RB20DET swapped fc
06-22-21, 12:43 AM
#1
Junior Member
Thread Starter
RB20DET swapped fc
Hello all,
before anyone starts reading this and gets bored or anything i’m posting this in hopes to get more info on a rb swap into a fc. i know all the rbs r kinda similar atleast in the sense that they probably would need similar things done to get them into the car driving all good. anyways, Im new here and am currently considering buying a 88’ fc vert rolling shell. it’s in really good condition compared to my 240sx which i’m selling and was extremely rotted. i’ve got an rb20 that i bought for the 240 but i was in way over my head on that project since it was my first project and don’t really have too much experience with rust work. now i’m more confident but know that it was better to sell that to someone who knew what they where doing better. anyways i’m thinking of buying a shell and putting my rb20 into it and would love to hear any and all information anyone can tell me about the swap. i’ve read some threads about it but haven’t seen any cars that actually got finished or atleast it wasn’t posted so now i’m here posting hoping people will respond and give me some info about the swap so i know what’s going to be needed to be done. i would greatly appreciate anything anyone can tell me about this swap even if it’s just sending me someone’s youtube or contact. it’ll all be helpful i’m hoping but i also would appreciate if people didn’t mention how a rb25 or 26 would be better. i know that don’t need to hear it but i’m just graduating high school now so those weren’t in the price range. same with a sr20 which i would’ve liked but it’s also not in the price range at the moment atleast with the crazy prices they go for now. hope some people can give me some useful information so i can try to figure out what i’d be getting myself into.
Thank you to anyone who respond to this it will be a big help.
before anyone starts reading this and gets bored or anything i’m posting this in hopes to get more info on a rb swap into a fc. i know all the rbs r kinda similar atleast in the sense that they probably would need similar things done to get them into the car driving all good. anyways, Im new here and am currently considering buying a 88’ fc vert rolling shell. it’s in really good condition compared to my 240sx which i’m selling and was extremely rotted. i’ve got an rb20 that i bought for the 240 but i was in way over my head on that project since it was my first project and don’t really have too much experience with rust work. now i’m more confident but know that it was better to sell that to someone who knew what they where doing better. anyways i’m thinking of buying a shell and putting my rb20 into it and would love to hear any and all information anyone can tell me about the swap. i’ve read some threads about it but haven’t seen any cars that actually got finished or atleast it wasn’t posted so now i’m here posting hoping people will respond and give me some info about the swap so i know what’s going to be needed to be done. i would greatly appreciate anything anyone can tell me about this swap even if it’s just sending me someone’s youtube or contact. it’ll all be helpful i’m hoping but i also would appreciate if people didn’t mention how a rb25 or 26 would be better. i know that don’t need to hear it but i’m just graduating high school now so those weren’t in the price range. same with a sr20 which i would’ve liked but it’s also not in the price range at the moment atleast with the crazy prices they go for now. hope some people can give me some useful information so i can try to figure out what i’d be getting myself into.
Thank you to anyone who respond to this it will be a big help.
06-22-21, 03:45 AM
#2
The answer is to not....
1. Wall of text
2. If you couldnt finish an rb swap in an s chassis then you wont be able to do the swap in an fc. Putting an rb in am s chassis is like putting an ls in an fd. It's the most supported and plug and play swap there is.
3. Its expensive. If you dont have AT LEAST 10k on hand, don't bother. It can be done for cheap if your goal is to just get it running and care nothing about anything else but then it wont care about you and will be poop.
Not even in your 20s and you're attempting to do things like this, it doesn't mix. Focus your time and effort and being a productive and useful member of society. Once you have that in progress, revisit this thread.
1. Wall of text
2. If you couldnt finish an rb swap in an s chassis then you wont be able to do the swap in an fc. Putting an rb in am s chassis is like putting an ls in an fd. It's the most supported and plug and play swap there is.
3. Its expensive. If you dont have AT LEAST 10k on hand, don't bother. It can be done for cheap if your goal is to just get it running and care nothing about anything else but then it wont care about you and will be poop.
Not even in your 20s and you're attempting to do things like this, it doesn't mix. Focus your time and effort and being a productive and useful member of society. Once you have that in progress, revisit this thread.
