Difference between Fd and FC TII rotor housings
03-22-05, 12:46 AM
#1
Drive.
Thread Starter
Join Date: Oct 2002
Location: Washington, North Carolina
Posts: 1,676
Likes: 0
Received 1 Like
on
1 Post
Difference between Fd and FC TII rotor housings
Like the title says...what are the differences between the FD rotor housings and the FC TII rotor housings?
03-22-05, 02:05 AM
#2
No coolant passage to the manifold (for the turbo coolant feed) on the FD rotor housings. minor changes in spark location (timing). The FD housing's chroming process is much better than the FC. Maybe a minor difference in the exhaust port, but I don't think so.
Hope that helps.
Hope that helps.
03-22-05, 02:33 AM
#3
I live in an igloo
Join Date: Jul 2004
Location: calgary alberta
Posts: 2,546
Likes: 0
Received 0 Likes
on
0 Posts
Yea I've been told several times that they are interchangable, except of course for features mentioned by duncan.
They are superior to the FC housings, and IMO are worth the extra money for longevity reasons.
They are superior to the FC housings, and IMO are worth the extra money for longevity reasons.
03-22-05, 12:09 PM
#5
Drive.
Thread Starter
Join Date: Oct 2002
Location: Washington, North Carolina
Posts: 1,676
Likes: 0
Received 1 Like
on
1 Post
I was asking this to really find out if they could be used for rebuilding an s4 tII engine.
Anybody ever done this? Ever used fd housings with s4 tII rotors ?
Anybody ever done this? Ever used fd housings with s4 tII rotors ?
03-22-05, 01:13 PM
#6
Originally Posted by X-JaVeN-X
I was asking this to really find out if they could be used for rebuilding an s4 tII engine.
Anybody ever done this? Ever used fd housings with s4 tII rotors ?
Anybody ever done this? Ever used fd housings with s4 tII rotors ?
--Fritz
Trending Topics
03-22-05, 01:31 PM
#8
Originally Posted by X-JaVeN-X
I was asking this to really find out if they could be used for rebuilding an s4 tII engine.
Anybody ever done this? Ever used fd housings with s4 tII rotors ?
Anybody ever done this? Ever used fd housings with s4 tII rotors ?
Yes. But if you're using a stock turbo you'll have to get creative for a coolant feed.
03-22-05, 04:13 PM
#9
Drive.
Thread Starter
Join Date: Oct 2002
Location: Washington, North Carolina
Posts: 1,676
Likes: 0
Received 1 Like
on
1 Post
right now it's an 88 motor just pulled apart with 2 bad housings. I know I'm gonna use s4 rotors...however it will be an s5 turbo. I was asking just in case i found a good set of fd housings before I found a good set of s4 or s5 housings. So any of you guys that have used fd housings...what did you do to resolve the coolant issue?
03-22-05, 05:52 PM
#10
Full Member
Join Date: Jul 2004
Location: Calgary Alberta, Canada
Posts: 127
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by C. Ludwig
Yes. But if you're using a stock turbo you'll have to get creative for a coolant feed.
Actually..you can just machine out the plug and use them like a tII housing. Its really easy.
03-22-05, 06:53 PM
#11
Lava Surfer
Join Date: Mar 2002
Location: Kailua, HI
Posts: 2,354
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by gotrotors?
Actually..you can just machine out the plug and use them like a tII housing. Its really easy.
Last edited by bingoboy; 03-22-05 at 06:57 PM.
03-23-05, 04:05 AM
#13
I live in an igloo
Join Date: Jul 2004
Location: calgary alberta
Posts: 2,546
Likes: 0
Received 0 Likes
on
0 Posts
They're all the same. As long as the displacement is the same, then the housing should be the same. It wouldn't make sense for mazda to spend more money manufacturing a different housing for an engine, it saves them machining parts and of course manufacturing costs to create just one size of housing.
Thats why the NA's and FD's have the plugs on the housings, cause they're all from the same cast, just modified with plugs depending on what kind of car they are going into.
In other words, Cosmo 20B housings should work no problem.
