your forgettign one thing tj. Althouth they will be going into mass production, its probably the rotor housings for the renesis that will be mass produced. they rotor housing will only work with the renesis, becasue of the lack of peripheral port exhaust. I dont think that would drive down the prices of rotor housings for older engines however, which sucks because new rotor housings cost a good chunk of change.

I suppose you could use the new plates to make a new motor, but good luck trying to find intake and exhaust manifolds for it.

the intake port sizes would have changed for sure, so I dont think our surrent manifolds would work.

It would be interesting to see what people can come up with with renensis parts rediliy available.

 

If you want to see it in action go see the X-men 2 movie wolverine drives one in that movie.

 

they have also moved the water seal groove back to the way it used to be ... pre 86??

 

damn!... thats nice if thats true, ive been searching this forum for "4th gen rx7s" and everyone has their own assumptions of what the engine will be, and im not shooting down what you said but itd just be nice to see a reliable source that we could read it off... maybe than we can have the same reaction as the squirrel under your post....

 

but will the 4th gen 7 be a turbo (in the US versions)?

i read in car & driver, the rx8 edition (i would tell you the month of the mag right now but i don't have it with me), that the new rx8's would not be turbo'd even in the future because of emission problems. according the car & driver's report on the renesis engine, rotary engines will burn cooler (?????) with a turbo, thus making it harder for the cat to clean up the smog.

i know that the cat needs to be pretty hot to work effectively... and i know that rotaries burn much hotter than a conventional piston engine... so if you add a turbo, won't the heat of the rotary engine just go up?!

wtf?

 

did you guys dig that blue protege with the rx3 front in bern's link? man does that look sweet. i would love to see mazda go with a retro look for the new rx7

 

Looks like they are leaving the turbo add on up to us!!

RX7.com will be getting several RX8s in in the next couple of months, one of them will be a drag car.....probably like the current RX7 that they are running, not a back half car. The others will be for heavy development of aftermarket parts!!!

 

but what i really wanna know is why (if it is true) a rotary burns cooler if it has a turbo...

i wouldn't mind putting a turbo on myself though

 

There are a number of styling cues that all generations of RX-7 have had:
* wrap around rear glass (the 1st gen was supposed to have it, but it was too expensive)
* pop-up lights
* 'classic' sports car proportions

with the exception of the pop-up lights the RX-8 has the other two to a degree. The new 7 will, IMO, have a strong resembalance to the RX-8 but be more muscular and raw, along the lines of the 3rd gen, but still with a clear link to the 8.

 

Its all speculation as to what the next generation RX-7 will look like... it is on Mazdas drawing board though.

 

I think it's safe to say that Mazda isn't dumb enough to suddenly drop the line of rx-7's. Although many manufacturers eff-up the newest models of good cars, I have faith in Mazda.

(The RX8 looks ok, I saw it too in X-men but come on... just think of how much cooler it'd be if wolverine drove a seven!!)

 

haha! right on!

 

man, i wish i photoshopped!!! There was only one picture in this whole thread!!! anyone?

 

somone on the board said the 4th Gen Rx-7 will be able to compete up there with the exotics... 15BTT somewhere around 400HP , proly just another rumor but man, that would be an amazing machine...
O what about a 20BTT Version of the Renesis

 

Again about as much info as Mazda is reliably releasing:

-Bern

 

Just to comment on whether it will be turbo or no.....

Turbos do not affect emissions in a negative way. Usually, they actually decrease the amounts of HC, and CO in the exaust (obvously increasing C02 ever so slightly, but should be expected, due to the chemistry). Turbo might hurt gas milage a very small amount, for cruising. All in all a turbo won't hurt emmissions.

The only reason I can see, why mazda may not add a turbo to the new RX-7, is more a reliability issue. Lets face it 3rd gens were a warrantee/reliablility nightmare. They were very aggressively built and tunned from the factory, and were inadequate in the cooling department. That combined with falling sales, caused by overpricing their own market . IMO, the average american won't buy a japanese import for 35k when they can pick up a mustang or camaro for 25k, even if it outperforms in every way. At least thats the way it was in the 80's early 90's. That was the RX-7's demise here in the US. Mazda I'm sure has learned from that expirence, but the question is whether it sour'd them to turbocharging.

 

That's true.

If any of you read mazda's comments on bern's web page. you would know that mazda stated that the new 7's will most likely NOT be turbocharged. It will be of larger displacement. (mostlikely 1.5l) and it will be a 2-rotor. and based off the rx-8 chassis. other than that, i dont think anything else has been relased by mazda.

 

Mazda had the right idea with the second gen. Offer a N/A version and a turbocharged version and let the people decide. Offering the FD only as a turbocharged model was just asking for the reliablity/sales problems. The new RX7 should be offered with a Renesis motor as the naturally aspirated version and for a few thousand more, a turbocharged version with a redesigned "traditional" motor.

 

God I hope that 8 port 16B comment was a joke! If 6 is good 8 is better? Um no. The discussions that Mazda engineers are having is over 3 possible configurations for the next rotary engine whether it be RX-8 upgrade or otherwise are as follows... supercharger, turbocharger, larger displacement. Pick one but don't combine it with another. They will not go back to a twin turbo setup so stop dreaming about that. After the nightmare they had with the 3rd gens does anyone really think they'll try it again??? No! Mazda has admitted that the new engine (Renesis) can handle boost but they didn't elaborate what they meant by it or to what extent. Since Japanese auto makers have a self imposed horepower limit of 280 why would they build a 15B with a turbo when the Renesis already makes 250hp? They may make a slightly higher horsepower engine of larger displacement or add a low boost turbo or supercharger system but don't expect a mega horsepower supercar to appear. For that we'll have to rely on the aftermarket.

The Renesis is based on the 13B. Same dimensions but almost everything has been changed/altered in some way. Its kind of like having a LSI and LT1 V8 sitting next to each other. Same size and type of engines but not the same. The rotor housings still do have 13B on them. I've seen it. Mybe the production versions will say Renesis or maybe they'll still say 13B. We haven't seen a production one yet so who knows.

 

Turbochargers actually do hurt emitions. With modern catalytic converter systems the vast majority of icky stuff released into the air is done so before the cat heats up. When a car is just starting up a turbo acts as a heat sink and therefore it takes longer for the cat to reach operating temp and more pollutants are released.

 

Actually only the second part of that is true. A turbo does work as a heatsink in a sense and this does cause the cat to heat up slower. Remember the 2nd gen TII's with their dual cats? Hell, the n/a's had 3! A smaller one for emissions when cold. How about the Subaru WRX with cats before the turbo. Saying a turbo can't be used due to emissions is a very poor excuse since more and more cars are starting to use them again and at the same time emissions laws are getting more and more strict. In spite of what some of the less educated say, the Renesis is not a cold burning engine. It is just not as hot in the exhaust as the 12A/13B series of engines but more along the lines of a traditional piston engine. It burns much cleaner than the earlier rotaries anyways so there's less to clean up. But, in absolutely no way does the turbocharger itself hurt emissions. The exhaust enteing it is just as dirty as the exhaust leaving it. The heatsink effect is just another thing to design around. If you can figure out how to design an engine that can handle boost, can figure out how to integrate a turbo onto a car, can figure out how to fit an intercooler in the car, and can figure out how to tune it, then why can't one figure out how to get it to pass emissions with a turbo? They already know how. Maybe Mazda is just being very vague to keep the public guessing. they don't tell us most of what they do until long after it's done.