Red Rotary Rocket

Over the past year or so, I remember reading a lot of speculation about the compression ratio of the upcoming renesis engine for the RX-8. During that time, I read some claims that it would be as high as 11:1 or even 12:1. With the official release of the RX-8 at the Detroit auto show, Mazda has released a lot of data about the new car, and it turns out that the compression ratio for the new engine isn't nearly as high as previously suspected. It will be 10.0:1

Check out this link for some more cool data on the new car and engine.

http://www.media.mazda.com/press_inf...lish/text.html

Bridgeported

All I've heard over the past few years was a 10.0:1 or 10.5:1 compression ratio.

I HATE that number! It's too low for crazy NA power, but too high for good turbocharger or supercharger power! Keep it low (8-9) for turbo or high (11-12) for NA ... only in reference to sports cars.

Scalliwag

I just want to get my Scalli-Paws on some side plates for one of these... and maybe rotor housings. Most likely I could get by without the rotor housings though.

peejay

14:1...

Scalliwag

8:1 and MONSTER Turbo!

peejay

bah.... you can keep your turbos i want to see a super high compression N/A. could you imagine how nasty that'd be? idle all crackly, respond like a motorcycle engine, torque like a much bigger engine, and excellent fuel mileage to boot.

Scalliwag

Actually I would like a really bad *** supercharger setup made especially for it!

blackscorpio

10-1 probably ok for mini me turbo

Wargasm

Hmm swap in some 2nd or 3rd gen rotors, drop a few hundred off the redline, and turbo that beyotch!

Jeff20B

iTrader: (13)

Hey peejay, would it need to run high octane fuel? More or less timing advance?

rxrotary2_7

hmmm... did anyone notice the placement of the water seals? from what i remember of the pic i saw they have been moved back to rotor housings like the old days. this would require cutting for new water seals if you were to use current 13B rotor housings.

rxrotary2_7

rxrotary2_7

this is the part i like.

Jeff20B

iTrader: (13)

Yeah I noticed. There seem to be oil seals now too. I guess that means no more sealant is needed on the lower arm things (above the oil pan). It also looks like at least one tension bolt was relocated. That means using the old style rotor housings would also be difficult.

Does anyone know if the spark plug holes have been relocated? If the depressions in the rotors are the same as the 'B' series engines, then probably not.

ShortBusRiot

Why take a step down? I would much rather have a N/A side port rotary producing close to 300hps than a 450+ hp time bomb.
Just my 2 cents.