I might be buying an FD rolling chassis and I was curious about a few things regarding swapping the FC turbo II tranny and rear end into a 93.
1. Would the FC tranny cross member be a direct bolt in on the FD chassis, and if not, can the FD cross member mount to the FC tranny?
2. Does the FC rear end match up with the FD?
3. Would the FC or FD driveshafts work, or would I need to have a custom shaft made?
4. Does the FD have an electronic speedometer, and if so, how would I adapt the FC tranny's mechanical signal?
5. Any other points of concern I'm not hitting here?
Thanks guys!

 

Bump, No one knows anything about swapping to FC parts? I thought it was pretty common considering the FC stuff is stronger.

 

The FC engine and trans will not even come close to bolting into a FD. It is not a good conversion.

In the realm of "is it possible"? Sure anything is possible, people put V8s in FDs so I'm sure you could get the FC motor and trans in there. The FD does not have a tranny mount. The FD diff bolts up completely different than the FC diff.

The FC has motor mounts in the center of the motor, the FD has motor mounts on the rear of the motor. They are different man, way different.

 

I am just wondering why you would want to? I'm guessing its just because it is cheaper?

~Luke

 

Mainly because it is cheaper. I never wanted to put the FC motor in though.

 

No, no one would ever seriously consider it. There's a difference.

The only parts from the FC that I've ever heard of anyone swapping into an FD are the '86-'87 manual steering rack, and the Turbo II differential unit, not the entire differential housing.

 

Why in the heck would you want to do something like that?! If your gonna get an FD chasis regardless of how much money you have you should only be putting engines that belong in it....in it. And also I don't think its a great idea to be buying an FD chasis, even if it has no motor and you were thinking of putting an FC motor in there, if you are running low on money which is what is pretty obvious if you want to do an FC swap cause its cheaper and you don't want to.......OK, I'm done flaming you can continue.

 

My statement holds true that I have never met a nice FD owner. When did I say I wanted to put an FC motor in the car? I actually planned on buying an RZ motor, but never did I say anything about a turbo II engine. So you also disagree with people that swap 20B-REW's in FD's? What about 13B-RE's? Sure they make less horsepower stock, but they're capable of more than the REW.

 

My mistake, you are right about the differential.

 

My mistake on the engine part. As for you not ever meeting a nice FD owner, huh? Who wasn't nice? Maybe the common thread in you not meeting a nice FD owner is YOU.

 

I've met a lot of them. I've only met one that wasn't an elitist ***** who was totally stuck up about his car. I generally don't get the time of day when I try to have a nice rotary discussion with most of these guys. I'm not saying you are all jerks because I know better than that... I just dont appreciate the extent of the criticism I've taken for this thread. It is totally uncalled for.

 

Maybe FD owners don't like the idea of someone turning an FD into an FC just because they're trying to save a buck...

I think most would rather you did an LS1 conversion on the car than put FC running gear into it. That's a step backward, not forward.

 

My mistake, I thou8ght you wanted to swap in the FC engine into it. That's why I kinda flamed you so much. If it makes you feel better I can say I'm sorry.

I don't disagree with any GOOD rotory swap, I love the 20B swap. Even the 13B-RE is good, but of course this is only my opinion. I never said you had to listen to me so why should anyone care about what I say if they don't like it?

 

You need to meet a few who are real RX-7 freaks, one's who've owned both an SA and FC for many years in addition to an FD (like myself) I had an FC for 10 yrs and I thought it was a great sports car.

It's not just the turbo and the sexy bod which make the FD a '7'. These are the same people who bash the new '8'. Unfortunately many of the bashers are also posters - there are a lot of other friendly folks in 'ghost' mode reading these forums who need to chime in once in awhile

Flame suit on

 

Don't listen to the flamers. I understod your question from the get-go. If I were you I would just stick with the FD tranny (as it is pretty bullet proof) and go with the T2 clutch pack LSD since it is a bolt in replacement. Do a search for Vosko threads, he is pretty knowledgable about rear ends.

-Rob

 

This is untrue. The series 4 FC diff and tranny have been proven to support more HP than their series 6 FD counterparts (not huge margins, but enough that people swap to at least the diff when they make a lot of power. I could have sworn there were several who were running S4 FC trannies) . Maybe an RZ tranny would be stronger even than that, but that's an extra $600. I've still yet to have anyone answer my question about whether the FC Tranny will work, or can be easily adapted, but I doubt I'm going to get a straightforward answer.

I agree that the Turbo II engine would be the wrong idea, which is why I wouldn't do it. As stated above, though, the FC tranny (maybe) and diff can be a worthwhile swap. I'm listening to everyone that gives me CONSTRUCTIVE criticism, I just wish I wasnt getting all of the BS criticism.

I find that all of my fellow FC owners are very supportive with everything... I rarely get flamed, but that might just be the board I'm from... I dont post on RX7club, and only came to get FD opinions. The one nice guy that I met was a racer that had owned a bunch of RX-7's.

Thank you for a friendly suggestion. If I get the car (which belongs to vosko... hope he doesent mind me saying) I suppose I will get the FD tranny since I have had no positive feedback that it will work. I may just take a look at one of my friend's FD's to form my own opinion, but for simplicity's sake, the FD tranny would probably go in. As for the Diff, I was only really interested if the entire assembly would bolt up, which I was totally wrong about. I'll just need to find a decently priced FD rear end now.