so who is going to build a 16X junior and put 12A rotors into a renesis engine?

 

funnily enough, i never even gave it a thought, but that would definitely be heaping helping of coolness.

 

now that i've given it some thought, wouldn't there be an issue with the 12A side seals and the Renesis ports?

 

how much worse can it be than Renesis side seals?

 

12A side seals are thick. They might work. But what about the early opening port timing? Will it swallow a side seal in the old location? I know renesis side seals were moved more outward.

 

You'd also have to machine the rotors for the scraper/oil O-ring protector, no?

 

Oh man would I love to do a 16x swap in the FB.. someday

 

But why?

 

hmmmm...... I may have to look into this. Got me curious

 

from the 2 or 3 sources i've read that i actually believe to be credible, i was led to believe what Jeff said. the seals were moved outward on the rotor itself and they would now physically be in jeopardy because of when the Renesis ports open.

to put another way, you can use the Renesis rotors in older engines, but you can't (or shouldn't try to) use the older rotors in Renesis-based engines.

most definitely.

 

boooo... well at least the Rx8 rotor housings have the coolant seals in the right place!

 

The most obvious reason is because a 12A sized Renesis, even if just derived from the 4 port low power model, should produce over 165hp without adding weight or shifting balance. If the 6 port high power model was used as the basis for the 12A Renesis, then the output would be even higher (203hp).

Assume the 13B size Renesis, at approximately 80 cubic inches, and 190hp for the 4 port model (just to make such a hybrid a little simpler). Divide 190 by 80. Then multiply the resulting number by 70 (the approximate number of cubic inches of the 12A). The result is 166.25. Based on Mazda's rotor width research that led to the 16X, it is likely that the actual output will be a trifle bit higher, as Mazda learned that the expanding gasses reach the side housings better with the 12A and 10A widths than the 13B widths; but let's assume the worst case.

The biggest hassle I see with this is the rotor housings themselves. Either someone has to figure out how to shave the width of the Renesis housings to 12A dimensions or custom housings would be needed.

In an FB (even in an NA FC), this would be a nice improvement over the stock engine.

 

For the hassle involved, I'd strongly recommend someone go all out with custom billet rotors.

 

what i want to see is both the intake and the exhasut with Semi PP i wonder what that would do for power?

 

I think 6 port reni irons with 12a housings (semi-pp exhaust, side port intake) might be interesting. Definitely sleeves in.... is there a difference in timing between 12A years? I'd think the least amount of timing on the peripheral exhaust would be the way to go building that engine (if the side seals would work)

 

I would say Reni front & rear Irons, GSL-SE Middle Iron, 12A Housings, Early(76-82) 12A Rotors. Side seals will work fine as we already placed 13B Turbo II Rotors on Reni with GSL-SE Housings with no problems.

 

very interesting ... considering I have a rene sitting on the dolly in teh garage and plenty of 12A irons around hmmmm