Thats why the NA's and FD's have the plugs on the housings, cause they're all from the same cast, just modified with plugs depending on what kind of car they are going into.
In other words, Cosmo 20B housings should work no problem.
03-23-05, 05:34 AM
#14
Savanna Rx-7
not trying to rain on any parades, but there are several differences in the castings on the rotor housings and the side housings from model to model.
the cosmo rotor houseings are basically worthless due to the size of the exhaust inserts, ya you can change them out, but if you are looking at used houseings to replace your S4 then go for the FD. the best chrome, the best inserts, will have to drill out the spot for the coolenat flow, no problems.
the cosmo housing would require changing the inserts, which means either getting a set of FD houseings anyways, or using the inserts from the S4. since you are doing a rebuild why waste time and money just get the FD housings.
kenn
the cosmo rotor houseings are basically worthless due to the size of the exhaust inserts, ya you can change them out, but if you are looking at used houseings to replace your S4 then go for the FD. the best chrome, the best inserts, will have to drill out the spot for the coolenat flow, no problems.
the cosmo housing would require changing the inserts, which means either getting a set of FD houseings anyways, or using the inserts from the S4. since you are doing a rebuild why waste time and money just get the FD housings.
kenn
03-25-05, 08:27 AM
#20
Savanna Rx-7
Originally Posted by RexRyder
so a stock cosmo engine isnt good or what
Eeees Ok meyann but its butthole is to puckered up! if it had a looser butthole it would run faster meyan.
Like I said the rotor houseings exhasut port is crappy on that motor, where it shines is the intake ports, its ports are like ginormous and taper down nicely to increase the speed as it exits into the rotor housing, so you really get a good intake charge and then the rotor hoseing screws the pooch. mazda wanted people to buy the 3 rotor, if they made the 13b model put out similiar HP then your average consumer would say "**** its only got a couple more HP why not buy the cheaper 13b model" they wouldn't understand the difference the torque makes.
wanna make a killer engine for the FC? take the cosmo 13b irons, use FD exhaust housing with FD rotors, and journal shaft. thats the hot ticket for stock parts, port it and get more.
kenn
03-26-05, 10:22 AM
#21
Originally Posted by kenn_chan
Eeees Ok meyann but its butthole is to puckered up! if it had a looser butthole it would run faster meyan.
Like I said the rotor houseings exhasut port is crappy on that motor, where it shines is the intake ports, its ports are like ginormous and taper down nicely to increase the speed as it exits into the rotor housing, so you really get a good intake charge and then the rotor hoseing screws the pooch. mazda wanted people to buy the 3 rotor, if they made the 13b model put out similiar HP then your average consumer would say "**** its only got a couple more HP why not buy the cheaper 13b model" they wouldn't understand the difference the torque makes.
wanna make a killer engine for the FC? take the cosmo 13b irons, use FD exhaust housing with FD rotors, and journal shaft. thats the hot ticket for stock parts, port it and get more.
kenn
Like I said the rotor houseings exhasut port is crappy on that motor, where it shines is the intake ports, its ports are like ginormous and taper down nicely to increase the speed as it exits into the rotor housing, so you really get a good intake charge and then the rotor hoseing screws the pooch. mazda wanted people to buy the 3 rotor, if they made the 13b model put out similiar HP then your average consumer would say "**** its only got a couple more HP why not buy the cheaper 13b model" they wouldn't understand the difference the torque makes.
wanna make a killer engine for the FC? take the cosmo 13b irons, use FD exhaust housing with FD rotors, and journal shaft. thats the hot ticket for stock parts, port it and get more.
kenn
03-26-05, 11:13 AM
#23
Originally Posted by JDuncan
No coolant passage to the manifold (for the turbo coolant feed) on the FD rotor housings. minor changes in spark location (timing). The FD housing's chroming process is much better than the FC. Maybe a minor difference in the exhaust port, but I don't think so.
Hope that helps.
Hope that helps.
Thread
Thread Starter
Forum
Replies
Last Post
cdn
2nd Generation Specific (1986-1992)
14
09-10-15 06:23 AM
cdn
2nd Generation Non-Technical and pictures
0
08-11-15 08:59 PM