06-22-21, 07:15 AM
#3
Junior Member
Thread Starter
The answer is to not....
1. Wall of text
2. If you couldnt finish an rb swap in an s chassis then you wont be able to do the swap in an fc. Putting an rb in am s chassis is like putting an ls in an fd. It's the most supported and plug and play swap there is.
3. Its expensive. If you dont have AT LEAST 10k on hand, don't bother. It can be done for cheap if your goal is to just get it running and care nothing about anything else but then it wont care about you and will be poop.
Not even in your 20s and you're attempting to do things like this, it doesn't mix. Focus your time and effort and being a productive and useful member of society. Once you have that in progress, revisit this thread.
1. Wall of text
2. If you couldnt finish an rb swap in an s chassis then you wont be able to do the swap in an fc. Putting an rb in am s chassis is like putting an ls in an fd. It's the most supported and plug and play swap there is.
3. Its expensive. If you dont have AT LEAST 10k on hand, don't bother. It can be done for cheap if your goal is to just get it running and care nothing about anything else but then it wont care about you and will be poop.
Not even in your 20s and you're attempting to do things like this, it doesn't mix. Focus your time and effort and being a productive and useful member of society. Once you have that in progress, revisit this thread.
06-22-21, 07:57 PM
#5
Junior Member
Thread Starter
Trending Topics
06-22-21, 08:01 PM
#8
Junior Member
Thread Starter
snd do a different build.
06-23-21, 12:00 AM
#9
Penis Healthy
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will do. on a side note do u have anything useful to ad that could help me? if not it’s fine but i’m young and stubborn so don’t expect me to take ur advice to not do it. i know i could do it just wanna learn some more about it from someone who’s done the same swap or something similar. and it’s not like i couldn’t have put it into my 240 but that thing was insanely rotted so it just made more sense to sell it for more money
snd do a different build.
snd do a different build.
06-23-21, 12:06 AM
#10
Junior Member
Thread Starter
idk where ur from but the drift tax has hit real hard especially in toronto and so i know a schassis would be cheaper but probably would cost more or a little less to get a good condition and then do the swap then it would be to do the fc. idk imma do my thing and if u guys are all right i’ll lyk but i’ll keep track of the total price just for all of u to see what happens lmao. i really just wish someone could give me some info about the swap. ig i’ll just figure it out with the shop that helps me since ik they know what to do and have done majority of the stuff i’d need to do in the past
06-23-21, 04:03 AM
#11
Penis Healthy
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idk where ur from but the drift tax has hit real hard especially in toronto and so i know a schassis would be cheaper but probably would cost more or a little less to get a good condition and then do the swap then it would be to do the fc. idk imma do my thing and if u guys are all right i’ll lyk but i’ll keep track of the total price just for all of u to see what happens lmao. i really just wish someone could give me some info about the swap. ig i’ll just figure it out with the shop that helps me since ik they know what to do and have done majority of the stuff i’d need to do in the past
Standalone ecu
Probably best to use an s13 trans and fab trans crossmember
Custom made driveshaft that adapts from the s13 trans to the FC rear end
NA FC rear end probably wont hold up long so prepare to buy a TII one if you can find it, or go custom rear like Explorer 8.8 IRS.
Either depower PS rack or try to adapt the s13 PS pump with custom lines and restrictors.
Custom oil cooler lines.
Retrofit a s13 radiator or reroute the hoses to accommodate the FC radiator
Odds and ends like catch cans and vacuum lines.
Trying to retain AC? No idea.
Heater hoses should be easy to reroute with a good length of heater hose.
Not sure which side the starter is on, but you may need to fab some battery cables to the starter.
Custom exhaust with wastegate dump or recirc, fitted with bungs for WBO2
Custom intake
Custom throttle cable if the FC one wont work, maybe an s13 cable.
Electric radiator fan with shroud
Aftermarket fuel pressure regulator
Aftermarket fuel pump
Wideband O2 kit
Aftermarket gauges
Custom ground cables
Not sure if the s13 speedo output will work with the FC. If not you will need to find a cable that works.
All the electrical in the FC will work without the front engine harness, except for the windshield wipers. you can unplug it from the connector at the passenger kick panel. If you want to keep the windshield wipers, depin everything from that connector and only leave the 4 wires for the wiper motor.
