Randy_Pike

iTrader: (6)

Relax guys, lots of tracks limit the batteries on indoor 1/8 cars. It's certainly not new.

The Rx8 is the clear choice for ESC, but motor wise you have a few options:

1. Go with a 3s and T8i 2700kv
2. Go 2s with a Pro4 HD 4300kv
3. Convince the local track that 4s is more efficient and simply follow the 1/8 "Lite" class rules I posted a few years back(you can Google it). Simply run 4s and limit the KV and diameter of the motors being used to reduce power, etc.

PorTX

iTrader: (4)

Krio

iTrader: (159)

The 1900 is the most popular choice on 4s. If you are on a very large track or need to clear larger than average jumps, the 2050 will get you there. The 2000kv and 2100kv motors are meant for truggies as they are the long can versions.

Motor Length:
4030 Buggy 69mm / 2.71"
4038 Truggy 77mm / 3.03"

Randy_Pike

iTrader: (6)

I prefer the 1900kv. Some like the 2050.

ta_man

iTrader: (168)

Saying "I prefer" implies you have a reason. Would you share your reason(s)?

I think that is what people would be interested in and we might learn things to consider that some of us hadn't thought of.

PorTX

iTrader: (4)

That is what I was trying to learn. I am thinking the 1900 might have a smoother powerband? If the 2050 just had more top end I could see the top level guys wanting that. However, wheel spin is always an issue with outdoor 1/8 racing so a flater torque curve would make the power more predictable? Who knows? Seems to be a question very few want to tackle?

UK.hardcore

1900 is a why wind, 2050 is a delta wind. imo, delta is sometimes a bit harsh.

Randy_Pike

iTrader: (6)

The 1900 is a wye wound motor very similar to 1/10 motors we race often. The 2050 is a delta wound motor so it's more of a nitro power band; softer on bottom with a good mid range hit. I prefer the linearity of the 1900 and wye wound motors.

azdakota97

iTrader: (7)

Randy,

I was curious. I had 2 gen 2 rx8's go dead on me after hard landings at the new Nitro Compound track and it kept me from running their first nitro warm up race. I have since obtained a new rx8 gen 3 and was instructed to use zeal tape under it and also to open the case and add a layer of servo tape under the board. Is that last step really needed? Thanks for any input.

TY@TEAMTEKIN

No, you don't need to open it up, there is plenty of support inside the GEN3.

Krio

iTrader: (159)

Opening up the case to add extra support was a Gen 1 trick. Definitely isn't needed anymore and might even stress the components more.

azdakota97

iTrader: (7)

Awesome. Glad to hear that. I didn't really want to. Thank you for the quick replies!

Apexscalpel

Note: This question relates to the RX8 Gen I, that I have put in a RX8 Gen 2 case, but this RX8 thread is more active. Also, this question might be a generic ESC mounting questions as well.

I have a Losi SCTE, but I'm running it with an 1/8 scale buggy body, Badlands MX28 wheels, Tenshock SC411 4700kv, 11t pinion, Gensace 2s 5000mah 50c.

My RX8 Gen 1 case started to crack about about 18 months after I installed it, then I moved and stopped using my SCTE for a few years. About a month ago I started repairing and upgrading my truck and that included replacing the cracked Gen 1 case with a new Gen 2 case. I had to open up the hole for fan plug a little, but other than than everything went together smoothly. I had previously learned that double sided tape does not hold very well, so I fastened the ESC to the plastic mount with small screws from below into the supplied mounting holes on the case. I ran a few packs through it on flat ground doing some tuning and testing. Then yesterday I took it to a dirt jump track and after three modest jumps (landing on the down slope from about 4'-0" high) the Gen 2 case completely cracked in half and appears to have separated the boards inside. See attached photos.

My questions are as follows.

• From what you can see in the photos, does it appear that I have installed the ESC incorrectly that would increase the chances of damaging the ESC while landing jumps?
• I don't race anymore and just plan on bashing and jumping, instead of investing over $200 into a new RX8 would my money be better spent purchasing a Mamba Monster or a Hobbywing XR8 (the aluminum case appeals to me)? Are those ESC's typically more durable than the RX8?

Thanks in advance for any help or input!

Krio

iTrader: (159)

Unfortunately, I think you need to have more posts before you can share pictures. Can you upload them to another site and post the links? Definitely hard to comment without the pictures.

At the very least, don't toss the esc. Tekin offers the ability to send in your old RX8 in any condition for a discount on a brand new Gen3 RX8. I want to say it would be about $140 to exchange your broken setup for a Gen3, which is way more durable than the gen1 or 2.

UK.hardcore

if i decrease brake strength but increase rpm brake that should lower the high speed braking but keep the low speed close to where it is now , right?