Originally Posted by RootzMan (Post 414362)

I have no idea how you get the impression that I think my experience matters more than any other. I can only imagine that you didn't read my posts correctly. I think no such thing and am always prepared to learn from people who's open minds and creative character have allowed them to explore new ground.

Correct me if I'm wrong but it seems to me that snellemin's only post in this thread concerns motor choice and nothing about wheels or tyres. I find that a useful maxim is always to read 3 times before typing.

Strange how you now state that hitting 100mph will take immense effort when your previous post implied that it was easy. And if you think it's easy to make tyres, I suggest you do so. You may find it harder than you think.

Your suggestion that short-course-based wheels would be suitable as a basis for a speed-run wheel is very interesting, if somewhat misguided. I'm not sure why you chose short course. I tried buggy wheels with on-road tyres ( inconclusively )...

However, I'm not convinced short-course wheels would be an improvement. Unless you have a persuasive argument.

Originally Posted by TexasSP (Post 414345)

Putting that motor in a revo is impractical for many reasons including the shear size. You also can't compare a flat chassis truggy to the revo chassis when doing something of this nature.

A motor that size is also not needed to reach 100 in an e-revo. Many of the options already suggested would be a good start. Either way it's something that will take some experimentation to get right and more than just the motor mount and size needs to be in the equation.

RootzMan, we all know that much of what is on here is a matter of opinion so no need beating the subject to prove whatever point or feeling you have about it. You do have to keep in mind that most of the people here are offering their opinions based on personal experience and facts which goes much further than just someone stating their opinion who has never tried any of this before.

Originally Posted by TexasSP (Post 414376)

You make a lot of assumptions again and again.

Originally Posted by TexasSP (Post 414376)

I have made my own tires, it is done quite a bit in the crawler/scaler world using other tires, cutting, then gluing.

Originally Posted by TexasSP (Post 414376)

Bigger tires make for more weight and higher rotating mass, thus robbing you of energy that could be put elsewhere.

Originally Posted by TexasSP (Post 414376)

Like I said, I did the speed thing, I know what it takes. I never implied it would be easy. I can tell you though that I never got anywhere using bigger tires and gearing for them.

Originally Posted by TexasSP (Post 414376)

As for snellemin's posts I was agreeing on the points about motors and then adding my own about the tires. You seem to want to pick apart little things too much. Stop being so asinine about the whole thing. :whistle:

Originally Posted by lincpimp (Post 414695)

Pretty sure the 1521 wil be the longest can motor that will fit an ervo with mods. I think 1521 on 6s with a sutable kv to do 45k - 50k rpm max with the correct gearing will be the best bet to get up to 100mph. Airflow mgmt will be critical, and I think a tire around 1.5" wide will be about right.

Originally Posted by RootzMan (Post 414675)

What assumptions? Assuming you don't know what you're talking about? I would have said that was self-evident.



When the vehicle in question is only going to do 3mph, cut'n'shut tyres are all well and good. I would never recommend this construction technique for speed tyres. Unless you really like to see spectacular crashes.




It's true to say that, for a given construction, the bigger the tyre, the higher the rotating mass and that this will reduce the power available to propel the vehicle forward. It's not true to say that big tyres are bad. There is a trade-off and it's therefore reasonable to assume that there is a "sweet spot" somewhere along the continuum between 2" and 8". Where that sweet spot is will depend on the construction of the tyre and wheel. Foam tyres are generally far lighter than standard rubber and so the sweet spot will tend towards the larger sizes. That said, let us remember that the fastest E-Revo so far, used 5 1/2" tyres.



You did "the speed thing"? Perhaps you'd be willing to share your performance. Just because you never got anywhere with larger tyres doesn't persuade me unless you're going to substantiate your opinion with facts.



Well, I certainly congratulate you on learning a new word. It pays to enrich your word power. However, knowing words isn't everything. You need to know how to put them in an order that reflects what's going on in your head. I suggest you practice that. As for the name calling, it now becomes clear to me why you were defending Brian's post. You think insulting strangers is acceptable. Well, let's hope you don't insult some one who's carrying a gun. Oh! And before you descend into a tirade involving statements about my Mother, I'm immune to such attempts as these really only work on Americans.

Originally Posted by RootzMan (Post 414374)

There was another guy who persuaded John's BSR to make up a set of big foams for his E-Maxx. They were narrower than mine and cost him a whole lot without much success.

Originally Posted by Rivermaxx (Post 418943)

That happens to be me I broke the current open wheel world record for that year(2009) and probably still the fastest e-maxx around so "not much success" is your opinion. How fast is your erevo on 6s? Id really like to know Vid or proof would be appreciated. Btw There was no other option for tires back then bsr made them for ~150 and told me to run them narrow. Should of made them wide or used traction compound because traction after 70 mph on that dirty track sucked for foam tires. Sorry for post digging but needed to defend my car lol.