144.93 mph e-revo??
 

Ok so I got bored and decided to see how fast I could get my E-revo (if I ever get to finish it). With the speed calculator I got 144.93 mph. Numbers are as follows.

F/r diff ratio - 8th scale buggy diff 43/13
Center Diff - 2.2 slipperential
additional - 1
Spur - 34
Pinion - 24
voltage - 24 6s lipo @ 4.00v
Kv - 2700 Neu 1515 1.5d
tire diameter - 5.75
Ballooning - 1.0

So who's willing to find out how much wind resistance there is on an e-revo @ 145mph:018:
I seriously doubt it will ever hit that speed, but it'd be really cool to try. Nevermind the ensueing explosion that'd occur if you wrecked:028:
Just a thought.

I see a couple of issues with the numbers you input that make it very unrealistic.

For one, the lipos will likely not hold 4.0V under load, more like 3.5-3.7V depending on which cells you use...maybe even less using such a high kv motor at 6S.

The ballooning is in terms of radius, not diameter. So if you had 7.75" tires due to ballooning, rest assured, you won't keep it straight enough to drive it fast.

I realize that the numbers are outright insane. But even if you drop the voltage down to 3.7 under load and .5 radius for ballooniing. You still get 115mph. I'm sure the tires would probably gain 1" in radius at those kind of speeds, assuming you could find some sort of way to keep them on the rims. They'd probably shred or fly apart. I in no way expect a revo to achieve that kind of speed. I just was tinkering around and came across that speed number and thought I'd share. Granted if you ran a high MAH pack say a 10k the batteries would probably be able to keep 4.0v underload.

But yea, Driving it at those speeds would be impossible. Trying to drive my revo when it was still a nitro @45 was nuts. I just wanna see it tried.

It's the diameter of the tires and the ballooning thing that gave you such a high speed. Try putting 5.2" for the tires dia and .25 for the ballooning and see the new top speed.

Sure, it'll hit 144 mph.... in a vacuum! :)

It won't matter what tires you put on there, it won't hit 144mph. The wind drag on a vehicle is quite substantial at that speed. It takes serious power and/or a very aerodynamic vehicle to get to that speed. The speed calculator is accurate to about 50ish mph before wind and other drag forces skew the calculation too much.

Yea, tires have a huge factor on the speed. I just went with the tires off my current tire measurement. I'm sure with street tires it'd be more like 5.2-5.5. I don't have a set of m/t street tires lieing around.

Like I said, who wants to figure out how much wind resistance there is at that speed. @ 50 the body of a stock revo seems like it wants to fly off. Nevermind 145:018: I get giddy just thinking about the idea nevermind how unrealistic it is. Makes me want to spend the $75 on parts to find out. Then rebiuld my entire revo from scratch after it wrecks.

Even if you could get it up to 100mph that would be a real feat! Need a very aerodynamic body and good pins:005: Some street tires that won't balloon as much. And maybe a parachute to slow it down from the rear so it won't just flip out of control when you slow down:D

Think parachute for brakes...hee hee seriously that's what worries me when I think of building a 100mph car.... what do you do after you get it up to speed to keep from piling it into something trying to stop? :D

Yea...I'm a little afraid already about my 5S speed runs on my 1950/6 Hi-Amp when it comes in. I should easily pull 60+ on a high geared speed run. At those speeds, I'm going to have a heck of a time controlling it. I will probably get some street tires and work hard to make sure they don't balloon.

Also, for general info, every 10mph above 65mph has 2x the wind resistance. So 75mph has 2x the wind resistance as 65, and 85mph has 2x the resistance of 75mph. This is why a 300hp car can do about 150-160 but it takes a good 500+hp to do 200mph. You can imagine how hard it is to get from 190mph to 200mph. This is why so few cars do 200mph. The Corvette, despite the fact the new Z06 has 500hp, still "only" does 196mph because of this wind resistance.

Also why it takes a whole 1001hp to power the Veyron to 253mph.

Aerodynamics.. For people who can't build engines..

That was said by Enzo Ferrari. I have to agree with it somewhat. As long as its not a wall, its fine.

Take the BMW M5 for example, 204mph, and its a 5 Series Sedan. All thanks to a 507hp hi-revving V10. I love this car - its my dream car. It defies nearly every logical definition of cars. A sedan that can beat high end sports cars. In Top Gear, on their test track, it pulled a better lap than a Corvette. :005:

hmm dat zou bouwen zijn in het nederlands.

Probeer het eens in het nerderlands. Niet gemeen doen tegen een buitenlander he?!

:032:Huh?

An online translation yields:

Still doesn't make sense to me... unless the translater is wacked. :)

means: hhhhhhmmmmmm, that would be building in dutch.
try it in dutch once, dont be mean to a foreigner hé?!

dont really know what he means tough.:032:

Me Dutchy, you American.. Me no speak engliche..

Funny thing, when Rene and me speak english together, we feel like there is no language barrier at all :) Hehe, two times negative equals positive.

