New E-Revo - first impressions

[VintageMA]

I got a chance to take the Revo out this morning for a little bit and battery/esc were totally cool (93* batt./108* ESC) but the motor was running pretty hot. After about 8 minutes reading 150* and after 12-13 min it was just over 170*.

I was noticing that the truck seemed to be running MUCH faster than the ~35mph the gearing called for and started to notice that the Talon tires baloon BIG. I think it was definitely more than 1" maybe even 1.5-2" total diameter. Throwing the numbers into the speed calculator gave me speeds of 46 - 52 mph which could explain the heat being generated at that gearing.

I have some smaller pinions and spurs coming in the mail for early next week, so i'll start using 1" ballooning in the calculator and try to go from 68/24 on the gearing to 62/18 which comes closer to the ~35-38 i'm looking for.

Even with the heat problems though, the truck was ballistic and soooooo smooth (and this was with 80% punch control on the MMM). I dumped about half the batteries in 17-18 minutes of running on asphalt and thick damp grass)

If anyone has some recommendations for a wheel/tire combo that is a good all around wheel (asphalt, grass, loose dirt) I am very interested to hear them.

[mkrusedc]

Thanks for the battery info. Do you have a link handy?

I have a set of Proline Mashers coming in the mail. Alot of people have recommended them as a great all purpose tire. Badlands are also often recommended.

[TexasSP]

Mashers are the best all around tire I have used. I am sure the badlands would be nice too but imagine that any running on pavement will wear them out quickly. I have a set of mashers that are 7 years old and barely have any wear at all running on all types of terrain with about 60% being street if that tells you anything.

[VintageMA]

I would go to rclipos.com for the batteries (use voucher poly4me for a 10% discount).

I have seen a lot of people using the badlands lately - might be worth a try (maybe with some of the medium OFNA foams) - but I have heard that mashers balloon a lot, no?

[E-Revonut]

when plugging figures into the calculator for the E-REVO be aware that the tranny gearing isn't any of the available selections. I don't recall off hand but I beleive it is 33/18. I tried using the same setup I had in my 3905, geared for about 37-38MPH but it made the revo a rocket! Then I looked in the parts lists and found the gears where different. 68/20 with an 8xl is in the 40MPH neighborhood maybe even a touch faster. Running 4s 6000mah maxamps packs and getting about 15 minutes mostly full throttle

[kulangflow]

I thought the E-Revo and E-maxx 3905 used the same diff and tranny, but with a different motor plate. They should have the same gearing from what I've heard.

Am I completely off? Perhaps it's faster because it's lighter or something?

[mkrusedc]

I think you are right use the E-Maxx 3905 setting.

[jayjay283]

the emaxx 3905 and e-revo both have "Overall Drive Ratio 18.67 (stock, out-of-box)" and the same size tires 5.75" according to Traxxas online specs sheet

[Cain]

Good thread. I just got my E-revo in this morning and for the 30 minutes I had to sit down with it, this is what I found if it helps anyone:

- E-revo is appears much longer than 3905 emaxx

- E-revo would benefit from offset rims (at least, thats how it looks).

- TrueRC 2S 8000mah 15C packs will fit the stock trays, just remove that little tensioner clip. After that is removed, didn't notice any major tray flexing. The wiring on them also works well in the trays too. I am wondering if the who limitation of 28mm was what was defined with the tensioner in there. After reading up on some testing between maxamps 20C 8000s and TrueRC 15C 8000s, these TrueRC ones should work very well.

- Proline Harddrive body looks like it will fit.


As for the badland tires, I found they worked very well. I used them as racing tires on the 3905 Emaxx I have, and I was very impressed. Traction was quite predictable and handling was very good. This was against a field of truggies as well, and I didn't feel traction was an issue on a dry track. Wear is very good too. Liked it so much I ordered another set specific for the revo (others mounted on 23mm rims).

For racing, went with LPR Bowties on Rulux rims, offset.

[VintageMA]

Originally Posted by mkrusedc

I think you are right use the E-Maxx 3905 setting.

It actually says in the manual that the tranny plus diffs is a 5.22 ratio. So that is what I have been plugging into the calculator along with the pinion and spur settings.

[jayjay283]

yeah it says on page 25 of the manual 5.22 ratio 68 spur 19 pinion, cant see the diff #s though http://www.traxxas.com/PDF-Library/5605_manual.pdf

[VintageMA]

Yeah - 5.22 is the ratio of the diffs and tranny combined. Would be nice to try and figure out the ratios for each, but the parts listing for the ring and pinion gears don't give numbers. Looks like there are some tranny option parts available that will allow you to raise or lower the gearing ratios but I don't really see the point with the variety of pinions and spurs available and it being a one-speed.

[E-Revonut]

the diff ratio is the same as the revo/3905 MAXX. But looking at my book that came with E-REVO with the exploded views and part listings it says the input gear is 18 and the output gear is 33. So I have proven myself wrong! I know it has been discussed in another thread but could the increased speed be the mmm instead of mm? That is the only thing I have changed going from my 3905 to e-revo. I pulled everything from the maxx, sold it and put it on revo but used mmm instead. 3905 I was running 62/20 for decent speed. Same motor, batteries,pinion, and even ran talons on 3905.

[VintageMA]

Quick update - loving this truck.

Got the Badlands MT with Maximizer Bead-Locks (my first set of bead locks - first one was a real pain to get put together, but the other three were a breeze. they are really great - only complaint is that little pebbles can get stuck between the tire and the bead but easy enough to clean out and less of a pain than regluing tires)

Motor of choice for me until I decide to change it up is the MMM with Tekno 1515/2.5d and 18/62 gearing. It's a modest 35mph, but lots of power and tons of fun to run. With the 6S 5000mAh packs I am taking out about 50% in about 15-20 minutes of hard running.

[BL_RV0]

No video?