RPM Motorsports Half Bridge 13B RE RX-7 Rev and Turbo Spool

so much flutter.... get a bov mate

The BOV was clearly shown in the video, but it was disconnected as the car was only finished a day or two before and the vacuum lines to it had not been run.

whats surprising about that? there are quite a few 400+ HP rotaries... it runs in the family lol

Um, a 3.9 litre rotary? Mazda never made such a thing. The largest well known rotary they made was the 787B Le-Mans engine, and it was 2.4 litre.

4 rotor...i saw on you tube...

If it's based on Mazda parts, and it most certainly is because I doubt anyone would be casting their own rotors and housings, it can be one of two displacements. These are 2.4 litre if based on 12A parts, and 2.6 litre if based on 13B parts.

I believe it's in fact a 2.6 litre called the 26b you are referring to

What is pretty funny is that if you sum all rotors swept capacity over 720 crank revolutions (the same as piston engines), suddenly your 13B is 2.6 liters! Ooops!

But playing by rotary rules instead of trying to put it into piston perspective, it's a 1.3 litre. 2.6 litres is just to make piston people feel better about themselves. :-)

Nah man, I love Rota's. Best engine ever made, I'm just realistic about their capacity.

2 rotors x 654cc = 1308cc.

1308 x 3 (1080 crank revolutions to complete suck squish bang blow) = 3924cc.

Now to divide 3 crank revolutions by 3, then multiply by 2 crank revs (as per piston engine) =
3924 / 3 x 2 = 2616cc

Nice car, BTW!