Anybody into rotary engines or own a rotary engined car, even a mazda.
my neighbor has an 1988 RX-7 converable in excellant condition. its got a rotary.
Rotary's are cool engine designs. We actually got to rebuild one in Tech School about 10 years ago.
http://auto.howstuffworks.com/rotary-engine.htm<<some of the best pictures and info on them around.
No he's not the Tom from M-Space!
there fast, make great power and especcially easy to rebuild. my grandpa owns a 1200cc
12A rotary engine that makes 300hp no turbos. peak power around 10,500rpm. i've seen him and my uncle pick the engine up right out of the 1995 RX-7 he owns. A RE powered R/C car is a thought.
Last edited by SLEDGE_74; 11-09-2006 at 07:29 PM.
13Bs and 20Bs are nice motors when mated with a good turbo, but they will blow up like no other. 13Bs also eat apex seals for lunch
Depends on which apex seals you use. Stock steel seals are not guarenteed above 8000rpm. on the other hand carbon seals are rated to 9500rpm but not very long. Then the ceramic seals are rated to 12,000rpm, and any rotary motor with ceramic seals if you can keep your motor under 10,000rpm every race it probably would last forever. my grandpa'sOriginally Posted by MaxxkillaV2
12A has revved 16,500rpm missing a shift for 4-gear to 1-gear, going 120mph, and it only put a scratch in a rotor bearing.
but ceramic seals cant handle nitrous, and are around $3000 bucks for a set of seals.
Last edited by SLEDGE_74; 11-10-2006 at 07:06 AM.
i like the rotary r/c engine idea myself. if only it would get better milege.
has anyone hear of the mazda 787b race car? it is a really good one and runes off of a rotary 4 engine and it was the la mans champion the last year it raced.
note: that mazda's engine sounds like it's going to fall apart yet that is just the way it sounds.
Last edited by Traxxasfan24; 11-10-2006 at 07:21 AM.
whoa geez! ha try that with ur 4 cycle.....Originally Posted by SLEDGE_74
I love the concept of the RE engines. They produce great power and are actually very easy to work on. But don't get me wrong, I love my big ol V8s.
My truck sees more air than yours!!!
the 787b had 690hp and weighted 2000lbs. it was fast.
the rotary rc car idea would be cool. BUT the downside would be you couldn't use nitro fuel. it would be very fast and easy to start having low compression.
the exhaust would melt parts
the reason rotary engines are better than regular combustion engines is because you don't have valves or pushrods. There's no valvetrain. in other words if you racing somebody hard into a corner the other guy with his 4 banger or whatever it may be has to shift but you don't not having a valvetrain. not having to worry about bending valves or pushrods.
thanks 1fast3.3 for that link. i haven't seen that before.
Please elaborate on exactly how the lack of a valvetrain means you don't have to shift.Originally Posted by SLEDGE_74
Don't believe everything you think.
theres nothing to break overreving the engine besides the seals. but it doesn't hurt the engine doing it once or twice in one race because you cant bend valves or pushrods. it just wears out seals.
also depends on which seals you have and which engine you running.
Last edited by SLEDGE_74; 11-10-2006 at 08:20 PM.
Dont think he meant shifting, but if you over-rev 4 stroke motors you could get valve float, and thats what bends valves.Originally Posted by Highlanduh
16,500 can be done with 4 cycle motors. You seen the redline on the new R6? We're talkin 16k-17K rpms.whoa geez! ha try that with ur 4 cycle.....
formula one car engines make way more rpm than a rotary, they can easily hit 19,000.
Last edited by aussiek2000; 11-11-2006 at 03:47 PM.
Heck - you want impressive, look at top fuelers. They do 9500rpm with a 500 cubic inch V8. That is incredible, considering the size of the pistons...
Engine wear is cumulative... your logic isn't quite sound in that respect.Originally Posted by SLEDGE_74
Six in a row makes it go.
Rotary engines aren't bad, but there is a reason they don't use them very much. They just don't win that many races.
OK, but I can't imagine what else he could possibly mean by this:Originally Posted by MaxxkillaV2
... the other guy with his 4 banger ... has to shift but you don't ...
And after I asked him to elaborate, he tried to, so apparently he thinks that's what he meant..
Last edited by Highlanduh; 11-11-2006 at 08:17 PM.
Don't believe everything you think.
you have to consider that formula one cars. have way more money into them than anybody who has ever put into a rotary engine before.
you also have to understand that overreving a rotary engine is not a problem if the engine is properly balanced and lightened. the real problem is nobody has the technology the make the seals last over 12,000 rpm. also not enough oil is supplied to the rotor bearings unless you have factory dry sump. which is very expensive in which not many people have. and most of the SCCA, le mans, and NASA classes restrict rotarys because they are so fast. once unrestricted, if you stick a big enough of a carberetor onto a periphial ported rotary motor, no matter what size rotary it is they can produce MASSIVE amounts of power at high rpm. although not reving as high as formula one car. it still revs qiuck. take a look at this pic. below so i can explain the diff. between a periphial motor and a stock ported motor.
in the picture the large ports or the round ports are the periphial ports and the smaller ports beside them are the stock ports. they block the stock ports off with epoxy when using the periphial ported housings. and when using the periphial housing you produce more power because there is nothing restricting the air and fuel flow going to the rotors. the intake manifold is a aluminum tube. that is bent at a 90 degree curve. allowing massive amounts of fuel and air to pass through the engine but, nobody allows people to use big enough carbs on them to produce and use all of your power.
the stock ports flow fuel diagnoly through the intermediate housings. some of this info. is in the how stuff works link
i am sorry if i can't explain this very well. i know alot about the rotary engine. but sometimes i can't put some of the info into words. i wish i had a better vocabulary.
