motor

COFair · 01-13-2004, 03:41 PM

Felix Wankel was an UFO? How could he made an engine like this?

gottacatchup · 01-13-2004, 05:16 PM

Originally Posted by Schwalbe JG 44

The rotary engine of the Mazda RX8 is original, but where are the turbos ?

it doesnt need the turbos to make the power so they left them off although i'm sure they're coming soon, probably in the mazdaspeed version

findleybeast · 02-11-2005, 06:34 PM

I think the renesis is an engineering masterpiece. Wankels do have their obvious drawbacks, mainly being lack of torque and fuel consumption, but I think they are relatively minimal all things considered.

Remember that the wankel is being engineered and used by only one company - Mazda - and it hasn't been in use for all that long. If it had been around for as long as reciprocating engines, I'm sure many of the issues would have been resolved by now. Plus, Mazda doesn't really have to compete against anyone when it comes to engineering a new engine, and there aren't any other companies coming up with original and unique ideas to further the technology.

What I'm really hoping for in the future is for Mazda to release a 3 or 4-rotor engine in an upscale sportscar or the like. It would essentially overcome the torque problems (it is like doubling the number of cylinders in a piston engine) and a 4 rotor would be even more stable and smoother than the 2 rotor renesis. The only major roadblock is engineering a proper eccentric shaft that won't wobble and can handle the power. Remember, the Mazda 787B that won Le Mans had a 4-Rotor, and 700 hp and 620 lb-ft of torque... hardly anemic in terms of torque or power.

I would kill to see a rotary applied to a streetbike. A lot of people don't realize quite HOW small the renesis is, and if an engine was developed specifically for a bike it would be very easy to fit one in a bike, and could develop even more revs. I think it would be a huge success.

BTW, even though the Renesis is classified as a 1.3 Litre, it does fire once every rotation, effectively doubling the displacement.

Akmon · 02-11-2005, 07:25 PM

I sure like this car.The most of it for it's engine,which I think it's so cool,because it's small,it has lots of rpm's

graywolf624 · 02-11-2005, 08:15 PM

Another negative for the renesis.. it burns oil like no tomorrow..
so lets see.. only 228 hp.. drinks gas like something with twice that...
burns oil....
is ugly
does handle well though... the benefit of the wankel mainly being low engine center of gravity
honestly, there are better cars and engines for your money, but its good to be quirky I guess..

I own a mazda.. and I still wouldnt buy a rx8.

SafirXP · 02-12-2005, 02:51 AM

didn't Audi and other German car makers use rotary engines? they did stop making it... obviously they didn't think rotary engines were feasible! but you've to admit that Mazda's done a great job though...

another thing, i read somewhere that using more than two rotors make the engine very complicated, thus expensive to make! so don't think we'll see any 500bhp+ rotary engines in production.

malte · 02-12-2005, 10:03 AM

I belive mazda suggests checking the oil for every SECOND tank of gas... but still the price difference between rx8 and the 350z in my country is like 15.000 £. wich makes it a bargain! Imagine fitting 15 grand worth of enginge mods to the rx8, something none of the 350 owners here have thougth of obviously... ignorant bastards

Sir_GT · 02-12-2005, 10:08 AM

I couldn't be bothered to read the rest of it, but I was in the market for the RX8, and not only is the torque very poor, but you have high OIL consumption and gas consumption to go with it. I've heard stories of owners having to check the oil at every fill up. Why would you subject yourself to that? Not only is the MPG poor, which meant that you would have to visit the petrol stations very often, but when you do, you have to pop the hood and check the oil.

Which, I might add, has to be topped-up every 2 fill ups. Imagine the cost of going through a litre of oil every two stops? So aside from the price of petrol, you have to pay for oit too. Bang for the buck? Sod it. It's extremely expensive to run and maintain. The initial "price buster" feeling you get when you buy it is shot out the window after a few weeks.

If you want a sporty 4 seater, go buy an E90. A fully specced RX8 will cost you in the region of £26,000, while a fully specced 325i will cost you £28,000. Best to cough up the extra £2000 and live nice and easy. If you want a brilliant sports car at £24k, go out and buy the 350Z. Far superior car in every respect except for rear seats and boot space.

SafirXP · 02-12-2005, 12:47 PM

iMO the 350Z is one butt ugly car, like the TT! not that the RX8 is a great looking car....

Sir_GT · 02-12-2005, 01:57 PM

Originally Posted by SafirXP

iMO the 350Z is one butt ugly car, like the TT! not that the RX8 is a great looking car....

You're probably the only person I've ever heard say that. The first 250 units of the 350Z sold out in the UK in an hour upon announcement. That was around May-June 2003 I think. You had to wait until March 2004 to get a hold of one again.

The TT was also the best selling coupe/roadster in the UK for 3 straight years. It also holds one of the highest resale values this side of a Porsce Boxster. In fact, there are probably more TT's on the road than any other 2 seater at any given time.

So... it begs the question: what exactly is a good looking car to you mate?

SafirXP · 02-12-2005, 02:18 PM

dont like fat round ones like the 350Z or the TT... guess its just me! just don't like that design. i'd be more than happy with a BMW 3 series coupe... love that design!

sergei_dekker85 · 02-13-2005, 01:13 AM

Originally Posted by godspeed06

sorry man but if it has a 1.3L and more than two wheels it isn't for me. i wouldn't want to drive a car with no torque daily.

Agreed.....and i wouldn't want an engine which lasts me only 6000KM(according to my friend who owned and FC3s his wankel threw in the towel after 6000KM even with good maintainence)well its alot more reliable than the past but still i doubt its reliablity and it can't really compare to a piston engine....A wankel VS a RB26DETT? no way oh and did i mention that it had really appalling fuel consumption???

sergei_dekker85 · 02-13-2005, 01:16 AM

Originally Posted by SafirXP

iMO the 350Z is one butt ugly car, like the TT! not that the RX8 is a great looking car....

No offense to RX8 owners but i find the car Neither here nor there.....its trying to be a sedan and at the same time a coupe

pagani · 02-13-2005, 09:45 AM

I think it's good car+ good engine it needs more topend power and torque.
Blitz have now a supercharger for more torque and a bit more top end power.
Mazda needs to make turbo version of the rotary engine maby a coupe.
I love the old fc3 rx7 twin turbo maby a new rx7 type car is a good idea.

:shock:

abbor · 02-13-2005, 10:48 AM

Have anyone seen how long it is since this topic was last written in? A year and a month..