rellekndak

I am looking at purchasing my first traxxas nitro truck. I was wondering, does the revo wheelie on demand like the tmaxx? If not , how hard is it to get it to wheelie on demand?
Thanks to all.

snoking16

if tuned correctly, the right supsension set up and if your slipper is tuned right it can wheelie...not quite as easy as the tmaxx but very possible. you can also get a lower tooth spur gear to get more acceleration. but you would loose top end by a few MPH.

beer=food

What he said, l run long travel suspension, stiffer than factory , it does wheelies when it changes into second all the time, its set to change about half way through its rev range, the torque from this motor is going to destroy the driveline over time, so when l put either a picco or an RB engine in it [ instant wheelies from start ] the driveline needs to be , shall we say , truggyised, or its butter , l have destroyed my body shell from wheelies and bad jump landings.
Yes it will do wheelies, but not from out of the box.

bob5429

snoking you got the spur thing backwards again lol, a higher spur tooth count increase acceleration/ torque

jessemxt

Does a bear crap in the woods just joking mine did wheelies before I added the center diff. But I live in a very rc friendly environment,Maui Hawaii always 80 degrees and dense sea level air oh yeah

snoking16

higher spur will give you top end.

silverj

A higher Spur will yeild a slower setup with more torque, and a smaller Pinion/Bell will have the same results!

revo-nation

the t-maxx wheelies on command with the 3.3 because the suspension sucks and is way too tight. the revo suspension is set-up to NOT WHEELIE! the truck is for racing not bashing, not to say it wont outbash all others and wheelie better than all others but stock its set-up for basic track/bash with nice suspension. tmaxx is not even comparible with suspension. throw a tm523 or an os .21 then your wheeling on command but really what fun is that, and for how long?

hawk 2

A higher spur meaning more teeth, right? That's more torque.

revo-nation

yes hi torque cb and spur with LONG GEARS IN THE TRANNY
killer combo u must try

JEBSR

I ran into this same problem when replacing my spur gear last week. This is what I found on the Traxxas website. If this is true, then the more teeth (larger) spur gear will give less acceleration and more top end, and visa versa. I was trying to decide whether to run 36 or 40 tooth on my revo and and according to this the 40 tooth equals a 2.6 ratio with my setup vs a 2.4 with a 36 tooth spur. higher the number, lower the ratio. Right?

How do I calculate my gear ratio?

Use the following formula:

# of teeth on the diff gear / # of teeth on the top gear = transmission ratio

# of teeth on the spur gear / # of teeth on the pinion gear X transmission ratio = overall ratio


Just like in a full size car, the numerically higher ratio is actually geared "lower" for more acceleration while just the opposite will permit more top speed. For example: An overall ratio of 19.72 will give you incredible acceleration, but low top speed. A 7.07 ratio would really go fast, but acceleration may be sluggish.

NitroVenom

Ok the higher the teeth on the spur gear = more low end. The lower on the clutch bell = more low end. and visa versa. I know this is true because my revo is almost uncontrolable at low end. I run 14/40 gearing. Wheelies are fun!! lol. Plus I need the low gearing because my track is not the fastest thing and its really tight through the turns.

Skimore69

uhhh your wrong higher teeth on spur gives more TOP END end of discussion my lhs and i had this debate yesterday

silverj

The more teeth on the spur or less on the Bell makes for more torque less accelleration due to the Bell having to make more revolutions to turn the spur once!! If you have closer matched gears your speed will increase but u will lose torque.

20 tooth Bell 40 tooth Spur = 2 revolutions at the bell, and one at the Spur. 2/1
10 tooth Bell 40 tooth Spur = 4 revolutions at the bell, and one at the Spur. 4/1
So if a given engine can produce say 40,000 rpm your output would be 20,000 with the first setup and 10,000 with the second!

The first setup as you see produces more rpm IE more speed
The second produces less rpm IE more torque

beer=food

Yea get a 10 cent piece and a 20 put them next to eachother , a larger sper gear equalls less top end stronger bottom end.If you turn your 20 cent spur gear and your 10 bellgear it shows you whats what... The smaller cog, the one attached to the motor has the leverage over the larger cog, means the spur gear will bust first, also means its doing far more revolutions than the spur gear itself at the axle/shaft, now get a 5 cent piece, take the 10 cent away put the five cent piece in its place turn it at the same rate watch the spur gear [20 cent piece ] physicly slow down to roughly half the speed, ie, double the leverage, ie torque.That is the same as getting a larger spur gear.The leverages on induvidual cogs is different, there are a zillion combos, from larger bellcogs and smaller spur gears that will give the same top end but give more bottom or less bottom end to smaller bellcogs and larger spur gears, but the 5, 10 and 20 cent piece experiment should clear things up for people who dont realise the outer radias of the cogs speed is really irrelivant its the shaft turns that count.1 to 1, 2 to 4, 4 to 2 etc.