sizes of apex seals?
#1
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sizes of apex seals?
ok, here's a question that poped up from my head just now.
I've known that ppl are using different sizes of apex seals, like 2mm or 3mm seals, but what's the differences between em? I suppose that 3mm is stronger than 2mm because of the size?
maybe a trivial question for you. I would have done a search if I could.
I've known that ppl are using different sizes of apex seals, like 2mm or 3mm seals, but what's the differences between em? I suppose that 3mm is stronger than 2mm because of the size?
maybe a trivial question for you. I would have done a search if I could.
#2
Old [Sch|F]ool
3mm 2-piece seals were stock from '74-85, 3-piece 2mm seals were stock '86-present. (No idea what the RX-8 engine has)
If you're building up an '85-earlier engine, you really don't have a choice but to run 3mm seals. I ain't even touching the 2mm vs. 3mm debate
If you're building up an '85-earlier engine, you really don't have a choice but to run 3mm seals. I ain't even touching the 2mm vs. 3mm debate
#3
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so, let's say I am gonna work on the FD, so I have the choice either go with a 2mm seal or a 3mm seal.
I know 3mm is good, but how different it makes from a 2mm?
I know 3mm is good, but how different it makes from a 2mm?
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the apex seals are 80mmL (70 for 12a, 60 for 10a) x about 7.5-90mm tall (this is the wearing demension) and either 2 or 3mm wide. to make things complex mazda didnt only change the width of the seal they changed the design of the 2. the fd comes with the 2mm seals and to put 3mm seals in means you have to machine the rotors from 2mm to 3mm. unfortunatly the size and straightness of the apex seal grooves is very important.
mike
mike
#5
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Originally posted by j9fd3s
the apex seals are 80mmL (70 for 12a, 60 for 10a) x about 7.5-90mm tall (this is the wearing demension) and either 2 or 3mm wide. to make things complex mazda didnt only change the width of the seal they changed the design of the 2. the fd comes with the 2mm seals and to put 3mm seals in means you have to machine the rotors from 2mm to 3mm. unfortunatly the size and straightness of the apex seal grooves is very important.
mike
the apex seals are 80mmL (70 for 12a, 60 for 10a) x about 7.5-90mm tall (this is the wearing demension) and either 2 or 3mm wide. to make things complex mazda didnt only change the width of the seal they changed the design of the 2. the fd comes with the 2mm seals and to put 3mm seals in means you have to machine the rotors from 2mm to 3mm. unfortunatly the size and straightness of the apex seal grooves is very important.
mike
#6
Laying Down Rotary Law
theres a company in canada that makes
2mm, 3mm, 3.5mm, 4mm and 6mm Apex Seals
http://www.rotaryengine.ca/
2mm, 3mm, 3.5mm, 4mm and 6mm Apex Seals
http://www.rotaryengine.ca/
Last edited by kabooski; 03-16-02 at 12:28 AM.
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it really matters how you machine the apex seal grooves
mike
mike
#10
Rotary Freak
it's a give and take
Originally posted by Jordan
so, let's say I am gonna work on the FD, so I have the choice either go with a 2mm seal or a 3mm seal.
I know 3mm is good, but how different it makes from a 2mm?
so, let's say I am gonna work on the FD, so I have the choice either go with a 2mm seal or a 3mm seal.
I know 3mm is good, but how different it makes from a 2mm?
#13
Old [Sch|F]ool
WOW ancient thread
The apex seals do not factor into the balance of the rotating assembly. Their weight is supported by the rotor housing, not the eccentric shaft.
The apex seals do not factor into the balance of the rotating assembly. Their weight is supported by the rotor housing, not the eccentric shaft.
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