Last edited by SLEDGE_74; 11-11-2006 at 08:26 PM.
Its a shame chevy sold the rights to the rotary engine. Just imagine how popular the Vega would have been.
Or how about the Corvette with a Wankel...
Four rotor Vette
Last edited by CDR-M@X; 11-11-2006 at 10:18 PM.
$$ I have too many hobbies $$
i know that. i said "ur" 4 cycle. doubt many people on this board have something like that.Originally Posted by MaxxkillaV2
There was a .30 Wankle made by OS, but I cant seem to find it.
It was originally made for airplanes, but I saw in RCCA that some guy managed to put it in a USA-1. He seemed pleased with the results, but that was before the days of the T-Maxx style monster trucks.
if you ever do find it send me a link.Originally Posted by aznfro
The 787B is insane...it has like 3 or 4 rotors... an RX has 1 rotor lol...
As for rotary engines, they are awesome, but they are only as good as the seals are. You need good apex seals or else say buh-bye when you over-rev it. I'm not all that big of a rotary fan though...
As for normal 4-Stroke Piston motors...they can rev very high. The BMW M5 has a 5L V10 that rev's to 8,250RPM. My dad's 2004 Yamaha R1 rev's to 13,750. My Brother's 06 Yamaha R6 can do 17,500 with a race chip (he's going to get it later).
And lastly, a 2.4L V8 from a Formula 1 Car can do 20,000RPM's. The rev limiter is set at 20,001. I have seen a dyno before... they happen to idle at 9,000 RPM too.
I am personally a fan of high-revving naturally aspirated engines. Turbo's create a concentrated powerband that makes a car really annoying to drive...
My brother's EVO 8 has like 450hp but it annoying to drive cause you have to run it in the Turbo's range or it kind of bogs. And its really loud in the turbo range. Don't get me wrong its really fast, but it makes it a not-so-friendly daily driver, since you have to shift all the time to keep the RPM's up (his turbo range is like 2,900-7,500, with the redline at 8,000).
BP stands for Brushless Powered - LMT1940/7 CF G2R
it had a 4 rotor engine and if you put a turbo on it it will have around 800hp i think. that is if you can find room on the engine to put a turbo lol.Originally Posted by BP-Revo
a lot of f1 cars run v10's in them and thay had 886hp a year ago.Originally Posted by BP-Revo
yea but the f1 engines are 6 stroke i think.Originally Posted by BP-Revo
the mazda rx-2, rx-3, rx-4, and rx-7 all had and 2 rotor rotary engine but all had different sizes. the 787B had a 2.6 liter 4 rotor.Originally Posted by BP-Revo
That is somewhat correct.Originally Posted by Traxxasfan24
All the way up to the 2004-2005 season, they had 3.0L V10's. However, they produced over 1500hp. The new 2.4L V8's were commissioned and put into effect last year (2005-2006 season) and still have 1300hp, but alot less torque.
The F1 Regulations did this because Kimi Raikkonen's McLaren Mercedes (with the V10) was hitting over 240mph on the straights of certain tracks, and a crash at that speed would be disasterous.
So, now, they have the V8's which hit about 200mph.
No...they are 4 stroke lolyea but the f1 engines are 6 stroke i think.
BP stands for Brushless Powered - LMT1940/7 CF G2R
Can anyone explain to me a 6 stroke?
Six in a row makes it go.
every thing you should know!!!!
http://www.turborx7.com/ttupgrades.htm Production Information
Understand your VIN
Efini RX-7 (96-now)
Stock Fuel System
Concept Art and Design
Fuel System Upgrades
Power FC Instructions
Single Turbo Upgrades
Twin Turbo Upgrades
Porting Info and links
Blitz FMIC Installation
20B Rotary Engine Info
Apexi RX-6 vs. Stock
Greddy Pulley Kit
Basics of Rotary Engines
Rotary Engine History
Rotary Engine Vehicles
Rotary Engine Pics
Blow Off Valve Media
Rotary History Pics
Rotor and Housing Pics
My RX-7 Mods
My RX-7 Photo Gallery
2nd Gen RX-7 FC
1986 RX-7 Brochure
Rotary Engine PickUp
My '74 REPU project
Mazda's REPU Page
Pictures and Diagrams
Other RX Models
RX-8 Renesis Info/Specs
1975 Rx2 13b ttbp microtech KILS8'S hotbodies12x brushless -lrp Nitro- Rx3 brushless dragster
Last edited by skube1; 01-26-2013 at 08:33 AM.
Mercedes had a nice looking car for 69'-70-' they put a rotary engine in.
I did however really like the 93-97 RX turbo, (Too pricey for my dealership to sell any at the time they came out, that area of Maine just wasn't a higher dollar fun market area.) you can keep the RX-8, that has got to be one of the ugliest cars Mazda has ever made.
Rustler,Slash 4X4, 1/10 Rally
Here's the OS rotary mentioned earlier in the thread.
Unfortunately that RC is Non-Traxxas Had to remove it according to the rules.
Last edited by Nitronaught; 01-30-2013 at 02:48 PM. Reason: Non-Traxxas RC
What's up 2006. Nice to see you again.
This may sound stupid, but could you make a rotary nitro? I understand nitros have no ignition system and run purely off revs and heat but could it work?
Slugs are just naturally aspirated snails