SpiceMike

I get a 13b with bad o-rings for free. I am a Ford-technician, but i think that i'm able to repair this engine. If its an improvement i want to lighten the flywheel an porting the Intake.
Anybody can give me some instructions and tell me the improvements i can expect?
Wich mods would you make if your engine is disassembled?

Hope you can read my bad english...Thanks in advance!

cewrx7r1

iTrader: (2)

It is hard to explain porting to the unexperinced. First go to:

http://www.rotaryengineillustrated.c...-ports101.html

Also visit the rest of the site for other info on how the engine works. Working on these ports is similar to working on 2cycle engine ports.

The exhaust ports should be the first to be opened up. Never port the intakes without porting the exhaust. If you look at the exhaust ports and feel them (disassembled engine), you will notice that the inside steel sleeve is actually larger than the opening in the aluminum housing. You grind away the aluminum opening to the same size as the steel sleeve so that the surface is in the same plane as the sleeve's surfaces. In other words,
extend the steel sleeve opening through the housing.

Just doing the exhaust will improve power without changing the torque curve very much.

Porting the intakes depends more on which 13B you have, and how much power you want to go after. The more you port the intakes, the more racy the torque curve will be.

Porting will increase power along with the requirement that the fuel and ignition timing systems also be modified.

SpiceMike

It's a TwinTurbo 13B of a '93 FD. The link above is very helpful, thanks! I dont know its possible to lighten the stock flywheel, or have i to buy an aftermarket steel or aluminium? On stock the counterweight ice one-piece with the flywheel, on aftermarkets its separate.What should i do, and is it worth to do....?

Red Rotary Rocket

I think a light flywheel is definately worth doing. Drivability is barely affected, but the engine revs so much more freely. Acceleration in first and second gear get a really nice improvement from lightening the flywheel. I was very happy with the mod.

cewrx7r1

iTrader: (2)

It is not worth lightening the stock flywheel. It will be cheaper to buy a lighter flywheel and stronger clutch as a package deal. It would also include the counter weight and hardware.

For ecu upgrade for fuel and boost, it would be better to get the Apexi PFC. There are many free maps for it posted under the PFC forum

SpiceMike

Today i've disassembled the whole engine, i saw that the rear rotor-housing has some scratches in the middle, they start at the hole for the trailing plug and go to the exhaust port, i could feel them. The apex seals are a little scratched too, 1cm width in the middle. Think is better replacing them..? The Rotors are very carbonized, it seems to be easy to make them clean, or should i be careful?

twan

iTrader: (2)

You should post some pics of what you found. The guys here have almost all been where you are and I'm sure they can, after seeing what you have to work with, advise you as to the best course of action.

mquraish

iTrader: (1)

4 year old thread - wonder what happened to spicy mike since then.

Cgotto6

iTrader: (8)

What the **** is with these old threads. Im getting sick of reading through these then realizing that theyre 4 years old.

RotaryEvolution

iTrader: (30)

ditto^

jeremyb

Lol

CantGoStraight

I guess since some of can't post new ones we get to ammuse ourselves with this old stuff. ! ! ! LOL