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Poll

Rotaries - yay or nay!

ay!
52 (55.9%)
ay!
41 (44.1%)

Total Members Voted: 90

Author Topic: Rotaries  (Read 12681 times)

Lith

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« Reply #30 on: November 23, 2010, 01:39:03 PM »
Quote from: sublime89;518517
i think the engine is too small. 1.3 ffs! They need to make it at least 4 rotors from factory plus a single turbo.


They aren't REALLY 1.3litres in terms of engine cycle, they are 1.3litres in single combustion chamber size but the chambers are used a lot more frequently in a single full cycle than a piston engine.  They are more like a 2.6litre engine, and they produce torque (and power) to suit that...  for example, the Series 6 RX7s had basically the same peak torque and peak power at the same rpm as an RB25DET from the time.

They also use fuel like (or worse than) an RB25....
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Shadow

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« Reply #31 on: November 23, 2010, 01:45:32 PM »
there new 13's in the rx-8 made fuel consumption like a rb25det, before that the used gas like a 3.6l or something :P

Lith

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« Reply #32 on: November 23, 2010, 01:47:56 PM »
The new 13BMSP is still a rotary, the displacement equivalency is still the same - its just a bit more fuel efficient (err... apparently) due to better design.  Same can apply to more modern piston engines.
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npk

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« Reply #33 on: November 23, 2010, 02:13:46 PM »
Quote from: Shadow;518535
there new 13's in the rx-8 made fuel consumption like a rb25det, before that the used gas like a 3.6l or something :P


Yeah, I've heard similar MPG from a 5L V8 and a 13B-REW.. Which kinda says something.

npk

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« Reply #34 on: November 23, 2010, 02:15:30 PM »
Quote from: Lith;518536
The new 13BMSP is still a rotary, the displacement equivalency is still the same - its just a bit more fuel efficient (err... apparently) due to better design.  Same can apply to more modern piston engines.


It burns and runs cleaner, not dumping as much fuel into the exhaust manifold etc from what I've heard. Rotaries are still very far from perfect.

screamin' skyline

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« Reply #35 on: November 23, 2010, 02:46:03 PM »
Quote from: npk;518541
. Rotaries are still very far from perfect.


Any internal combustion engine is far from perfect. They produce way to much heat to be classed as anything like efficient.
At least with a rotary everything is spinning in the same direction making the engine very quiet and balanced -assuming standard porting and induction. Actually if you remove the fan belt they are basically silent due to no valve train or pistons stopping and starting, quite amazing to witness.

npk

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« Reply #36 on: November 23, 2010, 02:50:32 PM »
Quote from: screamin' skyline;518545
Any internal combustion engine is far from perfect. They produce way to much heat to be classed as anything like efficient.
At least with a rotary everything is spinning in the same direction making the engine very quiet and balanced -assuming standard porting and induction. Actually if you remove the fan belt they are basically silent due to no valve train or pistons stopping and starting, quite amazing to witness.


But at the same time rotaries run significantly hotter than other cars, because the exhaust gasses exit the engine into the header as soon as the combustion happens.. where as a piston engine has exhaust valves in the head which let out the gas when appropriate, there, cooling it slightly.

Also the fact it's still a 2 stroke..

Speaking of 2 stroke, it burns oil. lmao

Looney_Head

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« Reply #37 on: November 23, 2010, 04:31:02 PM »
13B turbos are acceptable, 20B and 26B's look like a lot of fun when teamed with turbos.
as for anything 12a or 13b na they just annoy me, too many years of listening to them cruise up and down the street make horrible noises
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« Reply #38 on: November 23, 2010, 04:42:15 PM »
I like them, have owned a moderately modified 13B RX2 previously and it was great fun to drive, very quick and not overly obnoxious on the noise scale.

The quad rotors are in another league, awesome race machines.
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JDM.AZN

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« Reply #39 on: November 23, 2010, 05:48:53 PM »
If I had knowledge on Rotoraies I would buy a Rx7 cos they are nice as...but many people do say it is unreliable =(
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zique

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« Reply #40 on: November 23, 2010, 06:21:38 PM »
Heres the info on the 13b
http://www.rx7club.com/showpost.php?p=5519024&postcount=34

There is a MUCH more technical discussion online somewhere,cant find it but remember reading it.
My mate has a 13b and just cracked 10.99 down the quarter in the second to last drags.
Wasnt there a quad rotor NA rx-7 that ran 10s in NZ?I think it was black.

Ethan

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« Reply #41 on: November 23, 2010, 06:42:08 PM »
my mums building a 626, anyway i think they are algoods i like battys and series 5, i just hate the majority of ****s that own them[rotors] they are usually dickheads who think they are the top dudes in the world with the greatest car evee produced. I heard mazda was building a new 16b rotary but its stil not completed development wise or whatever. Also, rx8s and the next gen rx7 coming out are ugly as sin.

AGRORB

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« Reply #42 on: November 23, 2010, 08:51:22 PM »
Touchy subject for me, some i love, the majority i hate, all the twats that drive around with their clutch in, rutting away, in badly panelled 626s and DXs with retina destroyingly bright paint, chinese knock off modgies, 7 million inch drain pipe exhausts that scrape on everything and deafen peope a mile away and their fiters sticking out the bonnet on top of a horribly ''tuned'' IDA i cant stand, theyre just posers imo, in it for the trendiness and nothing else.

As an engine, i think theyre genius, not the most efficient or powerful, but damn clever and the noise (when combined with a good exhaust of course) is awesome :) Small size and relatively light weight is also an advantage which makes them an idea engine for a track car.

Would love a jet-black widebody Series 4 RX7, 20B turbo with far too much power on massively wide JDM rims :D, or a gunmetal 13BPP N/A carb'd RX4 on Equip MkIIs as a bit of a backroad weapon, half the reason being Series 4's and RX4's seem to be the most disliked of the RX family, and theyre a bit less common than the usual S1-5, RX2s and 3s etc.
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projects

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« Reply #43 on: November 23, 2010, 09:01:47 PM »
got a mate now building up a wide bodied S13 track car with a S4 13b turbo being fitted.

lighter motor and should make some good power. be interesting to see how it goes.

we're going to compare when i finish my rb26 powered to a 13b powered S13 all we need is a SR powered one to really see if there's much difference noticeable difference in weight tranfer
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Lith

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« Reply #44 on: November 23, 2010, 09:13:46 PM »
Quote from: projects;518587
got a mate now building up a wide bodied S13 track car with a S4 13b turbo being fitted.

lighter motor and should make some good power. be interesting to see how it goes.


Lighter than what?  SR20 should be a fair bit lighter than the 13B...
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