If you make it through all that all you need is a tune.
That's all I can think of off the top of my head. This is probably the cheapest route, and I'm probably missing a lot of ****. Plan on not passing smog taking this route if you have smog in Canada.
Last edited by FührerTüner; 06-23-21 at 04:31 AM.
06-23-21, 07:43 AM
#12
u may also want to try asking around in the 2nd gen section for those more familiar with the FC
https://www.rx7club.com/2nd-generati...-1986-1992-17/
https://www.rx7club.com/2nd-generati...-1986-1992-17/
06-30-21, 01:39 PM
#13
first ... welcome to the board. 
as requested, here are a couple videos i got from google and a search of the board..
https://www.rx7club.com/other-engine...-build-797346/
https://www.rx7club.com/build-thread...5-rx7-1012361/
https://www.rx7club.com/other-engine...b20-fc-656004/
that should be enough to get you started, if you're serious. there's information to glean and leads to chase down.
okay ... so here is my take on what i've seen in this thread so far ...
whether you realize it or not, these guys are trying to help you. it may not be what you want to hear, but sometimes that's what "real" help sounds like. you mentioned being young and stubborn, and perhaps it's a fair assessment, but while you can't do anything about your age, you CAN do something about being stubborn. that is a choice. you can get a pass on being young, but not willfully being ignorant. if there is a point you'd like to make (or an angle you'd like others to see), then engage in conversation ... this is our forum for that. most of us will never meet one another in real life, so making your thoughts and points in writing is all we have.
please don't take this as me pointing a finger at you, i am merely trying to see if i can get you to take a step back and look at this again. many of the guys here have personal experiences maybe not with RBs, but relevant experiences nonetheless. at the end of the day, whether it's parts, skills, materials, or all of the above, money is one of the most important factors in any build, and scoffing at that fact is a recipe for disaster. some of us have lived it. i'm guessing you have yet to.
either way, i wish you well.
i actually learned that term relatively recently. it's the label the kids use today for taking a year off being graduation and their freshman college year.
as requested, here are a couple videos i got from google and a search of the board..
https://www.rx7club.com/other-engine...-build-797346/
https://www.rx7club.com/build-thread...5-rx7-1012361/
https://www.rx7club.com/other-engine...b20-fc-656004/
that should be enough to get you started, if you're serious. there's information to glean and leads to chase down.
will do. on a side note do u have anything useful to ad that could help me? if not it’s fine but i’m young and stubborn so don’t expect me to take ur advice to not do it. i know i could do it just wanna learn some more about it from someone who’s done the same swap or something similar. and it’s not like i couldn’t have put it into my 240 but that thing was insanely rotted so it just made more sense to sell it for more money
snd do a different build.
snd do a different build.
whether you realize it or not, these guys are trying to help you. it may not be what you want to hear, but sometimes that's what "real" help sounds like. you mentioned being young and stubborn, and perhaps it's a fair assessment, but while you can't do anything about your age, you CAN do something about being stubborn. that is a choice. you can get a pass on being young, but not willfully being ignorant. if there is a point you'd like to make (or an angle you'd like others to see), then engage in conversation ... this is our forum for that. most of us will never meet one another in real life, so making your thoughts and points in writing is all we have.
please don't take this as me pointing a finger at you, i am merely trying to see if i can get you to take a step back and look at this again. many of the guys here have personal experiences maybe not with RBs, but relevant experiences nonetheless. at the end of the day, whether it's parts, skills, materials, or all of the above, money is one of the most important factors in any build, and scoffing at that fact is a recipe for disaster. some of us have lived it. i'm guessing you have yet to.
either way, i wish you well.
i actually learned that term relatively recently. it's the label the kids use today for taking a year off being graduation and their freshman college year.
06-30-21, 01:53 PM
#14
“Gap year”…yeah, I was “schooled” since that post. I was told it started as a means of raising funds and reducing school debt while firming up ideas about a major. Except that most of the ‘gaps’ grow into endless canyons.
No mention in the explanation of getting in over your head on a questionable car build.
No mention in the explanation of getting in over your head on a questionable car build.
Last edited by Sgtblue; 06-30-21 at 01:58 PM.
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