What are the pros and cons of both motors?

with would be over all better to do for an engine swap in to a fc with no engine?

Just doing some research

 

13B-RE pros-

largest intake ports
Better flowing intake manifold at high rpms
Fit into a FC chassis ALOT easier
Less costly to buy

Cons-

stock non-window bearings
70psi oil pressure reg
Weaker, thinner dowel pin castings
restrictive exhaust port sleeves
lower flowing exhaust turbines on turbo's (if using the stock twins)
smaller oil line outet on front cover

13B-rew pros-

Thickest dowel pin castings front and rear
Multi-window bearings front and rear
110psi oil regulator
extra bolt hole for front cover
better more direct trigger system
Better exhaust port sleeves
Better flowing exhaust turbines on turbos
Larger front cover oil line outlet

13B-rew cons-

Slightly smaller intake ports
Harder to fit into a FC chassis
More costly to buy

 

wow very helpful thank you

 

thanks for the help.

 

Waste of time trying to stuff a 13B-REW into an FC.
It's easier to stuff a Cosmo 13B-RE into an FC.
Unless you have "unlimited" fabrication skills and resources?

The 13B-REW is the latest evolution of the turbo 13B.
It does have all the nicest parts, but this is all debatable.


-Ted

 

so what are some part that would be needed for the swap.

and what r some reliable sites to order that parts from?

Thanks

 

Your welcome, I try! You can get the engine mounts for the RE to fit into a FC chassis on ebay. I actually have a friend selling some if your interested. A standalone is needed also, with a upgraded fuel pump ect.

 

I was gonna type out a big old thing but then i remembered this site:

http://fc3spro.com/TECH/SWAP/COSMO/13b-re.html

Should answer most of your questions

 

slight correction:

the cosmo primaries are smaller than the rew primaries. secondaries are the same size.

it's the runners that are bigger.

 

13B ports, 13BT-RE are 87-91, correct me if im wrong here, secondary port end plate runners go straight in to port and smaller than 13BT-REW, which was from 93-98, which are much larger and go at a downward angle about 45* to the port that at factory timing is almost the same as RE port timing. SO!! why did MAZDA do that down angle port?? I was at a NASCAR race shop last week, and they had a new SMOKE port study machine, when they were going to lunch I asked if I could just play with it, well you should see the difference in swirl turbulence as it enters the chamber, the FD port had a much faster and tighter flow and I assume more volume. anyway just another observation about these silly rotarys they are so intriging! THX RON

 

OH yeah! I put an FD engine into an FC back in 98, about 8yrs. ago ,still in there but like normal blew 2 of them out also. my opinion I love em, but they are fragile. must be female! THX RON

 

Wankel, and regular.

 

That made me smile. I have never heard a better quote to describe the FD's REW engine to date.

 

I'm doing the RE-FC swap. Its not hard. Just save your money before you jump into it. I spent about $4k on everything and Im doing my own work. *Note the price includes my Microtech LTX-8, the engine, Exedy light weight flywheel and ACT clutch, tranny, etc. Whereas, a REW will cost you $2.5k on just for the motor.

 

i've had 2 guys have me do cosmo swaps in fc's and both ended up using a hybrid turbo... what a waste of such a good intake system for such little power!

4-500whp can be had on an fc engine, so might as well max that out before you do any crazy swaps.

 

That's all nice and all, but how the ports actually flow are significantly different than how that smoke machine set-up does.
It's just like the old flowbench argument on rotary motors...


-Ted

 

you mean the argument that ignorant people don't think flow matters?

 

I had an RE in my AE TII. I use the REW rotor housing instead of the RE on a recent rebulit. I runs great so far.