Yeah, that's a stated fact Daf!

a vette will pull 1.0g on skidd pad lemme see a bmw do that ... thats not 4 x the price of a vette.... and if you wanna "try" and build a 100mph revo by all means try away ill be right here reading about it :)

you should be able to control that g2r with ease on pavement. i had no problems at all controlling mine running strapped road rages at that speed! my front wheels stayed an inch or two off the ground at around 40mph, and i had way more stability than the ntc3 i was racing!:dft012:

Actually...the Z06 Vette is about the same price as an M5. Agian, you are comparing a Sedan to a Sports car...Just the fact that an M5 can even keep up or almost keep up means it already wins, since its sedan vs sports car.

However, since the M5 did actually pull a better lap...the M5 wins lol...

What's wrong with a sedan with better sports car ambitions than the so called sports car? The M5 simple is a monster, so is the vet, but a sports car being joked around by a sedan.. That's hilarious, don't you think?

Thats what I'm saying lol...I think the M5 does .7g's on a skidpad, which is very darn respectable for being nearly twice as high and 1k pounds heavier.

LOL, i see...

yeah, the engineers really did something nice on her.

http://www.speeding.co.uk/acatalog/badgempower.JPG

:D

I don't know what test showed the M5 with the faster lap times than a Z06.... but I'm pretty sure the new 08 Z06 will lay down much quicker times now. So the new M5 should actually be compared to the new Vette, which is faster than before.

Curiously I have seen tests of the Z06 that differed greatly.... it was just ok on one test but was fantastic on another... so much so that the article has to comment on it, that perhaps something was amiss in the first one. I don't remember where I read that but I did somewhere.

BTW, the fact that the M5 is a sedan makes it more amazing in what it can do... but that doesn't make it better than a 'sports car' imo. ;)

Personally, like glassdoctor said, the new '08 Z06 SS will be one badass car. The M5 has nothing on either. :D

Yea, the Z06 is an awesome car. But I am thoroughly disappointed that it still doesn't go 200mph after all these years. I mean even the M5 does 200mph...but the Vette, after competing with the Viper for like 10+ years, still hasn't broken that bearier.

the vette will kill the 200 mile barrier if they release the blue demon! Of course they need to take the governor off the vette!

iv got an 84 vette and it does better on the skid pad stock then a new stock vette... granted the new one kicks my azz in the quarter but i paid 5k for my car and its 22 years old and will still out corner most new cars even 6 x its price and with the new ones not breaking 200 mph ... im sure if they really tried to make it a 200mph car they could...but top speed is kinda a stupid way to compair cars...there are sooo many other more important factors

I don't see what the big deal is. You will probably never see 200mph. Certainly not on any racetrack...

It does do at least 198 in stock form. Keep in mind that very few cars have ever done 200 off the showroom floor. Most supercars are geared for around 190 or so but fall short of 200.

A light tune and a gear change would push it over 200 but that doesn't make it a better car... just slower to get to it's top speed.

Z06 costs $65-70k

tell me another car for that price that does anything better except get groceries.... ;)

the corvette sledgehammer back in i think 1988? it did 254mph, back in 88. Im not a big corvette fan but they have the ability to go 200mph easy, the production models of corvette are a high end sports car to way low end super car. they have the nitch and do it well. if they wanted to raise the price they could sell much better vehicles. Its not truly competing with the viper eather, Its much lighter and has a much smaller engine. eather company is more than capable of bettering both vehicles but no one would buy a chevy or dodge supercar. so they market where they need to

Z06 starts at 70k, but once all the basics are done its like 75k+ easy. Also, goes 196 according to Chevy's website.

I know theres much more than top speed, but even so...its a 7L V8...

For 70K you could easily have a 500 wheel HP Lancer Evo that would blow a Vette sky high at anything less than 150mph, not mentioning it could completely trounce it on a track.

Vettes are just overrated in my opinion.

No, there not. All that Jap stuff is. :p

Think of it this way. $70k in a Lancer is like spending $200k on a Vette. It is EASY to get 800+ hp out of a Vette. You have to remember, Chevy has to keep the Vette reasonable powered or insurance would make it almost impossible for most to get one. Not to mention, and you said it yourself, a sedan and a sports car are way different. It's like comparing apples and oranges. 2 seater vs. 4, awd vs. rwd, v6 vs. v8. Besides, what kinda moron would spend 70k on a Lancer?? Comparing a car with 3x its initial cost in hoppups to a car that is bone stock isn't fair. I could spend $70k on a Tahoe and have it beat a Corvette, but nobody in there right mind would do it...

Well heck we're talking box stock, not a tuner car, lol....
I jsut read a review (2006 model I think) of a Z06 base price was $65k and change... and $71k as tested... the Viper in the same article was $86k and change btw.

If we are talking tuners then there are Z06 packages with +1000HP and upgraded suspension and brakes.
see: Lingenfelter....

Funny thing is the Z06 is the one car that is not overrated. Vettes in general yes... but not the 06 and newer Z06.... it's a Ferrari killer. That new Ferrari is awesome (forget the name...) and it's a Z06 killer, lol.... but it;s the only one that can hang and it's $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$......

revo, anyone? lol.

lol. What about a Revo? Who's talking about Revo's? You gotta try and stay on topic. ;) lol.