Billy Kelly

iTrader: (9)

I'm using the 21.5 RTR version for USGT. Only tires and gearing change. Stock servo been solid to me.

E1 Diablo

iTrader: (10)

Good to hear. The servo specs look solid.

Billy Kelly

iTrader: (9)

Honestly never really looked at specs on servo. Just went with it how it was. Here's from my last race. I made a mistake with gearing, it worked but was wrong. But still ran solid.

https://youtu.be/QdHHdsH46ls

HugoW

I have a question about the springs. The kit came with 30N springs, 25mm uncompressed length. I like stiff front springs, but I needed softer in the rear as I have lost of oversteer. I bought the springs from HK’s BT-4 parts section, but these are, although softer, only 20mm uncompressed length. Why? On my Tamiya racers I had equal lengt hall around, I read somewhere shorter front springs can help reduce oversteer, but now I have short soft springs in the rear and long stiff ones in the front. Doesn’t sound right.
I found my Tamiya springs don’t fit, what springs / spring set do you guys run? I considered to upgrade to TRF damper set with spring set, but I don’t want to spend that now.
While looking for springs on the HK site, I also saw the progressive damper insert set. Any thoughts on that?

Cheers,

Hugo

E1 Diablo

iTrader: (10)

You may want to try installing a sway bar set if you haven't already installed one.

HugoW

I just did and it helps. What bars are you running? I have 1 in the back and 1,3 in the front. BTW, I run a very long asfalt track.

Hugo

E1 Diablo

iTrader: (10)

I just ordered my kit a couple days ago. I have not received it. I did buy sway bars and connectors when I placed the order. I bought the thinnest possible sway bars. I'll be running on a tight track. Front: 1.2 and Rear 1.1

E1 Diablo

iTrader: (10)

Good run. Great to see such an inexpensive car compete! Tighten up those lines!

Billy Kelly

iTrader: (9)

m.

I just try to be little better each week.

Billy Kelly

iTrader: (9)

Race day #7. Practice only. Limited turnout

https://youtu.be/g4ajjDv9y48

Was trying 37/75 gearing. Still not quite right.

Raketemensch

Thanks, I really love your reviews. They're very helpful, especially the race experience, since there's a strong idea that you need to spend a lot of money to do well, and you regularly disprove that with budget cars like this one, the Xi Sport and the TT02.

With that said, I'd like to get into racing, most likely VTA as that's the most popular class at my "local" track. Would you choose this car over the TT02 or the Xi Sport?

Billy Kelly

iTrader: (9)

I'm using mine for USGT. Think last year there was a Sakura running. Honestly wouldn't even consider the tt02. I actually chose to use the BT4 over my Serpent and XRay.

HugoW

I race my BT-4 in a really fast local class (10.5T motors, timing of my motor is at 47 degrees). I compete against XRays, HBs, and other big name cars. And th BT-4 holds up, although I cannot drive well enough yet. In the hands of one of our better drivers it goes really well. The only mods out of the box I have are adding sway bars, softer rear springs, mandatory tires for the class I race and a Protoform Mazda body. I run a cheap esc, the XCar from HobbyKing reprogrammed with HobbyWing firmware, and the TrackStar 10.5T motor. I have the cheapest car on the track, it is one of the fastest on the straight and in the hands of a good driver it is certainly A-final material.

Cheers,

Hugo

Raketemensch

Thanks guys, that’s great to hear.

Billy Kelly

iTrader: (9)

Race day #8. Practice and 3 rounds.

https://youtu.be/pnRlMgxVq1c


I think it's time to try switching to 64p gearing. Just can't seem to get it right. I was able to put drive a car running much quicker laps again. But I'm tired of being 2 seconds off pace. So far I've used 33,34,35/69 and current 37/75.