RX7 engine query

[RemarkLima]

If you think of the engines as plates sandwiched together, the bread being the side / end plates and the filling being the rotor housing and rotor.

The 13b is a club sandwhich, so 2 sets of filling between 3 slices of bread.

The 3 rotor 20b is a mega club sandwich, so 3 fillings in between 4 slcies of bread, with the 4 rotor being a huge sandwich (of just a normal one for our American coursins) with 4 fillings and 5 slices of bread

I guess there\'s no reason you can\'t add more other than the eccentric shaft (same job as a crank shaft) will start to get weaker and more likely to crack the more you add, the same as a crank shaft rarely goes "longer" then 6 cylinders (an inline 6, while a V8 is only 4 cylinders long IYSWIM).

That\'s the best way I can see of visualising it anyway

[sadgoth]

one other question I\'ve been looking around at tuning these rotary engine an a few times I have come across people owning 4rotor or 3rotor an I cant seem to understand exactly what they are meaning an any1 help?

As RemarkLima said it refers to the number of rotor housings and also therfore the number of rotors. Very few 4 rotors out there, Carl has one.

It is like having more cylinders in a piston engine.

3 Rotor engines are found in some of the Cosmos and these engines are referred to as a 20b as opposed to the 13b in the rx7

advantages are the engines produce more power and a lot more torque

[jag60dog]

ahhh  ok im starting to understand now lol.