Hi guys.....i was thinking if anyone has tried to swap fc rear axle to his fb.......the reason is that if i will do this,i can use fd torsen and....

 

Hopefully this helps:

https://www.rx7club.com/showthread.p...C+rear+axle+FB

 

Hell of a lot of work just to gain a merely OK, limited slip diff...............

 

gotta remember you're talking to the guy that has nothing better to do jk ...

 

If it's merely a torsen you want just put one in the 1st gen. rear.

 

......i own a 83' now......i can't find a 85' axle.....but i'm confused.....can i put torsen in a 85' axle or only lsd?

 

Guru torsen

 

You can put in a torsen from a 1994+ Miata into the S3 84-85 rx7 large axel rear end. But you cannot do this to the S2 80-83 small axel rear end with out other modificaions.

Here some more info:
http://members.aol.com/solomiata/Drivetrain.html


If they still have any of these left I would get one, but I think they stopped making them but it would hurt to check. You still can only use this in the S3 84-85 rear end. You can also get a Kazz LSD for the S3 rear end.

 

 

......thanks all you guys......

p.s.i have many things to do, but nothing better than working in my 7.....

 

.......ok,lets say that i own a fc rear axle,i own a fd torsen too.....i don't mind if the wheels run out of fenders....(i will do this anyway....)will i have any problem to fit the fc axle?

 

Define problem......

The FC doesnt really have an axle....its IRS.The rear suspension and drivetrain is supported in a subframe,which needs to bolt to the unibody.It also uses struts in the rear,for which there are no adequate towers to affix to,on the stock 1st gen chassis.Youll basically have to gut and rebuild most of the unibody behind the seats,so "create" the mounting points for the FC rear subframe and suspension.

Its been done(once),but its a big undertaking,and the FC rear suspension is not all that great anyways.

 

thanks,i heard about bad fc suspension again.......

 

Installing irs in a 1st gen is major work, cutting out and reinforcing the unibody, getting everything lined square with the body so it will track correctly, etc. I have doubts that the benfits are worth all of the custom work.

Honestly, it would be much easier to upgrade the the rearend to Ford 8.8 and going with a panhard or 3-4 link setup to maintain handling and cornering characteristics. The nice thing about the Ford solid axle is there are more gear options availible and they are less than 1/2 the price of the Mazda ones.

 

isn't that heavy?

 

Heavier than the stock 1st gen axle, yes, heavier than installing the comp0lete 2nd gen irs, along with the unibody reienforcement needed, probably not.

Everyone worries about the extra weight they gain going to a Ford rearend, but that's where you want the extra weight when pushing over 350 hp. Better traction on launch and hopefully less snap oversteer if setup right. Added weight is not always a bad thing, if it's in the right place and saves on replacing parts frequently due to breakage.

 

you are right...i'm gonna use the ford axle....do you think they can make it for 4x108 wheels for me?

 

Well, considering the 4X108 is a Ford pattern, you simply need to find a rear end with that pattern. I'm not sure if they came on the 8.8 rearends or not. Personally, you would be better off going with the 5X114.3/4-3/4" pattern, which is stock on some Fords and all the 5 bolt 2nd and 3rd gens. With your hp goal, you should do ReSpeeds big brake upgrade kit for the front. The 5X114.3 pcd will give you one of the most popular bolt patterns used and huge choice of aftermarket wheels.

 

i'm gonna use rx8 front brakes but i don't want to change my new wheels again.....and they are 4X108.....

 

rx 8 frnt brakes? y not get em all around? it would give u a better braking balance.

 

now that would be interesting. Rx-8 brakes on a FB... hmmmm.... How much would the hardware rack up to be?

 

Definitely stay with a solid rear end. The amount of work and time necessary to get the FC rear end in there wouldn't be worth it in the least. A good three or four link setup out back would be sufficient enough. The Ford 8.8 inch would be ideal for huge horsepower.

Pretty much everything Trochoid said, go with. I forgot the reason I was actually posting a reply, but just listen to Trochoid.

 

i own only the front rx8 brakes....a friend upgrade his rx8 brakes buying grex 4-pistons...the cost for the swap was high enough but now i can use any brake that fits to rx8......pics here....: https://www.rx7club.com/showthread.p...6&page=4&pp=15

i will go to ford 8.8 i'm sure now.....thanks trochoid....

 

You're welcome, now take a break on buying parts and start getting that car put together, lol.

 

i don't have any time yet.......soon......