3 Rotor Top Speed?
 

Yet another unanswered but sought after question that nobody ever asks.

What is a 3 rotors top speed?
As a side question (4 rotor top speed?)

Yes i know not a lot of people have 3 rotor setups and even less 4 rotor
But this has had to have been documented somewhere right?
Thanks in advance guys, I know i'm not the only one that's ever been curious.

Mach YoMama at least if not Mach OMG.

If you think about it top speed is HP, gearing and aerodynamically driven....

To many " depends" to give you a valid answer :)

Both have an equal top speed if falling in a vacuum.

omg...ok ok. given what you know about previous users with 3 rotor setups / average 3 rotor setup yada yada whatever you want to say to make it an average 3 rotor build. What do you think/know the average 3 rotor build could top out at? also taking into account that you pretty much have to swap out the entire transmission with one that can handle the extra hp, theres not many transmissions 3 rotor users have tried. lets take a guess here guys and stop beating around the bush with ifs and whats and blahs, make a guess, give details what you based your guess on.

redline in 6th gear will be the same wheel speed no matter what engine is in it as long as the tranny has the same gearing, and the engine has the power to overcome resistance.

OP,

There are quite a few intelligent people on this thread trying to tell you that there is no way of guessing on your question. My guess is, not much more that 155 mph (which you can do in a stock 8 with a 6sp MT in 5th gear) You're just likely to get to that speed faster. (accelerate harder)

Precisely 237.587923 MPH

With the stock gearing, an engine turning 9,000 rpm with the 6 speed transmission will top out at 186 mph. The Renesis of course doesn't make enough HP to do that. It will top out at about 150-155 due to aero drag. To go faster, you need more HP and a lower rear gear ratio.

plus there is no such thing as an "average" 3 rotor build.
Some 3 rotors are NA. Some have MASSIVE turbos on (see Angel Joel)

Ask it again:
What's the top speed of a 20b build with W transmission X:Y 5th or 6th gear ratio and a final gear of Z? Tyre diameter being A, Aero Drag being a constant ('nuff pauah to go reach the limiter), rev limiter of C.
Well we have some variables lol

Here's a tangent: How much horsepower would actually be needed with a stock-bodied RX-8 series 1 with stock gearing and stock tire width to get to the redline limited 186mph?

Im sorry...that is a pretty badly framed question. Dannobre nailed it

*sigh* okay, i know my question was horribly worded, i was hoping someone would work with me here..., lets rephrase and try to salvage this thread.

If you have any details on whoevers 3-4 rotor builds that pertains to this question, please list some details.

taking aero dynamics/weight and mass aside.
top speed is a calculation of wheel dimention. diff ratio trans ratio and rpm

so your answer is very easy to figure out.
now throw in weight, rotating mass and aero back into the picture and if you are geared for 400mph... the vehicle will never make it.

With enough $$$$; Mach ZOMG is even possible

move to plaid speed!

flat ground or going down a hill?

Fuck a 3 rotor.

http://www.turborx7.com/images/repics/6-rotor.jpg

i am by all means not even close to a tuner. i can modify one.. but..
how the hell can you tune for a 6 rotor?
unless it was in pairs then would be a bit easier just correct for load and timing?
i bet even MM would have a hard time? or i could be completely wrong...
and its just simple to mirror a tune with an offset for the degree of each rotor.

Honestly, who cares? Have you even gotten an RX-8 stock to it's top speed? I'd say probably not. So why care about a three rotors top speed?

Yes... 147mph...downhill...lol i almost died....:spank:

But, like this thread, neither here nor there.

i went 152 on open road in wisconsin, kind of dissapointed i didnt try once i had my turbo in. but it sure took a while to get from 130-150

Probably the only non-fanboi in this forum
 

An intelligent answer to a simple question. No posing, no off-topic bullshit, just a matter of fact answer to the original poster's question. Respect, Al.

As for the rest of the cadre that didn't know the answer but couldn't man up to say it, go back to your porn sites.

Actually, it's a pretty well framed simple question. Just a badly framed response.

Yes, and with enough $$$$, you might even find some intelligence.

Whacking off

This answer has what to do with the original question?

Jerking off

Nice picture, must be there to satisfy your ego instead of answering the question

Ever Considered Ritalin for that ADHD

Obviously, the original poster does. Why do you care why he's asking it

A spark of intelligence, not to mention experience! On the RX8Club forum yet! Has Hell really frozen over?

A gazillion MPH

^^^lol from the man with a 3 rotor.

Top speed is actually (Pi x 100)/2, give or take a few MPH.

88 mph!

Oh Zenrx8...you're so cute...

:)

Mine is JDM so its locked to 116MPH (187KPH)

I have to dip the clutch to trick the limiter , never went over 135MPH though

Mikami, im not trying to be meanspirited, (just busting your balls a bit cause its just a very open ended question. No matter how smart we all may THINK we are...we are all trying to learn, and ill never knock anyone for that.

As with most life problems, we can make a model of the situation to simplify, making assumptions and resolving the problem into its different components.

Assuming:
1) Power is the variable ( power = ability to do work over time) -> and (work being a force applied over a distance)
2) A constant Coefficient of drag (vehicle body shape will not change)
3)Optimal gearing
4) Infinite roadway to reach this top speed

With the given assumptions "Top Speed" will in EVERY case be limited by the fluid in which the vehicle is traveling. As i've defined Top Speed then, it is analagous to Terminal Velocity which is a funtion of Drag forces vs Thrust (which is a function of power). It is the point where the Thrust and Drag forces are equal.
It gets a little complex because while the Thrust (foward force) is constant, the Drag force in the opposing direction is not.
In fact...its exponential. If you have a vehicle with say...100 hp...and its max V is 100 mph, to go TWICE as fast with the same body shape, we have to have more than FOUR TIMES the amount of hp. But i digress

Given these assumptions a certain amount of HP is required to achieve a certain top speed.

OP, you didnt specify the body type for the powerplant which is quite important to figuring out the total Drag force. HP for all three rotor engine is not the same. HP for all four rotors is not the same. The power levels can vary from 280HP to more than 1500 HP.

All of the assumptions made might not even be valid (gearing could be suboptimal, might not have enough space, power probably isnt constant etc)...but they are necesary to better frame the question... Othewise, there are a ton of variables that go unaccounted for.

^ This is a well framed question. ^

you guys are hilarious, you turned this thread from people trolling to almost a actual real thread.

So since we're never going to be able to really nail down the exact physics here, lets try asking someone with a 3 rotor how fast they've been? because you don't buy a 3 rotor and not go fast. eh?

If all else fails, we'll steal someones 3 rotor details/setups and "ATTEMPT" to do the math.

and thats all depending on the trolls putting in some helpful effort and *cough* angel's *cough* speedometer working and him being in the mood to share probably one of his favorite drives down a long road. :)

There's always the calculator:

http://www.letstorquebhp.com/calculator.asp

a stock rx8 with a turbo/sc (approx 250 hp at the wheels) will reach the rev limiter ((approx 273kmph) in approx 30 seconds given you have the road for it and more then a 1/4 tank of petrol.
if you are in warm climate prepare for the temp needle to move when you slow down or maintain.

But I am a fanboi (this is my 3rd rotary car) and now I will go back to downloading porn.

Angel has a mad power 3 rotor.

He has approached 47 mph before something broke / blew up / snapped off. (sorry Joel I couldn't resist!)