zoom44

interestingly - the over all size of the engine has only increased marginally and weight has decreased while they have managed to increase the internal volume and stroke substantially.

OD mention the longer flame front. intuitively the longer and narrower combustion chamber would lead to less efficiency. but they have dealt with that by reshaping the bath tub so that the overall effect is actually more "square" than the current motor.

has anyone heard the compression numbers?

Rootski

iTrader: (1)

I would be very surprised if this was ready for the market by 2010.

BMonkey

Copied this from a Japanese website

10A
e=15mm
R=105mm
b=60mm
Vh=491cc

13A
e=17.5mm
R=120mm
b=60mm
Vh=655cc

12A
e=15mm
R=105mm
b=70mm
Vh=573cc


13B
e=15mm
R=105mm
b=80mm
Vh=654cc

プロトタイプ

12A'（12A量産前に検討されたエンジン）
e=16.4mm
R=112mm
b=60mm
Vh=573cc

21A
e=18.5mm
R=128mm
b=85mm
Vh=1046cc

22A
e=18.5mm
R=128mm
b=95mm
Vh=1169cc

15A
e=15mm
R=105mm
b=90mm
Vh=737cc

And their guess for 16X is

16X
e=17.5
R=122.5
b=70
Vh=797cc

BMonkey

Another clipping I dug up with a little bit more information than the computer screens from the show.

LionZoo

I'm wondering if they're going to find a way to lower the engine even more in the chassis. With the increased displacement and taller positioning of the eccentric shaft we're looking at a pretty high transmission tunnel.

Rotary Rasp

iTrader: (2)

Great information. Why can't the 16X rev as hard as the current 13B?

xsnipersgox

my guess would be a bigger rotar though thinner, has more moment of inertia that the center has to overcome, so at too high of a rev, it wold put too much stress on the center rod.. thingy.. man i fail at this and i am a freaken ME

frollo

is it just me, (speculation) or will having different metals next to each other present the same problems many of the other earlier rotaries have? i don't know if this thing is going to be all aluminum but i remember hearing about the iron/aluminum ones having issues because the two metals stretch and shrink differently leading to leakage and breakdown. I hope this doesn't make that same mistake this thing looks sweet!

LionZoo

My guess is the lower revs has as much to do with tranny and peripheral mechanism preservation as anything to do with the engine.

zoom44

current plates adn housing are of different materials. 16x will be all same material

elysium19

iTrader: (1)

"A mazda planning exec says....it won't be ready until the early teens" <-- yeah that sounds more likely, especially with the complexities of direct injection in a rotary (there is a REALLY good technical discussion about rotaries and direct injection at https://www.rx8club.com/series-i-tech-garage-22/advanced-renesis-tech-99617/)

Actually, I'm probably the only person who's happy about this. I finish med school in 2012, start making some good money by 2014, and then BAMM get a nice new 16X-powered RX-8/9/10/whatever they'll be up to by then. Rotary power for life!

FloppinNachos

hopefully the 16X will be in a new RX-7.

Razz1

Lighter engine, drop car weight by 300lbs and......................

HiTMaNN

Begin the true sexy time...

BMonkey

I'm just hoping they use piezo injectors. The injectors on there right now look like regular fuel injectors mounted into the housing...

Piezo would be pretty gangsta.

Oh and while we're ripping off stuff, lets take the same aluminium/magnesium alloy that BMW used for their 3.0L N54B30 block and make the side housings out of that!

And how about a nice shiney forged magnesium inlet manifold? That'd be nice.

And lastly Santa....how about a nice big magnesium bell housing for the transmission.

fmzambon

If I remember correctly, the overall engine diameter remains more or less the same as the current 13b. So, I don't think that the eccentric shaft would be higher.

And, in any case, there is always the possibility of relocating the oil pan, which would allow to lower the engine a little bit.

FloppinNachos

dry sump?

I only sort of know what that means...

Like I get the concept, I'm just not sure how to implement it on a rotary?

dillsrotary

any info as to what PSI the fuel injectors are?

nycgps

iTrader: (1)

I would rather give Mazda more time to test them than rushing this thing to the market.

They really need to be real careful about it.

BMonkey

This wouldn't be a big leap, The oil pump is already already driven via chain, it would just need to be enlarged to account for the additional amount of oil required to fill the longer lines. Moroso has a nice little article on it, if you can stomach pistons

http://www.moroso.com/articles/artic...mpSystems.html

Are you sure you want PSI? Not CC? As far as PSI, this all depends on the direct injection set up that they choose and hasn't been done yet.

musclecarconvrt

Need, want, need, want, need

If they are planning to release his in 3-5 years time, the very least they could do would be to offer a conversion kit for our RX8s as payback for the mulligan service a lot of us have received. Build it Mazda and we will buy!

FloppinNachos

There are a lot of electrical/computer conflicts for them to offer a kit with any kind of reasonable price.

Huey52

iTrader: (2)

This is a good thing (as it is in our present engines). The dissimilar expansion properties of the metals ensure anti-seizing even if all the oil were lost.

ezrider55

I wonder how much torque that big rotor produced.
Looks like I'm traden in 10!

bigireland

lovely..