I thought both intake and exhaust ports were significantly bigger?



EDIT: On the FD....

 

they are, but if you look at it, they are also higher in the engine, cause the intake makes a sharper turn into the engine

 

Just do a TII swap....much easier and less expensive. You can upgrade the upper manifold and throttle body from an FD If you want. That is my next step. Check my recent post and pictures on my conversion.

 

Oh ok, I'm dense, you lost me there for a sec.

 

http://www.mazdatrix.com/c-2.htm



if you scroll all the way down, its hard to tell from the pic, but theres a pretty good mismatch between the fc and fd primaries

 

Hmm.... do tell more about these FD-into-FC kits... where would I find one?



My friend Eric is planning this swap because he's gotten the 13b-rew at an incredible "you can't pass this up" price including transmission, stock turbos, ECU and an uncut wiring harness. We *know* it's going to be almost more trouble than it's worth but it's the kind of thing that is unique and when you're getting the engine at rock-bottom deal, you can't pass it up.



Stuff we've figured we'll have problems with so far:



- Mounting the engine because of the rear mounts

- Wiring, of course. Considering possibly mounting a standalone system, but if we can get away with jerry-rigging the stock ECU for the time being we will.

- Rear end will need to be swapped out in favor of something that can handle the power. DirectFreak on rx7club.com has managed to get a Ford 9" rear into his with some modification, we're thinking of using that

- Fuel system will need total revamping. The 3-6psi setup the stock 12a uses just ain't going to cut it.

- Clutch is pull style not push style, this is going to take some figuring out. Someone mentioned that an aftermarket flywheel and clutch setup from another engine might do the trick... We can always ditch the tranny for something else if need be, but would rather not, obviously

- Shifter is going to change locations, but we don't mind doing that one

- Custom driveshaft, we've got a local place for it.



So what I was thinking... when someone mentioned an FD-into-FC kit... The FC has front mounts, and RB sells a bracket that helps mount a TII engine into a 12a FB chassis. I figure with those two kits, some creative welding and some lateral thinking we might be able to get away with it without too much trouble.



C'mon guys, more brainstorming.. what would it take to mount this engine (which we already basically have) into the FB (which we also have). Anything is do-able with enough determination, but we just don't have enough information!



Jon

 

Sit down with the pin outs of the FD ECU and the wiring diagram of the FB. Figure out which ECU pins are external (power, ground, etc...) which go to the sensors (should be part of the engine harness. Decide which sensors of inputs you don't care about, like is the A/C or power steering pump on. You may be amazed at how few wires are external to the engine harness... Key part is to take your time, be **** and check everything twice...

IMHO you don't a Ford 9" unless you're going to modify the engine for lots of power... you plan to use a clutch w/o springs (why?)... you're building a drag car... or don't know how to drive... The larger '84/'85 should do...

Something like an external Bosch 61975 and new fuel lines. The '84/'85 SE tank has a anti slosh chamber around the pick up and larger fuel lines.

the easiest part...

The FB uses front engine mounts. The FC uses center mounts. The FD uses rear mounts... Changing to an SE front cover and crossmember (or RB mount) is the easiest mounting solution. You won't be able to use the electric OMP though, but you'll need to fool the FD ECU to keep it happy...



BTW the RB mount is for a 13B into a 12A chassis. It expects a pre-'86 front cover.

 

if you want better steering do the front suspension swap from an fc, then use the fd into fc kit to make it work.

 

Anybody documented this? Pictures please?

 

one issue I see right away is track...

The 1st gen is 55.9" and the 2nd gen is 57.1"...