0
From: Whitby
basically no.
the 20B uses unique irons, with unique ports, and it has different through bolts than the 13B's. if you had a mill you could use 13B rear and center irons, but the ports would be weird, and you would need to make an intake.
the 20B uses S5 T2 rotors (same part number), so those work. if you use S4 you would need to rebalance, as the 20B has unique counterweights.
the 20B used unique rotor housings too, but any 86-03 housing will work, the cosmo had a different exhaust port insert designed to let more air pump air into the engine, so it could have a lower and more stable idle.
the 20B used a front cover that is like an S5 T2, so that would swap over.
i believe the FD and 20B had the same oil pump.
the 20B uses unique irons, with unique ports, and it has different through bolts than the 13B's. if you had a mill you could use 13B rear and center irons, but the ports would be weird, and you would need to make an intake.
the 20B uses S5 T2 rotors (same part number), so those work. if you use S4 you would need to rebalance, as the 20B has unique counterweights.
the 20B used unique rotor housings too, but any 86-03 housing will work, the cosmo had a different exhaust port insert designed to let more air pump air into the engine, so it could have a lower and more stable idle.
the 20B used a front cover that is like an S5 T2, so that would swap over.
i believe the FD and 20B had the same oil pump.
I am looking at using
TII rotors, housings, irons, front cover
20b center plate, through bolts, e shaft
custom intake, exhaust, fuel rail
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